gcc/testsuite/lib/target-supports-dg.exp - gcc - Git at Google

 #   Copyright (C) 1997-2021 Free Software Foundation, Inc.

 # This program 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 3 of the License, or
 # (at your option) any later version.
 #
 # This program 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 GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.

 # DejaGnu's dg-test defines extra flags that are used to compile a test.
 # Access them for directives that need to examine all options that are
 # used for a test, including checks for non-cached effective targets.
 # We don't know how far up the call chain it is but we know we'll hit
 # it eventually, and that we're at least 3 calls down.

 proc current_compiler_flags { } {
     set frames 2
     while { ![info exists flags1] } {
 	set frames [expr $frames + 1]
 	upvar $frames dg-extra-tool-flags flags1
     }
     upvar $frames tool_flags flags2
     return "$flags1 $flags2"
 }

 # DejaGnu's dg-test defines a test name that includes torture options
 # which is used in most pass/fail messages.  Grab a copy of it.

 proc testname-for-summary { } {
     global testname_with_flags

     # A variable called "name" is too generic, so identify dg-test by
     # the existence of dg-extra-tool-flags.
     if ![info exists testname_with_flags] {
 	set frames 2
 	while { ![info exists flags] } {
 	    set frames [expr $frames + 1]
 	    upvar $frames dg-extra-tool-flags flags
 	}

 	# We've got the stack level for dg-test; get the variable we want.
 	upvar $frames name name
 	set testname_with_flags $name

 	# If there are flags, add an extra space to improve readability of
 	# the test summary.
 	if { [llength $testname_with_flags] > 1 } {
 	    set testname_with_flags "$testname_with_flags "
 	}
     }
     return "$testname_with_flags"
 }

 # If this target does not support weak symbols, skip this test.

 proc dg-require-weak { args } {
     set weak_available [ check_weak_available ]
     if { $weak_available == -1 } {
 	upvar name name
 	unresolved "$name"
     }
     if { $weak_available != 1 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support overriding weak symbols, skip this
 # test.

 proc dg-require-weak-override { args } {
     set weak_override_available [ check_weak_override_available ]
     if { $weak_override_available == -1 } {
 	upvar name name
 	unresolved "$name"
     }
     if { $weak_override_available != 1 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support the "visibility" attribute, skip this
 # test.

 proc dg-require-visibility { args } {
     set visibility_available [ check_visibility_available [lindex $args 1 ] ]
     if { $visibility_available == -1 } {
 	upvar name name
 	unresolved "$name"
     }
     if { $visibility_available != 1 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support the "alias" attribute, skip this
 # test.

 proc dg-require-alias { args } {
     set alias_available [ check_alias_available ]
     if { $alias_available == -1 } {
 	upvar name name
 	unresolved "$name"
     }
     if { $alias_available < 2 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support the "ifunc" attribute, skip this
 # test.

 proc dg-require-ifunc { args } {
     if { ![ check_ifunc_available ] } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target's linker does not support the --gc-sections flag,
 # skip this test.

 proc dg-require-gc-sections { args } {
     if { ![ check_gc_sections_available ] } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support profiling, skip this test.

 proc dg-require-profiling { args } {
     if { ![ check_profiling_available [lindex $args 1] ] } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support DLL attributes skip this test.

 proc dg-require-dll { args } {
     # As a special case, the mcore-*-elf supports these attributes.
     # All Symbian OS targets also support these attributes.
     if { [istarget mcore-*-elf]
          || [istarget *-*-symbianelf] } {
 	return
     }
     # PE/COFF targets support dllimport/dllexport.
     if { [gcc_target_object_format] == "pe" } {
 	return
     }

     upvar dg-do-what dg-do-what
     set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
 }

 # If this host does not support an ASCII locale, skip this test.

 proc dg-require-ascii-locale { args } {
     if { ![ check_ascii_locale_available] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 proc dg-require-iconv { args } {
     if { ![ check_iconv_available ${args} ] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this host does not have "dot", skip this test.

 proc dg-require-dot { args } {
     verbose "dg-require-dot" 2
     if { ![ check_dot_available ] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not have sufficient stack size, skip this test.

 proc dg-require-stack-size { args } {
     if { ![is-effective-target stack_size] } {
 	return
     }

     set stack_size [dg-effective-target-value stack_size]
     set required [expr [lindex $args 1]]
     if { $stack_size < $required } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support named sections skip this test.

