| /* Control and data flow functions for trees. |
| Copyright 2001, 2002 Free Software Foundation, Inc. |
| Contributed by Alexandre Oliva <aoliva@redhat.com> |
| |
| This file is part of GNU CC. |
| |
| GNU CC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU CC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "toplev.h" |
| #include "tree.h" |
| #include "tree-inline.h" |
| #include "rtl.h" |
| #include "expr.h" |
| #include "flags.h" |
| #include "params.h" |
| #include "input.h" |
| #include "insn-config.h" |
| #include "integrate.h" |
| #include "varray.h" |
| #include "hashtab.h" |
| #include "splay-tree.h" |
| #include "langhooks.h" |
| #include "diagnostic.h" |
| |
| /* This should be eventually be generalized to other languages, but |
| this would require a shared function-as-trees infrastructure. */ |
| #ifndef INLINER_FOR_JAVA |
| #include "c-common.h" |
| #else /* INLINER_FOR_JAVA */ |
| #include "parse.h" |
| #include "java-tree.h" |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* 0 if we should not perform inlining. |
| 1 if we should expand functions calls inline at the tree level. |
| 2 if we should consider *all* functions to be inline |
| candidates. */ |
| |
| int flag_inline_trees = 0; |
| |
| /* To Do: |
| |
| o In order to make inlining-on-trees work, we pessimized |
| function-local static constants. In particular, they are now |
| always output, even when not addressed. Fix this by treating |
| function-local static constants just like global static |
| constants; the back-end already knows not to output them if they |
| are not needed. |
| |
| o Provide heuristics to clamp inlining of recursive template |
| calls? */ |
| |
| /* Data required for function inlining. */ |
| |
| typedef struct inline_data |
| { |
| /* A stack of the functions we are inlining. For example, if we are |
| compiling `f', which calls `g', which calls `h', and we are |
| inlining the body of `h', the stack will contain, `h', followed |
| by `g', followed by `f'. The first few elements of the stack may |
| contain other functions that we know we should not recurse into, |
| even though they are not directly being inlined. */ |
| varray_type fns; |
| /* The index of the first element of FNS that really represents an |
| inlined function. */ |
| unsigned first_inlined_fn; |
| /* The label to jump to when a return statement is encountered. If |
| this value is NULL, then return statements will simply be |
| remapped as return statements, rather than as jumps. */ |
| tree ret_label; |
| /* The map from local declarations in the inlined function to |
| equivalents in the function into which it is being inlined. */ |
| splay_tree decl_map; |
| /* Nonzero if we are currently within the cleanup for a |
| TARGET_EXPR. */ |
| int in_target_cleanup_p; |
| /* A stack of the TARGET_EXPRs that we are currently processing. */ |
| varray_type target_exprs; |
| /* A list of the functions current function has inlined. */ |
| varray_type inlined_fns; |
| /* The approximate number of statements we have inlined in the |
| current call stack. */ |
| int inlined_stmts; |
| /* We use the same mechanism to build clones that we do to perform |
| inlining. However, there are a few places where we need to |
| distinguish between those two situations. This flag is true if |
| we are cloning, rather than inlining. */ |
| bool cloning_p; |
| /* Hash table used to prevent walk_tree from visiting the same node |
| umpteen million times. */ |
| htab_t tree_pruner; |
| } inline_data; |
| |
| /* Prototypes. */ |
| |
| static tree declare_return_variable PARAMS ((inline_data *, tree *)); |
| static tree copy_body_r PARAMS ((tree *, int *, void *)); |
| static tree copy_body PARAMS ((inline_data *)); |
| static tree expand_call_inline PARAMS ((tree *, int *, void *)); |
| static void expand_calls_inline PARAMS ((tree *, inline_data *)); |
| static int inlinable_function_p PARAMS ((tree, inline_data *)); |
| static tree remap_decl PARAMS ((tree, inline_data *)); |
| #ifndef INLINER_FOR_JAVA |
| static tree initialize_inlined_parameters PARAMS ((inline_data *, tree, tree)); |
| static void remap_block PARAMS ((tree, tree, inline_data *)); |
| static void copy_scope_stmt PARAMS ((tree *, int *, inline_data *)); |
| #else /* INLINER_FOR_JAVA */ |
| static tree initialize_inlined_parameters PARAMS ((inline_data *, tree, tree, tree)); |
| static void remap_block PARAMS ((tree *, tree, inline_data *)); |
| static tree add_stmt_to_compound PARAMS ((tree, tree, tree)); |
| #endif /* INLINER_FOR_JAVA */ |
| static tree find_alloca_call_1 PARAMS ((tree *, int *, void *)); |
| static tree find_alloca_call PARAMS ((tree)); |
| static tree find_builtin_longjmp_call_1 PARAMS ((tree *, int *, void *)); |
| static tree find_builtin_longjmp_call PARAMS ((tree)); |
| |
| /* The approximate number of instructions per statement. This number |
| need not be particularly accurate; it is used only to make |
| decisions about when a function is too big to inline. */ |
| #define INSNS_PER_STMT (10) |
| |
| /* Remap DECL during the copying of the BLOCK tree for the function. */ |
| |
| static tree |
| remap_decl (decl, id) |
| tree decl; |
| inline_data *id; |
| { |
| splay_tree_node n; |
| tree fn; |
| |
| /* We only remap local variables in the current function. */ |
| fn = VARRAY_TOP_TREE (id->fns); |
| if (! (*lang_hooks.tree_inlining.auto_var_in_fn_p) (decl, fn)) |
| return NULL_TREE; |
| |
| /* See if we have remapped this declaration. */ |
| n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); |
| /* If we didn't already have an equivalent for this declaration, |
| create one now. */ |
| if (!n) |
| { |
| tree t; |
| |
| /* Make a copy of the variable or label. */ |
| t = copy_decl_for_inlining (decl, fn, |
| VARRAY_TREE (id->fns, 0)); |
| |
| /* The decl T could be a dynamic array or other variable size type, |
| in which case some fields need to be remapped because they may |
| contain SAVE_EXPRs. */ |
| if (TREE_TYPE (t) && TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE |
| && TYPE_DOMAIN (TREE_TYPE (t))) |
| { |
| TREE_TYPE (t) = copy_node (TREE_TYPE (t)); |
| TYPE_DOMAIN (TREE_TYPE (t)) |
| = copy_node (TYPE_DOMAIN (TREE_TYPE (t))); |
| walk_tree (&TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (t))), |
| copy_body_r, id, NULL); |
| } |
| |
| #ifndef INLINER_FOR_JAVA |
| if (! DECL_NAME (t) && TREE_TYPE (t) |
| && (*lang_hooks.tree_inlining.anon_aggr_type_p) (TREE_TYPE (t))) |
| { |
| /* For a VAR_DECL of anonymous type, we must also copy the |
| member VAR_DECLS here and rechain the |
| DECL_ANON_UNION_ELEMS. */ |
| tree members = NULL; |
| tree src; |
| |
| for (src = DECL_ANON_UNION_ELEMS (t); src; |
| src = TREE_CHAIN (src)) |
| { |
| tree member = remap_decl (TREE_VALUE (src), id); |
| |
| if (TREE_PURPOSE (src)) |
| abort (); |
| members = tree_cons (NULL, member, members); |
| } |
| DECL_ANON_UNION_ELEMS (t) = nreverse (members); |
| } |
| #endif /* not INLINER_FOR_JAVA */ |
| |
| /* Remember it, so that if we encounter this local entity |
| again we can reuse this copy. */ |
| n = splay_tree_insert (id->decl_map, |
| (splay_tree_key) decl, |
| (splay_tree_value) t); |
| } |
| |
| return (tree) n->value; |
| } |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Copy the SCOPE_STMT_BLOCK associated with SCOPE_STMT to contain |
| remapped versions of the variables therein. And hook the new block |
| into the block-tree. If non-NULL, the DECLS are declarations to |
| add to use instead of the BLOCK_VARS in the old block. */ |
| #else /* INLINER_FOR_JAVA */ |
| /* Copy the BLOCK to contain remapped versions of the variables |
| therein. And hook the new block into the block-tree. */ |
| #endif /* INLINER_FOR_JAVA */ |
| |
| static void |
| #ifndef INLINER_FOR_JAVA |
| remap_block (scope_stmt, decls, id) |
| tree scope_stmt; |
| #else /* INLINER_FOR_JAVA */ |
| remap_block (block, decls, id) |
| tree *block; |
| #endif /* INLINER_FOR_JAVA */ |
| tree decls; |
| inline_data *id; |
| { |
| #ifndef INLINER_FOR_JAVA |
| /* We cannot do this in the cleanup for a TARGET_EXPR since we do |
| not know whether or not expand_expr will actually write out the |
| code we put there. If it does not, then we'll have more BLOCKs |
| than block-notes, and things will go awry. At some point, we |
| should make the back-end handle BLOCK notes in a tidier way, |
| without requiring a strict correspondence to the block-tree; then |
| this check can go. */ |
| if (id->in_target_cleanup_p) |
| { |
| SCOPE_STMT_BLOCK (scope_stmt) = NULL_TREE; |
| return; |
| } |
| |
| /* If this is the beginning of a scope, remap the associated BLOCK. */ |
| if (SCOPE_BEGIN_P (scope_stmt) && SCOPE_STMT_BLOCK (scope_stmt)) |
| { |
| tree old_block; |
| tree new_block; |
| tree old_var; |
| tree fn; |
| |
| /* Make the new block. */ |
| old_block = SCOPE_STMT_BLOCK (scope_stmt); |
| new_block = make_node (BLOCK); |
| TREE_USED (new_block) = TREE_USED (old_block); |
| BLOCK_ABSTRACT_ORIGIN (new_block) = old_block; |
| SCOPE_STMT_BLOCK (scope_stmt) = new_block; |
| |
| /* Remap its variables. */ |
| for (old_var = decls ? decls : BLOCK_VARS (old_block); |
| old_var; |
| old_var = TREE_CHAIN (old_var)) |
| { |
| tree new_var; |
| |
| /* Remap the variable. */ |
| new_var = remap_decl (old_var, id); |
| /* If we didn't remap this variable, so we can't mess with |
| its TREE_CHAIN. If we remapped this variable to |
| something other than a declaration (say, if we mapped it |
| to a constant), then we must similarly omit any mention |
| of it here. */ |
| if (!new_var || !DECL_P (new_var)) |
| ; |
| else |
| { |
| TREE_CHAIN (new_var) = BLOCK_VARS (new_block); |
| BLOCK_VARS (new_block) = new_var; |
| } |
| } |
| /* We put the BLOCK_VARS in reverse order; fix that now. */ |
| BLOCK_VARS (new_block) = nreverse (BLOCK_VARS (new_block)); |
| fn = VARRAY_TREE (id->fns, 0); |
| if (id->cloning_p) |
| /* We're building a clone; DECL_INITIAL is still |
| error_mark_node, and current_binding_level is the parm |
| binding level. */ |
| (*lang_hooks.decls.insert_block) (new_block); |
| else |
| { |
| /* Attach this new block after the DECL_INITIAL block for the |
| function into which this block is being inlined. In |
| rest_of_compilation we will straighten out the BLOCK tree. */ |
| tree *first_block; |
| if (DECL_INITIAL (fn)) |
| first_block = &BLOCK_CHAIN (DECL_INITIAL (fn)); |
| else |
| first_block = &DECL_INITIAL (fn); |
| BLOCK_CHAIN (new_block) = *first_block; |
| *first_block = new_block; |
| } |
| /* Remember the remapped block. */ |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) old_block, |
| (splay_tree_value) new_block); |
| } |
| /* If this is the end of a scope, set the SCOPE_STMT_BLOCK to be the |
| remapped block. */ |
| else if (SCOPE_END_P (scope_stmt) && SCOPE_STMT_BLOCK (scope_stmt)) |
| { |
| splay_tree_node n; |
| |
| /* Find this block in the table of remapped things. */ |
| n = splay_tree_lookup (id->decl_map, |
| (splay_tree_key) SCOPE_STMT_BLOCK (scope_stmt)); |
| if (! n) |
| abort (); |
| SCOPE_STMT_BLOCK (scope_stmt) = (tree) n->value; |
| } |
| #else /* INLINER_FOR_JAVA */ |
| tree old_block; |
| tree new_block; |
| tree old_var; |
| tree fn; |
| |
| /* Make the new block. */ |
| old_block = *block; |
| new_block = make_node (BLOCK); |
| TREE_USED (new_block) = TREE_USED (old_block); |
| BLOCK_ABSTRACT_ORIGIN (new_block) = old_block; |
| BLOCK_SUBBLOCKS (new_block) = BLOCK_SUBBLOCKS (old_block); |
| TREE_SIDE_EFFECTS (new_block) = TREE_SIDE_EFFECTS (old_block); |
| TREE_TYPE (new_block) = TREE_TYPE (old_block); |
| *block = new_block; |
| |
| /* Remap its variables. */ |
| for (old_var = decls ? decls : BLOCK_VARS (old_block); |
| old_var; |
| old_var = TREE_CHAIN (old_var)) |
| { |
| tree new_var; |
| |
| /* All local class initialization flags go in the outermost |
| scope. */ |
| if (LOCAL_CLASS_INITIALIZATION_FLAG_P (old_var)) |
| { |
| /* We may already have one. */ |
| if (! splay_tree_lookup (id->decl_map, (splay_tree_key) old_var)) |
| { |
| tree outermost_block; |
| new_var = remap_decl (old_var, id); |
| DECL_ABSTRACT_ORIGIN (new_var) = NULL; |
| outermost_block = DECL_SAVED_TREE (current_function_decl); |
| TREE_CHAIN (new_var) = BLOCK_VARS (outermost_block); |
| BLOCK_VARS (outermost_block) = new_var; |
| } |
| continue; |
| } |
| |
| /* Remap the variable. */ |
| new_var = remap_decl (old_var, id); |
| /* If we didn't remap this variable, so we can't mess with |
| its TREE_CHAIN. If we remapped this variable to |
| something other than a declaration (say, if we mapped it |
| to a constant), then we must similarly omit any mention |
| of it here. */ |
| if (!new_var || !DECL_P (new_var)) |
| ; |
| else |
| { |
| TREE_CHAIN (new_var) = BLOCK_VARS (new_block); |
| BLOCK_VARS (new_block) = new_var; |
| } |
| } |
| /* We put the BLOCK_VARS in reverse order; fix that now. */ |
| BLOCK_VARS (new_block) = nreverse (BLOCK_VARS (new_block)); |
| fn = VARRAY_TREE (id->fns, 0); |
| /* Remember the remapped block. */ |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) old_block, |
| (splay_tree_value) new_block); |
| #endif /* INLINER_FOR_JAVA */ |
| } |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Copy the SCOPE_STMT pointed to by TP. */ |
| |
| static void |
| copy_scope_stmt (tp, walk_subtrees, id) |
| tree *tp; |
| int *walk_subtrees; |
| inline_data *id; |
| { |
| tree block; |
| |
| /* Remember whether or not this statement was nullified. When |
| making a copy, copy_tree_r always sets SCOPE_NULLIFIED_P (and |
| doesn't copy the SCOPE_STMT_BLOCK) to free callers from having to |
| deal with copying BLOCKs if they do not wish to do so. */ |
| block = SCOPE_STMT_BLOCK (*tp); |
| /* Copy (and replace) the statement. */ |
| copy_tree_r (tp, walk_subtrees, NULL); |
| /* Restore the SCOPE_STMT_BLOCK. */ |
| SCOPE_STMT_BLOCK (*tp) = block; |
| |
| /* Remap the associated block. */ |
| remap_block (*tp, NULL_TREE, id); |
| } |
| #endif /* not INLINER_FOR_JAVA */ |
| |
| /* Called from copy_body via walk_tree. DATA is really an |
| `inline_data *'. */ |
| static tree |
| copy_body_r (tp, walk_subtrees, data) |
| tree *tp; |
| int *walk_subtrees; |
| void *data; |
| { |
| inline_data* id; |
| tree fn; |
| |
| /* Set up. */ |
| id = (inline_data *) data; |
| fn = VARRAY_TOP_TREE (id->fns); |
| |
| #if 0 |
| /* All automatic variables should have a DECL_CONTEXT indicating |
| what function they come from. */ |
| if ((TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == LABEL_DECL) |
| && DECL_NAMESPACE_SCOPE_P (*tp)) |
| if (! DECL_EXTERNAL (*tp) && ! TREE_STATIC (*tp)) |
| abort (); |
| #endif |
| |
| #ifdef INLINER_FOR_JAVA |
| if (TREE_CODE (*tp) == BLOCK) |
| remap_block (tp, NULL_TREE, id); |
| #endif |
| |
| /* If this is a RETURN_STMT, change it into an EXPR_STMT and a |
| GOTO_STMT with the RET_LABEL as its target. */ |
| #ifndef INLINER_FOR_JAVA |
| if (TREE_CODE (*tp) == RETURN_STMT && id->ret_label) |
| #else /* INLINER_FOR_JAVA */ |
| if (TREE_CODE (*tp) == RETURN_EXPR && id->ret_label) |
| #endif /* INLINER_FOR_JAVA */ |
| { |
| tree return_stmt = *tp; |
| tree goto_stmt; |
| |
| /* Build the GOTO_STMT. */ |
| #ifndef INLINER_FOR_JAVA |
| goto_stmt = build_stmt (GOTO_STMT, id->ret_label); |
| TREE_CHAIN (goto_stmt) = TREE_CHAIN (return_stmt); |
| GOTO_FAKE_P (goto_stmt) = 1; |
| #else /* INLINER_FOR_JAVA */ |
| tree assignment = TREE_OPERAND (return_stmt, 0); |
| goto_stmt = build1 (GOTO_EXPR, void_type_node, id->ret_label); |
| TREE_SIDE_EFFECTS (goto_stmt) = 1; |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* If we're returning something, just turn that into an |