 proc dg-require-named-sections { args } {
     if { ![ check_named_sections_available ] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If the target does not match the required effective target, skip this test.
 # Only apply this if the optional selector matches.

 proc dg-require-effective-target { args } {
     set args [lreplace $args 0 0]
     # Verify the number of arguments.  The last is optional.
     if { [llength $args] < 1 || [llength $args] > 2 } {
 	error "syntax error, need a single effective-target keyword with optional selector"
     }

     # Don't bother if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     # Evaluate selector if present.
     if { [llength $args] == 2 } {
 	switch [dg-process-target-1 [lindex $args 1]] {
 	    "S" { }
 	    "N" { return }
 	}
     }

     if { ![is-effective-target [lindex $args 0]] } {
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not have fork, skip this test.

 proc dg-require-fork { args } {
     if { ![check_fork_available] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not have mkfifo, skip this test.

 proc dg-require-mkfifo { args } {
     if { ![check_mkfifo_available] } {
 	upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not use __cxa_atexit, skip this test.

 proc dg-require-cxa-atexit { args } {
     if { ![ check_cxa_atexit_available ] } {
         upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If the host is remote rather than the same as the build system, skip
 # this test.  Some tests are incompatible with DejaGnu's handling of
 # remote hosts, which involves copying the source file to the host and
 # compiling it with a relative path and "-o a.out".

 proc dg-require-host-local { args } {
     if [ is_remote host ] {
         upvar dg-do-what dg-do-what
         set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 proc dg-require-linker-plugin { args } {
     set linker_plugin_available [ check_linker_plugin_available ]
     if { $linker_plugin_available == 0 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # If this target does not support the "stack-check" option, skip this
 # test.

 proc dg-require-stack-check { args } {
     set stack_check_available [ check_stack_check_available [lindex $args 1 ] ]
     if { $stack_check_available == -1 } {
 	upvar name name
 	unresolved "$name"
     }
     if { $stack_check_available != 1 } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }

 # Add any target-specific flags needed for accessing the given list
 # of features.  This must come after all dg-options.

 proc dg-add-options { args } {
     upvar dg-extra-tool-flags extra-tool-flags

     foreach arg [lrange $args 1 end] {
 	if { [info procs add_options_for_$arg] != "" } {
 	    set extra-tool-flags \
 		[eval [list add_options_for_$arg ${extra-tool-flags}]]
 	} else {
 	    error "Unrecognized option type: $arg"
 	}
     }
 }

 # Compare flags for a test directive against flags that will be used to
 # compile the test: multilib flags, flags for torture options, and either
 # the default flags for this group of tests or flags specified with a
 # previous dg-options directive.

 proc check-flags { args } {
     global compiler_flags
     global TOOL_OPTIONS
     global TEST_ALWAYS_FLAGS

     # The args are within another list; pull them out.
     set args [lindex $args 0]

     # Start the list with a dummy tool name so the list will match "*"
     # if there are no flags.
     set compiler_flags " toolname "
     append compiler_flags [current_compiler_flags]
     # If running a subset of the test suite, $TOOL_OPTIONS may not exist.
     catch {append compiler_flags " $TOOL_OPTIONS "}
     # If running a subset of the test suite, $TEST_ALWAYS_FLAGS may not exist.
     catch {append compiler_flags " $TEST_ALWAYS_FLAGS "}
     set dest [target_info name]
     if [board_info $dest exists cflags] {
 	append compiler_flags "[board_info $dest cflags] "
     }
     if [board_info $dest exists multilib_flags] {
 	append compiler_flags "[board_info $dest multilib_flags] "
     }

     # The next two arguments are optional.  If they were not specified,
     # use the defaults.
     if { [llength $args] == 2 } {
 	lappend $args [list "*"]
     }
     if { [llength $args] == 3 } {
 	lappend $args [list ""]
     }

     # If the option strings are the defaults, or the same as the
     # defaults, there is no need to call check_conditional_xfail to
     # compare them to the actual options.
     if { [string compare [lindex $args 2] "*"] == 0
 	 && [string compare [lindex $args 3] "" ] == 0 } {
 	set result 1
     } else {
 	# The target list might be an effective-target keyword, so replace
 	# the original list with "*-*-*", since we already know it matches.
 	set result [check_conditional_xfail [lreplace $args 1 1 "*-*-*"]]
     }