| assignment into the equivalent of the original |
| RESULT_DECL. */ |
| #ifndef INLINER_FOR_JAVA |
| if (RETURN_STMT_EXPR (return_stmt)) |
| { |
| *tp = build_stmt (EXPR_STMT, |
| RETURN_STMT_EXPR (return_stmt)); |
| STMT_IS_FULL_EXPR_P (*tp) = 1; |
| /* And then jump to the end of the function. */ |
| TREE_CHAIN (*tp) = goto_stmt; |
| } |
| #else /* INLINER_FOR_JAVA */ |
| if (assignment) |
| { |
| copy_body_r (&assignment, walk_subtrees, data); |
| *tp = build (COMPOUND_EXPR, void_type_node, assignment, goto_stmt); |
| TREE_SIDE_EFFECTS (*tp) = 1; |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| /* If we're not returning anything just do the jump. */ |
| else |
| *tp = goto_stmt; |
| } |
| /* Local variables and labels need to be replaced by equivalent |
| variables. We don't want to copy static variables; there's only |
| one of those, no matter how many times we inline the containing |
| function. */ |
| else if ((*lang_hooks.tree_inlining.auto_var_in_fn_p) (*tp, fn)) |
| { |
| tree new_decl; |
| |
| /* Remap the declaration. */ |
| new_decl = remap_decl (*tp, id); |
| if (! new_decl) |
| abort (); |
| /* Replace this variable with the copy. */ |
| STRIP_TYPE_NOPS (new_decl); |
| *tp = new_decl; |
| } |
| #if 0 |
| else if (nonstatic_local_decl_p (*tp) |
| && DECL_CONTEXT (*tp) != VARRAY_TREE (id->fns, 0)) |
| abort (); |
| #endif |
| else if (TREE_CODE (*tp) == SAVE_EXPR) |
| remap_save_expr (tp, id->decl_map, VARRAY_TREE (id->fns, 0), |
| walk_subtrees); |
| else if (TREE_CODE (*tp) == UNSAVE_EXPR) |
| /* UNSAVE_EXPRs should not be generated until expansion time. */ |
| abort (); |
| #ifndef INLINER_FOR_JAVA |
| /* For a SCOPE_STMT, we must copy the associated block so that we |
| can write out debugging information for the inlined variables. */ |
| else if (TREE_CODE (*tp) == SCOPE_STMT && !id->in_target_cleanup_p) |
| copy_scope_stmt (tp, walk_subtrees, id); |
| #else /* INLINER_FOR_JAVA */ |
| else if (TREE_CODE (*tp) == LABELED_BLOCK_EXPR) |
| { |
| /* We need a new copy of this labeled block; the EXIT_BLOCK_EXPR |
| will refer to it, so save a copy ready for remapping. We |
| save it in the decl_map, although it isn't a decl. */ |
| tree new_block = copy_node (*tp); |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) *tp, |
| (splay_tree_value) new_block); |
| *tp = new_block; |
| } |
| else if (TREE_CODE (*tp) == EXIT_BLOCK_EXPR) |
| { |
| splay_tree_node n |
| = splay_tree_lookup (id->decl_map, |
| (splay_tree_key) TREE_OPERAND (*tp, 0)); |
| /* We _must_ have seen the enclosing LABELED_BLOCK_EXPR. */ |
| if (! n) |
| abort (); |
| *tp = copy_node (*tp); |
| TREE_OPERAND (*tp, 0) = (tree) n->value; |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| /* Otherwise, just copy the node. Note that copy_tree_r already |
| knows not to copy VAR_DECLs, etc., so this is safe. */ |
| else |
| { |
| copy_tree_r (tp, walk_subtrees, NULL); |
| |
| /* The copied TARGET_EXPR has never been expanded, even if the |
| original node was expanded already. */ |
| if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3)) |
| { |
| TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3); |
| TREE_OPERAND (*tp, 3) = NULL_TREE; |
| } |
| else if (TREE_CODE (*tp) == MODIFY_EXPR |
| && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1) |
| && ((*lang_hooks.tree_inlining.auto_var_in_fn_p) |
| (TREE_OPERAND (*tp, 0), fn))) |
| { |
| /* Some assignments VAR = VAR; don't generate any rtl code |
| and thus don't count as variable modification. Avoid |
| keeping bogosities like 0 = 0. */ |
| tree decl = TREE_OPERAND (*tp, 0), value; |
| splay_tree_node n; |
| |
| n = splay_tree_lookup (id->decl_map, (splay_tree_key) decl); |
| if (n) |
| { |
| value = (tree) n->value; |
| STRIP_TYPE_NOPS (value); |
| if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) |
| *tp = value; |
| } |
| } |
| } |
| |
| /* Keep iterating. */ |
| return NULL_TREE; |
| } |
| |
| /* Make a copy of the body of FN so that it can be inserted inline in |
| another function. */ |
| |
| static tree |
| copy_body (id) |
| inline_data *id; |
| { |
| tree body; |
| |
| body = DECL_SAVED_TREE (VARRAY_TOP_TREE (id->fns)); |
| walk_tree (&body, copy_body_r, id, NULL); |
| |
| return body; |
| } |
| |
| /* Generate code to initialize the parameters of the function at the |
| top of the stack in ID from the ARGS (presented as a TREE_LIST). */ |
| |
| static tree |
| #ifndef INLINER_FOR_JAVA |
| initialize_inlined_parameters (id, args, fn) |
| #else /* INLINER_FOR_JAVA */ |
| initialize_inlined_parameters (id, args, fn, block) |
| #endif /* INLINER_FOR_JAVA */ |
| inline_data *id; |
| tree args; |
| tree fn; |
| #ifdef INLINER_FOR_JAVA |
| tree block; |
| #endif /* INLINER_FOR_JAVA */ |
| { |
| tree init_stmts; |
| tree parms; |
| tree a; |
| tree p; |
| #ifdef INLINER_FOR_JAVA |
| tree vars = NULL_TREE; |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Figure out what the parameters are. */ |
| parms = DECL_ARGUMENTS (fn); |
| |
| /* Start with no initializations whatsoever. */ |
| init_stmts = NULL_TREE; |
| |
| /* Loop through the parameter declarations, replacing each with an |
| equivalent VAR_DECL, appropriately initialized. */ |
| for (p = parms, a = args; p; |
| a = a ? TREE_CHAIN (a) : a, p = TREE_CHAIN (p)) |
| { |
| #ifndef INLINER_FOR_JAVA |
| tree init_stmt; |
| tree cleanup; |
| #endif /* not INLINER_FOR_JAVA */ |
| tree var; |
| tree value; |
| tree var_sub; |
| |
| /* Find the initializer. */ |
| value = (*lang_hooks.tree_inlining.convert_parm_for_inlining) |
| (p, a ? TREE_VALUE (a) : NULL_TREE, fn); |
| |
| /* If the parameter is never assigned to, we may not need to |
| create a new variable here at all. Instead, we may be able |
| to just use the argument value. */ |
| if (TREE_READONLY (p) |
| && !TREE_ADDRESSABLE (p) |
| && value && !TREE_SIDE_EFFECTS (value)) |
| { |
| /* Simplify the value, if possible. */ |
| value = fold (DECL_P (value) ? decl_constant_value (value) : value); |
| |
| /* We can't risk substituting complex expressions. They |
| might contain variables that will be assigned to later. |
| Theoretically, we could check the expression to see if |
| all of the variables that determine its value are |
| read-only, but we don't bother. */ |
| if (TREE_CONSTANT (value) || TREE_READONLY_DECL_P (value)) |
| { |
| /* If this is a declaration, wrap it a NOP_EXPR so that |
| we don't try to put the VALUE on the list of |
| BLOCK_VARS. */ |
| if (DECL_P (value)) |
| value = build1 (NOP_EXPR, TREE_TYPE (value), value); |
| |
| /* If this is a constant, make sure it has the right type. */ |
| else if (TREE_TYPE (value) != TREE_TYPE (p)) |
| value = fold (build1 (NOP_EXPR, TREE_TYPE (p), value)); |
| |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) p, |
| (splay_tree_value) value); |
| continue; |
| } |
| } |
| |
| /* Make an equivalent VAR_DECL. */ |
| var = copy_decl_for_inlining (p, fn, VARRAY_TREE (id->fns, 0)); |
| |
| /* See if the frontend wants to pass this by invisible reference. If |
| so, our new VAR_DECL will have REFERENCE_TYPE, and we need to |
| replace uses of the PARM_DECL with dereferences. */ |
| if (TREE_TYPE (var) != TREE_TYPE (p) |
| && POINTER_TYPE_P (TREE_TYPE (var)) |
| && TREE_TYPE (TREE_TYPE (var)) == TREE_TYPE (p)) |
| var_sub = build1 (INDIRECT_REF, TREE_TYPE (p), var); |
| else |
| var_sub = var; |
| |
| /* Register the VAR_DECL as the equivalent for the PARM_DECL; |
| that way, when the PARM_DECL is encountered, it will be |
| automatically replaced by the VAR_DECL. */ |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) p, |
| (splay_tree_value) var_sub); |
| |
| /* Declare this new variable. */ |
| #ifndef INLINER_FOR_JAVA |
| init_stmt = build_stmt (DECL_STMT, var); |
| TREE_CHAIN (init_stmt) = init_stmts; |
| init_stmts = init_stmt; |
| #else /* INLINER_FOR_JAVA */ |
| TREE_CHAIN (var) = vars; |
| vars = var; |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Initialize this VAR_DECL from the equivalent argument. If |
| the argument is an object, created via a constructor or copy, |
| this will not result in an extra copy: the TARGET_EXPR |
| representing the argument will be bound to VAR, and the |
| object will be constructed in VAR. */ |
| if (! TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p))) |
| #ifndef INLINER_FOR_JAVA |
| DECL_INITIAL (var) = value; |
| else |
| { |
| /* Even if P was TREE_READONLY, the new VAR should not be. |
| In the original code, we would have constructed a |
| temporary, and then the function body would have never |
| changed the value of P. However, now, we will be |
| constructing VAR directly. The constructor body may |
| change its value multiple times as it is being |
| constructed. Therefore, it must not be TREE_READONLY; |
| the back-end assumes that TREE_READONLY variable is |
| assigned to only once. */ |
| TREE_READONLY (var) = 0; |
| |
| /* Build a run-time initialization. */ |
| init_stmt = build_stmt (EXPR_STMT, |
| build (INIT_EXPR, TREE_TYPE (p), |
| var, value)); |
| /* Add this initialization to the list. Note that we want the |
| declaration *after* the initialization because we are going |
| to reverse all the initialization statements below. */ |
| TREE_CHAIN (init_stmt) = init_stmts; |
| init_stmts = init_stmt; |
| } |
| |
| /* See if we need to clean up the declaration. */ |
| cleanup = (*lang_hooks.maybe_build_cleanup) (var); |
| if (cleanup) |
| { |
| tree cleanup_stmt; |
| /* Build the cleanup statement. */ |
| cleanup_stmt = build_stmt (CLEANUP_STMT, var, cleanup); |
| /* Add it to the *front* of the list; the list will be |
| reversed below. */ |
| TREE_CHAIN (cleanup_stmt) = init_stmts; |
| init_stmts = cleanup_stmt; |
| } |
| #else /* INLINER_FOR_JAVA */ |
| { |
| tree assignment = build (MODIFY_EXPR, TREE_TYPE (p), var, value); |
| init_stmts = add_stmt_to_compound (init_stmts, TREE_TYPE (p), |
| assignment); |
| } |
| else |
| { |
| /* Java objects don't ever need constructing when being |
| passed as arguments because only call by reference is |
| supported. */ |
| abort (); |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| } |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Evaluate trailing arguments. */ |
| for (; a; a = TREE_CHAIN (a)) |
| { |
| tree init_stmt; |
| tree value = TREE_VALUE (a); |
| |
| if (! value || ! TREE_SIDE_EFFECTS (value)) |
| continue; |
| |
| init_stmt = build_stmt (EXPR_STMT, value); |
| TREE_CHAIN (init_stmt) = init_stmts; |
| init_stmts = init_stmt; |
| } |
| |
| /* The initialization statements have been built up in reverse |
| order. Straighten them out now. */ |
| return nreverse (init_stmts); |
| #else /* INLINER_FOR_JAVA */ |
| BLOCK_VARS (block) = nreverse (vars); |
| return init_stmts; |
| #endif /* INLINER_FOR_JAVA */ |
| } |
| |
| /* Declare a return variable to replace the RESULT_DECL for the |
| function we are calling. An appropriate DECL_STMT is returned. |
| The USE_STMT is filled in to contain a use of the declaration to |
| indicate the return value of the function. */ |
| |
| #ifndef INLINER_FOR_JAVA |
| static tree |
| declare_return_variable (id, use_stmt) |
| struct inline_data *id; |
| tree *use_stmt; |
| #else /* INLINER_FOR_JAVA */ |
| static tree |
| declare_return_variable (id, var) |
| struct inline_data *id; |
| tree *var; |
| #endif /* INLINER_FOR_JAVA */ |
| { |
| tree fn = VARRAY_TOP_TREE (id->fns); |
| tree result = DECL_RESULT (fn); |
| #ifndef INLINER_FOR_JAVA |
| tree var; |
| #endif /* not INLINER_FOR_JAVA */ |
| int need_return_decl = 1; |
| |
| /* We don't need to do anything for functions that don't return |
| anything. */ |
| if (!result || VOID_TYPE_P (TREE_TYPE (result))) |
| { |
| #ifndef INLINER_FOR_JAVA |
| *use_stmt = NULL_TREE; |
| #else /* INLINER_FOR_JAVA */ |
| *var = NULL_TREE; |
| #endif /* INLINER_FOR_JAVA */ |
| return NULL_TREE; |
| } |
| |
| #ifndef INLINER_FOR_JAVA |
| var = ((*lang_hooks.tree_inlining.copy_res_decl_for_inlining) |
| (result, fn, VARRAY_TREE (id->fns, 0), id->decl_map, |
| &need_return_decl, &id->target_exprs)); |
| |
| /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that |
| way, when the RESULT_DECL is encountered, it will be |
| automatically replaced by the VAR_DECL. */ |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) result, |
| (splay_tree_value) var); |
| |
| /* Build the USE_STMT. If the return type of the function was |
| promoted, convert it back to the expected type. */ |
| if (TREE_TYPE (var) == TREE_TYPE (TREE_TYPE (fn))) |
| *use_stmt = build_stmt (EXPR_STMT, var); |
| else |
| *use_stmt = build_stmt (EXPR_STMT, |
| build1 (NOP_EXPR, TREE_TYPE (TREE_TYPE (fn)), |
| var)); |
| TREE_ADDRESSABLE (*use_stmt) = 1; |
| |
| /* Build the declaration statement if FN does not return an |
| aggregate. */ |
| if (need_return_decl) |
| return build_stmt (DECL_STMT, var); |
| #else /* INLINER_FOR_JAVA */ |
| *var = ((*lang_hooks.tree_inlining.copy_res_decl_for_inlining) |
| (result, fn, VARRAY_TREE (id->fns, 0), id->decl_map, |
| &need_return_decl, NULL_TREE)); |
| |
| splay_tree_insert (id->decl_map, |
| (splay_tree_key) result, |
| (splay_tree_value) *var); |
| DECL_IGNORED_P (*var) = 1; |
| if (need_return_decl) |
| return *var; |
| #endif /* INLINER_FOR_JAVA */ |
| /* If FN does return an aggregate, there's no need to declare the |
| return variable; we're using a variable in our caller's frame. */ |
| else |
| return NULL_TREE; |
| } |
| |
| /* Returns nonzero if a function can be inlined as a tree. */ |
| |
| int |
| tree_inlinable_function_p (fn) |
| tree fn; |
| { |
| return inlinable_function_p (fn, NULL); |
| } |
| |
| /* If *TP is possibly call to alloca, return nonzero. */ |
| static tree |
| find_alloca_call_1 (tp, walk_subtrees, data) |
| tree *tp; |
| int *walk_subtrees ATTRIBUTE_UNUSED; |
| void *data ATTRIBUTE_UNUSED; |
| { |
| if (alloca_call_p (*tp)) |
| return *tp; |
| return NULL; |
| } |
| |
| /* Return subexpression representing possible alloca call, if any. */ |
| static tree |
| find_alloca_call (exp) |
| tree exp; |
| { |
| return walk_tree_without_duplicates (&exp, find_alloca_call_1, NULL); |
| } |
| |
| static tree |
| find_builtin_longjmp_call_1 (tp, walk_subtrees, data) |
| tree *tp; |
| int *walk_subtrees ATTRIBUTE_UNUSED; |
| void *data ATTRIBUTE_UNUSED; |
| { |
| tree exp = *tp, decl; |
| |
| if (TREE_CODE (exp) == CALL_EXPR |
| && TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR |
| && (decl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0), |
| TREE_CODE (decl) == FUNCTION_DECL) |
| && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL |
| && DECL_FUNCTION_CODE (decl) == BUILT_IN_LONGJMP) |
| return decl; |
| |
| return NULL; |
| } |
| |
| static tree |
| find_builtin_longjmp_call (exp) |
| tree exp; |
| { |
| return walk_tree_without_duplicates (&exp, find_builtin_longjmp_call_1, NULL); |
| } |
| |
| /* Returns nonzero if FN is a function that can be inlined into the |
| inlining context ID_. If ID_ is NULL, check whether the function |
| can be inlined at all. */ |
| |
| static int |
| inlinable_function_p (fn, id) |
| tree fn; |
| inline_data *id; |
| { |
| int inlinable; |
| int currfn_insns; |
| int max_inline_insns_single = MAX_INLINE_INSNS_SINGLE; |
| |
| /* If we've already decided this function shouldn't be inlined, |
| there's no need to check again. */ |
| if (DECL_UNINLINABLE (fn)) |
| return 0; |
| |
| /* Assume it is not inlinable. */ |
| inlinable = 0; |
| |
| /* We may be here either because fn is declared inline or because |
| we use -finline-functions. For the second case, we are more |
| restrictive. */ |
| if (DID_INLINE_FUNC (fn)) |
| max_inline_insns_single = MAX_INLINE_INSNS_AUTO; |