     # Any value in this variable was left over from an earlier test.
     set compiler_flags ""

     return $result
 }

 # Skip the test (report it as UNSUPPORTED) if the target list and
 # included flags are matched and the excluded flags are not matched.
 #
 # The first argument is the line number of the dg-skip-if directive
 # within the test file.   Remaining arguments are as for xfail lists:
 # message { targets } { include } { exclude }
 #
 # This tests against multilib flags plus either the default flags for this
 # group of tests or flags specified with a previous dg-options command.

 proc dg-skip-if { args } {
     # Verify the number of arguments.  The last two are optional.
     set args [lreplace $args 0 0]
     if { [llength $args] < 2 || [llength $args] > 4 } {
 	error "dg-skip-if 2: need 2, 3, or 4 arguments"
     }

     # Don't bother if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     set selector [list target [lindex $args 1]]
     if { [dg-process-target-1 $selector] == "S" } {
 	if [check-flags $args] {
 	    upvar dg-do-what dg-do-what
             set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
 	}
     }
 }

 # Like check_conditional_xfail, but callable from a dg test.

 proc dg-xfail-if { args } {
     # Verify the number of arguments.  The last three are optional.
     set args [lreplace $args 0 0]
     if { [llength $args] < 2 || [llength $args] > 4 } {
 	error "dg-xfail-if: need 2, 3, or 4 arguments"
     }

     # Don't change anything if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     set selector [list target [lindex $args 1]]
     if { [dg-process-target-1 $selector] == "S" } {
 	global compiler_conditional_xfail_data

 	# The target list might be an effective-target keyword.  Replace
 	# the original list with "*-*-*", since we already know it matches.
 	set args [lreplace $args 1 1 "*-*-*"]

 	# Supply default values for unspecified optional arguments.
 	if { [llength $args] == 2 } {
 	    lappend $args [list "*"]
 	}
 	if { [llength $args] == 3 } {
 	    lappend $args [list ""]
 	}

 	set compiler_conditional_xfail_data $args
     }
 }

 # Like dg-xfail-if but for the execute step.

 proc dg-xfail-run-if { args } {
     # Verify the number of arguments.  The last two are optional.
     set args [lreplace $args 0 0]
     if { [llength $args] < 2 || [llength $args] > 4 } {
 	error "dg-xfail-run-if: need 2, 3, or 4 arguments"
     }

     # Don't bother if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     set selector [list target [lindex $args 1]]
     if { [dg-process-target-1 $selector] == "S" } {
 	if [check-flags $args] {
 	    upvar dg-do-what dg-do-what
             set dg-do-what [list [lindex ${dg-do-what} 0] "S" "F"]
 	}
     }
 }

 # Record whether the program is expected to return a nonzero status.

 set shouldfail 0

 proc dg-shouldfail { args } {
     # Don't bother if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     global shouldfail

     set args [lreplace $args 0 0]
     if { [llength $args] > 1 } {
 	set selector [list target [lindex $args 1]]
 	if { [dg-process-target-1 $selector] == "S" } {
 	    # The target matches, now check the flags.
 	    if [check-flags $args] {
 		set shouldfail 1
 	    }
 	}
     } else {
 	set shouldfail 1
     }
 }

 # Record whether the compiler is expected (at the moment) to ICE.
 # Used for tests that test bugs that have not been fixed yet.

 set expect_ice 0

 proc dg-ice { args } {
     # Don't bother if we're already skipping the test.
     upvar dg-do-what dg-do-what
     if { [lindex ${dg-do-what} 1] == "N" } {
       return
     }

     global expect_ice

     set args [lreplace $args 0 0]
     if { [llength $args] > 1 } {
 	set selector [list target [lindex $args 1]]
 	if { [dg-process-target-1 $selector] == "S" } {
 	    # The target matches, now check the flags.
 	    if [check-flags $args] {
 		set expect_ice 1
 	    }
 	}
     } else {
 	set expect_ice 1
     }
 }

 # Intercept the call to the DejaGnu version of dg-process-target to
 # support use of an effective-target keyword in place of a list of
 # target triplets to xfail or skip a test.
 #
 # The argument to dg-process-target is the keyword "target" or "xfail"
 # followed by a selector:
 #    target-triplet-1 ...
 #    effective-target-keyword
 #    selector-expression
 #
 # For a target list the result is "S" if the target is selected, "N" otherwise.
 # For an xfail list the result is "F" if the target is affected, "P" otherwise.