| |
| /* The number of instructions (estimated) of current function. */ |
| currfn_insns = DECL_NUM_STMTS (fn) * INSNS_PER_STMT; |
| |
| /* If we're not inlining things, then nothing is inlinable. */ |
| if (! flag_inline_trees) |
| ; |
| /* If we're not inlining all functions and the function was not |
| declared `inline', we don't inline it. Don't think of |
| disregarding DECL_INLINE when flag_inline_trees == 2; it's the |
| front-end that must set DECL_INLINE in this case, because |
| dwarf2out loses if a function is inlined that doesn't have |
| DECL_INLINE set. */ |
| else if (! DECL_INLINE (fn)) |
| ; |
| #ifdef INLINER_FOR_JAVA |
| /* Synchronized methods can't be inlined. This is a bug. */ |
| else if (METHOD_SYNCHRONIZED (fn)) |
| ; |
| #endif /* INLINER_FOR_JAVA */ |
| /* We can't inline functions that are too big. Only allow a single |
| function to be of MAX_INLINE_INSNS_SINGLE size. Make special |
| allowance for extern inline functions, though. */ |
| else if (! (*lang_hooks.tree_inlining.disregard_inline_limits) (fn) |
| && currfn_insns > max_inline_insns_single) |
| ; |
| /* We can't inline functions that call __builtin_longjmp at all. |
| The non-local goto machenery really requires the destination |
| be in a different function. If we allow the function calling |
| __builtin_longjmp to be inlined into the function calling |
| __builtin_setjmp, Things will Go Awry. */ |
| /* ??? Need front end help to identify "regular" non-local goto. */ |
| else if (find_builtin_longjmp_call (DECL_SAVED_TREE (fn))) |
| ; |
| /* Refuse to inline alloca call unless user explicitly forced so as this may |
| change program's memory overhead drastically when the function using alloca |
| is called in loop. In GCC present in SPEC2000 inlining into schedule_block |
| cause it to require 2GB of ram instead of 256MB. */ |
| else if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL |
| && find_alloca_call (DECL_SAVED_TREE (fn))) |
| ; |
| /* All is well. We can inline this function. Traditionally, GCC |
| has refused to inline functions using alloca, or functions whose |
| values are returned in a PARALLEL, and a few other such obscure |
| conditions. We are not equally constrained at the tree level. */ |
| else |
| inlinable = 1; |
| |
| /* Squirrel away the result so that we don't have to check again. */ |
| DECL_UNINLINABLE (fn) = ! inlinable; |
| |
| /* In case we don't disregard the inlining limits and we basically |
| can inline this function, investigate further. */ |
| if (! (*lang_hooks.tree_inlining.disregard_inline_limits) (fn) |
| && inlinable |
| && currfn_insns > MIN_INLINE_INSNS) |
| { |
| int sum_insns = (id ? id->inlined_stmts : 0) * INSNS_PER_STMT |
| + currfn_insns; |
| /* In the extreme case that we have exceeded the recursive inlining |
| limit by a huge factor (128), we just say no. Should not happen |
| in real life. */ |
| if (sum_insns > MAX_INLINE_INSNS * 128) |
| inlinable = 0; |
| /* If we did not hit the extreme limit, we use a linear function |
| with slope -1/MAX_INLINE_SLOPE to exceedingly decrease the |
| allowable size. We always allow a size of MIN_INLINE_INSNS |
| though. */ |
| else if (sum_insns > MAX_INLINE_INSNS) |
| { |
| int max_curr = MAX_INLINE_INSNS_SINGLE |
| - (sum_insns - MAX_INLINE_INSNS) / MAX_INLINE_SLOPE; |
| if (currfn_insns > max_curr) |
| inlinable = 0; |
| } |
| } |
| |
| if (inlinable && (*lang_hooks.tree_inlining.cannot_inline_tree_fn) (&fn)) |
| inlinable = 0; |
| |
| /* If we don't have the function body available, we can't inline |
| it. */ |
| if (! DECL_SAVED_TREE (fn)) |
| inlinable = 0; |
| |
| /* Check again, language hooks may have modified it. */ |
| if (! inlinable || DECL_UNINLINABLE (fn)) |
| return 0; |
| |
| /* Don't do recursive inlining, either. We don't record this in |
| DECL_UNINLINABLE; we may be able to inline this function later. */ |
| if (id) |
| { |
| size_t i; |
| |
| for (i = 0; i < VARRAY_ACTIVE_SIZE (id->fns); ++i) |
| if (VARRAY_TREE (id->fns, i) == fn) |
| return 0; |
| |
| if (DECL_INLINED_FNS (fn)) |
| { |
| int j; |
| tree inlined_fns = DECL_INLINED_FNS (fn); |
| |
| for (j = 0; j < TREE_VEC_LENGTH (inlined_fns); ++j) |
| if (TREE_VEC_ELT (inlined_fns, j) == VARRAY_TREE (id->fns, 0)) |
| return 0; |
| } |
| } |
| |
| /* Return the result. */ |
| return inlinable; |
| } |
| |
| /* If *TP is a CALL_EXPR, replace it with its inline expansion. */ |
| |
| static tree |
| expand_call_inline (tp, walk_subtrees, data) |
| tree *tp; |
| int *walk_subtrees; |
| void *data; |
| { |
| inline_data *id; |
| tree t; |
| tree expr; |
| tree stmt; |
| #ifndef INLINER_FOR_JAVA |
| tree chain; |
| tree scope_stmt; |
| tree use_stmt; |
| #else /* INLINER_FOR_JAVA */ |
| tree retvar; |
| #endif /* INLINER_FOR_JAVA */ |
| tree fn; |
| tree arg_inits; |
| tree *inlined_body; |
| splay_tree st; |
| |
| /* See what we've got. */ |
| id = (inline_data *) data; |
| t = *tp; |
| |
| /* Recurse, but letting recursive invocations know that we are |
| inside the body of a TARGET_EXPR. */ |
| if (TREE_CODE (*tp) == TARGET_EXPR) |
| { |
| #ifndef INLINER_FOR_JAVA |
| int i, len = first_rtl_op (TARGET_EXPR); |
| |
| /* We're walking our own subtrees. */ |
| *walk_subtrees = 0; |
| |
| /* Push *TP on the stack of pending TARGET_EXPRs. */ |
| VARRAY_PUSH_TREE (id->target_exprs, *tp); |
| |
| /* Actually walk over them. This loop is the body of |
| walk_trees, omitting the case where the TARGET_EXPR |
| itself is handled. */ |
| for (i = 0; i < len; ++i) |
| { |
| if (i == 2) |
| ++id->in_target_cleanup_p; |
| walk_tree (&TREE_OPERAND (*tp, i), expand_call_inline, data, |
| id->tree_pruner); |
| if (i == 2) |
| --id->in_target_cleanup_p; |
| } |
| |
| /* We're done with this TARGET_EXPR now. */ |
| VARRAY_POP (id->target_exprs); |
| |
| return NULL_TREE; |
| #else /* INLINER_FOR_JAVA */ |
| abort (); |
| #endif /* INLINER_FOR_JAVA */ |
| } |
| else if (TREE_CODE (t) == EXPR_WITH_FILE_LOCATION) |
| { |
| /* We're walking the subtree directly. */ |
| *walk_subtrees = 0; |
| /* Update the source position. */ |
| push_srcloc (EXPR_WFL_FILENAME (t), EXPR_WFL_LINENO (t)); |
| walk_tree (&EXPR_WFL_NODE (t), expand_call_inline, data, |
| id->tree_pruner); |
| /* Restore the original source position. */ |
| pop_srcloc (); |
| |
| return NULL_TREE; |
| } |
| |
| if (TYPE_P (t)) |
| /* Because types were not copied in copy_body, CALL_EXPRs beneath |
| them should not be expanded. This can happen if the type is a |
| dynamic array type, for example. */ |
| *walk_subtrees = 0; |
| |
| /* From here on, we're only interested in CALL_EXPRs. */ |
| if (TREE_CODE (t) != CALL_EXPR) |
| return NULL_TREE; |
| |
| /* First, see if we can figure out what function is being called. |
| If we cannot, then there is no hope of inlining the function. */ |
| fn = get_callee_fndecl (t); |
| if (!fn) |
| return NULL_TREE; |
| |
| /* If fn is a declaration of a function in a nested scope that was |
| globally declared inline, we don't set its DECL_INITIAL. |
| However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the |
| C++ front-end uses it for cdtors to refer to their internal |
| declarations, that are not real functions. Fortunately those |
| don't have trees to be saved, so we can tell by checking their |
| DECL_SAVED_TREE. */ |
| if (! DECL_INITIAL (fn) |
| && DECL_ABSTRACT_ORIGIN (fn) |
| && DECL_SAVED_TREE (DECL_ABSTRACT_ORIGIN (fn))) |
| fn = DECL_ABSTRACT_ORIGIN (fn); |
| |
| /* Don't try to inline functions that are not well-suited to |
| inlining. */ |
| if (!inlinable_function_p (fn, id)) |
| { |
| if (warn_inline && DECL_INLINE (fn) && !DID_INLINE_FUNC (fn) |
| && !DECL_IN_SYSTEM_HEADER (fn) |
| && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn))) |
| { |
| warning_with_decl (fn, "inlining failed in call to `%s'"); |
| warning ("called from here"); |
| } |
| return NULL_TREE; |
| } |
| |
| if (! (*lang_hooks.tree_inlining.start_inlining) (fn)) |
| return NULL_TREE; |
| |
| /* Set the current filename and line number to the function we are |
| inlining so that when we create new _STMT nodes here they get |
| line numbers corresponding to the function we are calling. We |
| wrap the whole inlined body in an EXPR_WITH_FILE_AND_LINE as well |
| because individual statements don't record the filename. */ |
| push_srcloc (DECL_SOURCE_FILE (fn), DECL_SOURCE_LINE (fn)); |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Build a statement-expression containing code to initialize the |
| arguments, the actual inline expansion of the body, and a label |
| for the return statements within the function to jump to. The |
| type of the statement expression is the return type of the |
| function call. */ |
| expr = build1 (STMT_EXPR, TREE_TYPE (TREE_TYPE (fn)), make_node (COMPOUND_STMT)); |
| /* There is no scope associated with the statement-expression. */ |
| STMT_EXPR_NO_SCOPE (expr) = 1; |
| stmt = STMT_EXPR_STMT (expr); |
| #else /* INLINER_FOR_JAVA */ |
| /* Build a block containing code to initialize the arguments, the |
| actual inline expansion of the body, and a label for the return |
| statements within the function to jump to. The type of the |
| statement expression is the return type of the function call. */ |
| stmt = NULL; |
| expr = build (BLOCK, TREE_TYPE (TREE_TYPE (fn)), stmt); |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Local declarations will be replaced by their equivalents in this |
| map. */ |
| st = id->decl_map; |
| id->decl_map = splay_tree_new (splay_tree_compare_pointers, |
| NULL, NULL); |
| |
| /* Initialize the parameters. */ |
| #ifndef INLINER_FOR_JAVA |
| arg_inits = initialize_inlined_parameters (id, TREE_OPERAND (t, 1), fn); |
| /* Expand any inlined calls in the initializers. Do this before we |
| push FN on the stack of functions we are inlining; we want to |
| inline calls to FN that appear in the initializers for the |
| parameters. */ |
| expand_calls_inline (&arg_inits, id); |
| /* And add them to the tree. */ |
| COMPOUND_BODY (stmt) = chainon (COMPOUND_BODY (stmt), arg_inits); |
| #else /* INLINER_FOR_JAVA */ |
| arg_inits = initialize_inlined_parameters (id, TREE_OPERAND (t, 1), fn, expr); |
| if (arg_inits) |
| { |
| /* Expand any inlined calls in the initializers. Do this before we |
| push FN on the stack of functions we are inlining; we want to |
| inline calls to FN that appear in the initializers for the |
| parameters. */ |
| expand_calls_inline (&arg_inits, id); |
| |
| /* And add them to the tree. */ |
| BLOCK_EXPR_BODY (expr) = add_stmt_to_compound (BLOCK_EXPR_BODY (expr), |
| TREE_TYPE (arg_inits), |
| arg_inits); |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Record the function we are about to inline so that we can avoid |
| recursing into it. */ |
| VARRAY_PUSH_TREE (id->fns, fn); |
| |
| /* Record the function we are about to inline if optimize_function |
| has not been called on it yet and we don't have it in the list. */ |
| if (! DECL_INLINED_FNS (fn)) |
| { |
| int i; |
| |
| for (i = VARRAY_ACTIVE_SIZE (id->inlined_fns) - 1; i >= 0; i--) |
| if (VARRAY_TREE (id->inlined_fns, i) == fn) |
| break; |
| if (i < 0) |
| VARRAY_PUSH_TREE (id->inlined_fns, fn); |
| } |
| |
| /* Return statements in the function body will be replaced by jumps |
| to the RET_LABEL. */ |
| id->ret_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE); |
| DECL_CONTEXT (id->ret_label) = VARRAY_TREE (id->fns, 0); |
| |
| if (! DECL_INITIAL (fn) |
| || TREE_CODE (DECL_INITIAL (fn)) != BLOCK) |
| abort (); |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Create a block to put the parameters in. We have to do this |
| after the parameters have been remapped because remapping |
| parameters is different from remapping ordinary variables. */ |
| scope_stmt = build_stmt (SCOPE_STMT, DECL_INITIAL (fn)); |
| SCOPE_BEGIN_P (scope_stmt) = 1; |
| SCOPE_NO_CLEANUPS_P (scope_stmt) = 1; |
| remap_block (scope_stmt, DECL_ARGUMENTS (fn), id); |
| TREE_CHAIN (scope_stmt) = COMPOUND_BODY (stmt); |
| COMPOUND_BODY (stmt) = scope_stmt; |
| |
| /* Tell the debugging backends that this block represents the |
| outermost scope of the inlined function. */ |
| if (SCOPE_STMT_BLOCK (scope_stmt)) |
| BLOCK_ABSTRACT_ORIGIN (SCOPE_STMT_BLOCK (scope_stmt)) = DECL_ORIGIN (fn); |
| |
| /* Declare the return variable for the function. */ |
| COMPOUND_BODY (stmt) |
| = chainon (COMPOUND_BODY (stmt), |
| declare_return_variable (id, &use_stmt)); |
| #else /* INLINER_FOR_JAVA */ |
| { |
| /* Declare the return variable for the function. */ |
| tree decl = declare_return_variable (id, &retvar); |
| if (retvar) |
| { |
| tree *next = &BLOCK_VARS (expr); |
| while (*next) |
| next = &TREE_CHAIN (*next); |
| *next = decl; |
| } |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* After we've initialized the parameters, we insert the body of the |
| function itself. */ |
| #ifndef INLINER_FOR_JAVA |
| inlined_body = &COMPOUND_BODY (stmt); |
| while (*inlined_body) |
| inlined_body = &TREE_CHAIN (*inlined_body); |
| *inlined_body = copy_body (id); |
| #else /* INLINER_FOR_JAVA */ |
| { |
| tree new_body; |
| java_inlining_map_static_initializers (fn, id->decl_map); |
| new_body = copy_body (id); |
| TREE_TYPE (new_body) = TREE_TYPE (TREE_TYPE (fn)); |
| BLOCK_EXPR_BODY (expr) |
| = add_stmt_to_compound (BLOCK_EXPR_BODY (expr), |
| TREE_TYPE (new_body), new_body); |
| inlined_body = &BLOCK_EXPR_BODY (expr); |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* After the body of the function comes the RET_LABEL. This must come |
| before we evaluate the returned value below, because that evalulation |
| may cause RTL to be generated. */ |
| #ifndef INLINER_FOR_JAVA |
| COMPOUND_BODY (stmt) |
| = chainon (COMPOUND_BODY (stmt), |
| build_stmt (LABEL_STMT, id->ret_label)); |
| #else /* INLINER_FOR_JAVA */ |
| { |
| tree label = build1 (LABEL_EXPR, void_type_node, id->ret_label); |
| BLOCK_EXPR_BODY (expr) |
| = add_stmt_to_compound (BLOCK_EXPR_BODY (expr), void_type_node, label); |
| TREE_SIDE_EFFECTS (label) = TREE_SIDE_EFFECTS (t); |
| } |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Finally, mention the returned value so that the value of the |
| statement-expression is the returned value of the function. */ |
| #ifndef INLINER_FOR_JAVA |
| COMPOUND_BODY (stmt) = chainon (COMPOUND_BODY (stmt), use_stmt); |
| |
| /* Close the block for the parameters. */ |
| scope_stmt = build_stmt (SCOPE_STMT, DECL_INITIAL (fn)); |
| SCOPE_NO_CLEANUPS_P (scope_stmt) = 1; |
| remap_block (scope_stmt, NULL_TREE, id); |
| COMPOUND_BODY (stmt) |
| = chainon (COMPOUND_BODY (stmt), scope_stmt); |
| #else /* INLINER_FOR_JAVA */ |
| if (retvar) |
| { |
| /* Mention the retvar. If the return type of the function was |
| promoted, convert it back to the expected type. */ |
| if (TREE_TYPE (TREE_TYPE (fn)) != TREE_TYPE (retvar)) |
| retvar = build1 (NOP_EXPR, TREE_TYPE (TREE_TYPE (fn)), retvar); |
| BLOCK_EXPR_BODY (expr) |
| = add_stmt_to_compound (BLOCK_EXPR_BODY (expr), |
| TREE_TYPE (retvar), retvar); |
| } |
| |
| java_inlining_merge_static_initializers (fn, id->decl_map); |
| #endif /* INLINER_FOR_JAVA */ |
| |
| /* Clean up. */ |
| splay_tree_delete (id->decl_map); |
| id->decl_map = st; |
| |
| /* The new expression has side-effects if the old one did. */ |
| TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (t); |
| |
| /* Replace the call by the inlined body. Wrap it in an |
| EXPR_WITH_FILE_LOCATION so that we'll get debugging line notes |
| pointing to the right place. */ |
| #ifndef INLINER_FOR_JAVA |
| chain = TREE_CHAIN (*tp); |
| *tp = build_expr_wfl (expr, DECL_SOURCE_FILE (fn), DECL_SOURCE_LINE (fn), |
| /*col=*/0); |
| #else /* INLINER_FOR_JAVA */ |
| *tp = build_expr_wfl (expr, DECL_SOURCE_FILE (fn), |
| DECL_SOURCE_LINE_FIRST(fn), |
| /*col=*/0); |
| #endif /* INLINER_FOR_JAVA */ |
| EXPR_WFL_EMIT_LINE_NOTE (*tp) = 1; |
| #ifndef INLINER_FOR_JAVA |
| TREE_CHAIN (*tp) = chain; |
| #endif /* not INLINER_FOR_JAVA */ |
| pop_srcloc (); |
| |
| /* If the value of the new expression is ignored, that's OK. We |
| don't warn about this for CALL_EXPRs, so we shouldn't warn about |
| the equivalent inlined version either. */ |
| TREE_USED (*tp) = 1; |
| |
| /* Our function now has more statements than it did before. */ |
| DECL_NUM_STMTS (VARRAY_TREE (id->fns, 0)) += DECL_NUM_STMTS (fn); |
| /* For accounting, subtract one for the saved call/ret. */ |
| id->inlined_stmts += DECL_NUM_STMTS (fn) - 1; |
| |
| /* Recurse into the body of the just inlined function. */ |
| expand_calls_inline (inlined_body, id); |
| VARRAY_POP (id->fns); |
| |
| /* If we've returned to the top level, clear out the record of how |
| much inlining has been done. */ |
| if (VARRAY_ACTIVE_SIZE (id->fns) == id->first_inlined_fn) |
| id->inlined_stmts = 0; |
| |
| /* Don't walk into subtrees. We've already handled them above. */ |
| *walk_subtrees = 0; |
| |
| (*lang_hooks.tree_inlining.end_inlining) (fn); |
| |
| /* Keep iterating. */ |
| return NULL_TREE; |
| } |
| /* Walk over the entire tree *TP, replacing CALL_EXPRs with inline |
| expansions as appropriate. */ |
| |
| static void |
| expand_calls_inline (tp, id) |
| tree *tp; |
| inline_data *id; |
| { |
| /* Search through *TP, replacing all calls to inline functions by |
| appropriate equivalents. Use walk_tree in no-duplicates mode |
| to avoid exponential time complexity. (We can't just use |
| walk_tree_without_duplicates, because of the special TARGET_EXPR |
| handling in expand_calls. The hash table is set up in |
| optimize_function. */ |
| walk_tree (tp, expand_call_inline, id, id->tree_pruner); |
| } |
| |
| /* Expand calls to inline functions in the body of FN. */ |
| |
| void |
| optimize_inline_calls (fn) |
| tree fn; |
| { |
| inline_data id; |
| tree prev_fn; |
| |
| |
| /* There is no point in performing inlining if errors have already |
| occurred -- and we might crash if we try to inline invalid |
| code. */ |
| if (errorcount || sorrycount) |
| return; |
| |
| /* Clear out ID. */ |
| memset (&id, 0, sizeof (id)); |
| |
| /* Don't allow recursion into FN. */ |
| VARRAY_TREE_INIT (id.fns, 32, "fns"); |
| VARRAY_PUSH_TREE (id.fns, fn); |
| /* Or any functions that aren't finished yet. */ |
| prev_fn = NULL_TREE; |
| if (current_function_decl) |
| { |
| VARRAY_PUSH_TREE (id.fns, current_function_decl); |
| prev_fn = current_function_decl; |
| } |
| |
| prev_fn = ((*lang_hooks.tree_inlining.add_pending_fn_decls) |
| (&id.fns, prev_fn)); |
| |
| /* Create the stack of TARGET_EXPRs. */ |
| VARRAY_TREE_INIT (id.target_exprs, 32, "target_exprs"); |
| |
| /* Create the list of functions this call will inline. */ |
| VARRAY_TREE_INIT (id.inlined_fns, 32, "inlined_fns"); |
| |
| /* Keep track of the low-water mark, i.e., the point where the first |
| real inlining is represented in ID.FNS. */ |
| id.first_inlined_fn = VARRAY_ACTIVE_SIZE (id.fns); |
| |
| /* Replace all calls to inline functions with the bodies of those |
| functions. */ |
| id.tree_pruner = htab_create (37, htab_hash_pointer, |
| htab_eq_pointer, NULL); |
| expand_calls_inline (&DECL_SAVED_TREE (fn), &id); |
| |
| /* Clean up. */ |
| htab_delete (id.tree_pruner); |
| if (DECL_LANG_SPECIFIC (fn)) |
| { |
| tree ifn = make_tree_vec (VARRAY_ACTIVE_SIZE (id.inlined_fns)); |
| |
| if (VARRAY_ACTIVE_SIZE (id.inlined_fns)) |
| memcpy (&TREE_VEC_ELT (ifn, 0), &VARRAY_TREE (id.inlined_fns, 0), |
| VARRAY_ACTIVE_SIZE (id.inlined_fns) * sizeof (tree)); |
| DECL_INLINED_FNS (fn) = ifn; |
| } |
| } |
| |
| /* FN is a function that has a complete body, and CLONE is a function |
| whose body is to be set to a copy of FN, mapping argument |
| declarations according to the ARG_MAP splay_tree. */ |
| |
| void |
| clone_body (clone, fn, arg_map) |
| tree clone, fn; |
| void *arg_map; |
| { |
| inline_data id; |
| |
| /* Clone the body, as if we were making an inline call. But, remap |
| the parameters in the callee to the parameters of caller. If |
| there's an in-charge parameter, map it to an appropriate |
| constant. */ |
| memset (&id, 0, sizeof (id)); |
| VARRAY_TREE_INIT (id.fns, 2, "fns"); |
| VARRAY_PUSH_TREE (id.fns, clone); |
| VARRAY_PUSH_TREE (id.fns, fn); |
| id.decl_map = (splay_tree)arg_map; |
| |
| /* Cloning is treated slightly differently from inlining. Set |
| CLONING_P so that it's clear which operation we're performing. */ |
| id.cloning_p = true; |
| |
| /* Actually copy the body. */ |
| TREE_CHAIN (DECL_SAVED_TREE (clone)) = copy_body (&id); |
| } |
| |
| /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. |
| FUNC is called with the DATA and the address of each sub-tree. If |
| FUNC returns a non-NULL value, the traversal is aborted, and the |
| value returned by FUNC is returned. If HTAB is non-NULL it is used |
| to record the nodes visited, and to avoid visiting a node more than |
| once. */ |
| |
| tree |
| walk_tree (tp, func, data, htab_) |
| tree *tp; |
| walk_tree_fn func; |
| void *data; |
| void *htab_; |
| { |
| htab_t htab = (htab_t) htab_; |
| enum tree_code code; |
| int walk_subtrees; |
| tree result; |
| |
| #define WALK_SUBTREE(NODE) \ |
| do \ |
| { \ |
| result = walk_tree (&(NODE), func, data, htab); \ |
| if (result) \ |
| return result; \ |
| } \ |
| while (0) |
| |
| #define WALK_SUBTREE_TAIL(NODE) \ |
| do \ |
| { \ |
| tp = & (NODE); \ |
| goto tail_recurse; \ |
| } \ |
| while (0) |
| |
| tail_recurse: |
| /* Skip empty subtrees. */ |
| if (!*tp) |
| return NULL_TREE; |
| |
| if (htab) |
| { |
| void **slot; |
| |
| /* Don't walk the same tree twice, if the user has requested |
| that we avoid doing so. */ |
| slot = htab_find_slot (htab, *tp, INSERT); |
| if (*slot) |
| return NULL_TREE; |
| *slot = *tp; |
| } |
| |
| /* Call the function. */ |
| walk_subtrees = 1; |
| result = (*func) (tp, &walk_subtrees, data); |
| |
| /* If we found something, return it. */ |
| if (result) |
| return result; |
| |
| code = TREE_CODE (*tp); |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Even if we didn't, FUNC may have decided that there was nothing |
| interesting below this point in the tree. */ |
| if (!walk_subtrees) |
| { |
| if (statement_code_p (code) || code == TREE_LIST |
| || (*lang_hooks.tree_inlining.tree_chain_matters_p) (*tp)) |
| /* But we still need to check our siblings. */ |
| WALK_SUBTREE_TAIL (TREE_CHAIN (*tp)); |
| else |
| return NULL_TREE; |
| } |
| |
| /* Handle common cases up front. */ |
| if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)) |
| || TREE_CODE_CLASS (code) == 'r' |
| || TREE_CODE_CLASS (code) == 's') |
| #else /* INLINER_FOR_JAVA */ |
| if (code != EXIT_BLOCK_EXPR |
| && code != SAVE_EXPR |
| && (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)) |
| || TREE_CODE_CLASS (code) == 'r' |
| || TREE_CODE_CLASS (code) == 's')) |
| #endif /* INLINER_FOR_JAVA */ |
| { |
| int i, len; |
| |
| #ifndef INLINER_FOR_JAVA |
| /* Set lineno here so we get the right instantiation context |
| if we call instantiate_decl from inlinable_function_p. */ |
| if (statement_code_p (code) && !STMT_LINENO_FOR_FN_P (*tp)) |
| lineno = STMT_LINENO (*tp); |
| #endif /* not INLINER_FOR_JAVA */ |
| |
| /* Walk over all the sub-trees of this operand. */ |
| len = first_rtl_op (code); |
| /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same. |
| But, we only want to walk once. */ |
| if (code == TARGET_EXPR |
| && TREE_OPERAND (*tp, 3) == TREE_OPERAND (*tp, 1)) |
| --len; |
| /* Go through the subtrees. We need to do this in forward order so |
| that the scope of a FOR_EXPR is handled properly. */ |
| for (i = 0; i < len; ++i) |
| WALK_SUBTREE (TREE_OPERAND (*tp, i)); |
| |
| #ifndef INLINER_FOR_JAVA |
| /* For statements, we also walk the chain so that we cover the |
| entire statement tree. */ |
| if (statement_code_p (code)) |
| { |
| if (code == DECL_STMT |
| && DECL_STMT_DECL (*tp) |
| && DECL_P (DECL_STMT_DECL (*tp))) |
| { |
| /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk |
| into declarations that are just mentioned, rather than |
| declared; they don't really belong to this part of the tree. |
| And, we can see cycles: the initializer for a declaration can |
| refer to the declaration itself. */ |
| WALK_SUBTREE (DECL_INITIAL (DECL_STMT_DECL (*tp))); |
| WALK_SUBTREE (DECL_SIZE (DECL_STMT_DECL (*tp))); |
| WALK_SUBTREE (DECL_SIZE_UNIT (DECL_STMT_DECL (*tp))); |
| } |
| |
| /* This can be tail-recursion optimized if we write it this way. */ |
| WALK_SUBTREE_TAIL (TREE_CHAIN (*tp)); |
| } |
| |
| #endif /* not INLINER_FOR_JAVA */ |
| /* We didn't find what we were looking for. */ |
| return NULL_TREE; |
| } |
| else if (TREE_CODE_CLASS (code) == 'd') |
| { |
| WALK_SUBTREE_TAIL (TREE_TYPE (*tp)); |
| } |
| else if (TREE_CODE_CLASS (code) == 't') |
| { |
| WALK_SUBTREE (TYPE_SIZE (*tp)); |
| WALK_SUBTREE (TYPE_SIZE_UNIT (*tp)); |
| /* Also examine various special fields, below. */ |
| } |
| |
| result = (*lang_hooks.tree_inlining.walk_subtrees) (tp, &walk_subtrees, func, |
| data, htab); |
| if (result || ! walk_subtrees) |
| return result; |
| |
| /* Not one of the easy cases. We must explicitly go through the |
| children. */ |
| switch (code) |
| { |
| case ERROR_MARK: |
| case IDENTIFIER_NODE: |
| case INTEGER_CST: |
| case REAL_CST: |
| case VECTOR_CST: |
| case STRING_CST: |
| case REAL_TYPE: |
| case COMPLEX_TYPE: |
| case VECTOR_TYPE: |
| case VOID_TYPE: |
| case BOOLEAN_TYPE: |
| case UNION_TYPE: |
| case ENUMERAL_TYPE: |
| case BLOCK: |
| case RECORD_TYPE: |
| case CHAR_TYPE: |
| /* None of thse have subtrees other than those already walked |
| above. */ |
| break; |
| |
| case POINTER_TYPE: |
| case REFERENCE_TYPE: |
| WALK_SUBTREE_TAIL (TREE_TYPE (*tp)); |
| break; |
| |
| case TREE_LIST: |
| WALK_SUBTREE (TREE_VALUE (*tp)); |
| WALK_SUBTREE_TAIL (TREE_CHAIN (*tp)); |
| break; |
| |
| case TREE_VEC: |
| { |
| int len = TREE_VEC_LENGTH (*tp); |
| |
| if (len == 0) |
| break; |
| |
| /* Walk all elements but the first. */ |
| while (--len) |
| WALK_SUBTREE (TREE_VEC_ELT (*tp, len)); |
| |
| /* Now walk the first one as a tail call. */ |
| WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp, 0)); |
| } |
| |
| case COMPLEX_CST: |
| WALK_SUBTREE (TREE_REALPART (*tp)); |
| WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp)); |
| |
| case CONSTRUCTOR: |
| WALK_SUBTREE_TAIL (CONSTRUCTOR_ELTS (*tp)); |
| |
| case METHOD_TYPE: |
| WALK_SUBTREE (TYPE_METHOD_BASETYPE (*tp)); |
| /* Fall through. */ |
| |
| case FUNCTION_TYPE: |
| WALK_SUBTREE (TREE_TYPE (*tp)); |
| { |
| tree arg = TYPE_ARG_TYPES (*tp); |
| |
| /* We never want to walk into default arguments. */ |
| for (; arg; arg = TREE_CHAIN (arg)) |
| WALK_SUBTREE (TREE_VALUE (arg)); |
| } |
| break; |
| |
| case ARRAY_TYPE: |
| WALK_SUBTREE (TREE_TYPE (*tp)); |
| WALK_SUBTREE_TAIL (TYPE_DOMAIN (*tp)); |
| |
| case INTEGER_TYPE: |
| WALK_SUBTREE (TYPE_MIN_VALUE (*tp)); |
| WALK_SUBTREE_TAIL (TYPE_MAX_VALUE (*tp)); |
| |
| case OFFSET_TYPE: |
| WALK_SUBTREE (TREE_TYPE (*tp)); |
| WALK_SUBTREE_TAIL (TYPE_OFFSET_BASETYPE (*tp)); |
| |
| #ifdef INLINER_FOR_JAVA |
| case EXIT_BLOCK_EXPR: |
| WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, 1)); |
| |
| case SAVE_EXPR: |
| WALK_SUBTREE_TAIL (TREE_OPERAND (*tp, 0)); |
| #endif /* INLINER_FOR_JAVA */ |
| |
| default: |
| abort (); |
| } |
| |
| /* We didn't find what we were looking for. */ |
| return NULL_TREE; |
| |
| #undef WALK_SUBTREE |
| #undef WALK_SUBTREE_TAIL |
| } |
| |
| /* Like walk_tree, but does not walk duplicate nodes more than |
| once. */ |
| |
| tree |
| walk_tree_without_duplicates (tp, func, data) |
| tree *tp; |
| walk_tree_fn func; |
| void *data; |
| { |
| tree result; |
| htab_t htab; |
| |
| htab = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL); |
| result = walk_tree (tp, func, data, htab); |
| htab_delete (htab); |
| return result; |
| } |
| |
| /* Passed to walk_tree. Copies the node pointed to, if appropriate. */ |
| |
| tree |
| copy_tree_r (tp, walk_subtrees, data) |
| tree *tp; |
| int *walk_subtrees; |
| void *data ATTRIBUTE_UNUSED; |
| { |
| enum tree_code code = TREE_CODE (*tp); |
| |
| /* We make copies of most nodes. */ |
| if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)) |
| || TREE_CODE_CLASS (code) == 'r' |
| || TREE_CODE_CLASS (code) == 'c' |
| || TREE_CODE_CLASS (code) == 's' |
| || code == TREE_LIST |
| || code == TREE_VEC |
| || (*lang_hooks.tree_inlining.tree_chain_matters_p) (*tp)) |
| { |
| /* Because the chain gets clobbered when we make a copy, we save it |
| here. */ |
| tree chain = TREE_CHAIN (*tp); |
| |
| /* Copy the node. */ |
| *tp = copy_node (*tp); |
| |
| /* Now, restore the chain, if appropriate. That will cause |
| walk_tree to walk into the chain as well. */ |
| if (code == PARM_DECL || code == TREE_LIST |
| #ifndef INLINER_FOR_JAVA |
| || (*lang_hooks.tree_inlining.tree_chain_matters_p) (*tp) |
| || statement_code_p (code)) |
| TREE_CHAIN (*tp) = chain; |
| |
| /* For now, we don't update BLOCKs when we make copies. So, we |
| have to nullify all scope-statements. */ |
| if (TREE_CODE (*tp) == SCOPE_STMT) |
| SCOPE_STMT_BLOCK (*tp) = NULL_TREE; |
| #else /* INLINER_FOR_JAVA */ |
| || (*lang_hooks.tree_inlining.tree_chain_matters_p) (*tp)) |
| TREE_CHAIN (*tp) = chain; |
| #endif /* INLINER_FOR_JAVA */ |
| } |
| else if (TREE_CODE_CLASS (code) == 't' && !variably_modified_type_p (*tp)) |
| /* Types only need to be copied if they are variably modified. */ |
| *walk_subtrees = 0; |
| |
| return NULL_TREE; |
| } |
| |
| /* The SAVE_EXPR pointed to by TP is being copied. If ST contains |
| information indicating to what new SAVE_EXPR this one should be |
| mapped, use that one. Otherwise, create a new node and enter it in |
| ST. FN is the function into which the copy will be placed. */ |
| |
| void |
| remap_save_expr (tp, st_, fn, walk_subtrees) |
| tree *tp; |
| void *st_; |
| tree fn; |
| int *walk_subtrees; |
| { |
| splay_tree st = (splay_tree) st_; |
| splay_tree_node n; |
| |
| /* See if we already encountered this SAVE_EXPR. */ |
| n = splay_tree_lookup (st, (splay_tree_key) *tp); |
| |
| /* If we didn't already remap this SAVE_EXPR, do so now. */ |
| if (!n) |
| { |
| tree t = copy_node (*tp); |
| |
| /* The SAVE_EXPR is now part of the function into which we |
| are inlining this body. */ |
| SAVE_EXPR_CONTEXT (t) = fn; |
| /* And we haven't evaluated it yet. */ |
| SAVE_EXPR_RTL (t) = NULL_RTX; |
| /* Remember this SAVE_EXPR. */ |
| n = splay_tree_insert (st, |
| (splay_tree_key) *tp, |
| (splay_tree_value) t); |
| /* Make sure we don't remap an already-remapped SAVE_EXPR. */ |
| splay_tree_insert (st, (splay_tree_key) t, |
| (splay_tree_value) error_mark_node); |
| } |
| else |
| /* We've already walked into this SAVE_EXPR, so we needn't do it |
| again. */ |
| *walk_subtrees = 0; |
| |
| /* Replace this SAVE_EXPR with the copy. */ |
| *tp = (tree) n->value; |
| } |
| |
| #ifdef INLINER_FOR_JAVA |
| /* Add STMT to EXISTING if possible, otherwise create a new |
| COMPOUND_EXPR and add STMT to it. */ |
| |
| static tree |
| add_stmt_to_compound (existing, type, stmt) |
| tree existing, type, stmt; |
| { |
| if (!stmt) |
| return existing; |
| else if (existing) |
| return build (COMPOUND_EXPR, type, existing, stmt); |
| else |
| return stmt; |
| } |
| |
| #endif /* INLINER_FOR_JAVA */ |