 # In contexts that allow either "target" or "xfail" the argument can be
 #    target selector1 xfail selector2
 # which returns "N" if selector1 is not selected, otherwise the result of
 # "xfail selector2".
 #
 # A selector expression appears within curly braces and uses a single logical
 # operator: !, &&, or ||.  An operand is another selector expression, an
 # effective-target keyword, or a list of target triplets within quotes or
 # curly braces.

 if { [info procs saved-dg-process-target] == [list] } {
     rename dg-process-target saved-dg-process-target

     # Evaluate an operand within a selector expression.
     proc selector_opd { op } {
 	set selector "target"
 	lappend selector $op
 	set answer [ expr { [dg-process-target $selector] == "S" } ]
 	verbose "selector_opd: `$op' $answer" 2
 	return $answer
     }

     # Evaluate a target triplet list within a selector expression.
     # Unlike other operands, this needs to be expanded from a list to
     # the same string as "target".
     proc selector_list { op } {
 	set selector "target [join $op]"
 	set answer [ expr { [dg-process-target $selector] == "S" } ]
 	verbose "selector_list: `$op' $answer" 2
 	return $answer
     }

     # Evaluate a selector expression.
     proc selector_expression { exp } {
 	if { [llength $exp] >= 2
 	     && [string match "any-opts" [lindex $exp 0]] } {
 	    set args [list "" { *-*-* } [lrange $exp 1 end] ""]
 	    set answer [check_conditional_xfail $args]
 	} elseif { [llength $exp] >= 2
 		   && [string match "no-opts" [lindex $exp 0]] } {
 	    set args [list "" { *-*-* } "*" [lrange $exp 1 end]]
 	    set answer [check_conditional_xfail $args]
 	} elseif { [llength $exp] == 2 } {
 	    if [string match "!" [lindex $exp 0]] {
 		set op1 [lindex $exp 1]
 		set answer [expr { ! [selector_opd $op1] }]
 	    } else {
 		# Assume it's a list of target triplets.
 		set answer [selector_list $exp]
 	    }
 	} elseif { [llength $exp] == 3 } {
 	    set op1 [lindex $exp 0]
 	    set opr [lindex $exp 1]
 	    set op2 [lindex $exp 2]
 	    if [string match "&&" $opr] {
 		set answer [expr { [selector_opd $op1] && [selector_opd $op2] }]
 	    } elseif [string match "||" $opr] {
 		set answer [expr { [selector_opd $op1] || [selector_opd $op2] }]
 	    } else {
 		# Assume it's a list of target triplets.
 		set answer [selector_list $exp]
 	    }
 	} else {
 	    # Assume it's a list of target triplets.
 	    set answer [selector_list $exp]
 	}

 	verbose "selector_expression: `$exp' $answer" 2
 	return $answer
     }

     # Evaluate "target selector" or "xfail selector".

     proc dg-process-target-1 { args } {
 	verbose "dg-process-target-1: `$args'" 2

 	# Extract the 'what' keyword from the argument list.
 	set selector [string trim [lindex $args 0]]
 	if [regexp "^xfail " $selector] {
 	    set what "xfail"
 	} elseif [regexp "^target " $selector] {
 	    set what "target"
 	} else {
 	    error "syntax error in target selector \"$selector\""
 	}

 	# Extract the rest of the list, which might be a keyword.
 	regsub "^${what}" $selector "" rest
 	set rest [string trim $rest]

 	if [is-effective-target-keyword $rest] {
 	    # The selector is an effective target keyword.
 	    if [is-effective-target $rest] {
 		return [expr { $what == "xfail" ? "F" : "S" }]
 	    } else {
 		return [expr { $what == "xfail" ? "P" : "N" }]
 	    }
 	}

 	if [string match "{*}" $rest] {
 	    if [selector_expression [lindex $rest 0]] {
 		return [expr { $what == "xfail" ? "F" : "S" }]
 	    } else {
 		return [expr { $what == "xfail" ? "P" : "N" }]
 	    }
 	}

 	# The selector is not an effective-target keyword, so process
 	# the list of target triplets.
 	return [saved-dg-process-target $selector]
     }

     # Intercept calls to the DejaGnu function.  In addition to
     # processing "target selector" or "xfail selector", handle
     # "target selector1 xfail selector2".

     proc dg-process-target { args } {
 	verbose "replacement dg-process-target: `$args'" 2

 	set selector [string trim [lindex $args 0]]

 	# If the argument list contains both 'target' and 'xfail',
 	# process 'target' and, if that succeeds, process 'xfail'.
 	if [regexp "^target .* xfail .*" $selector] {
 	    set xfail_index [string first "xfail" $selector]
 	    set xfail_selector [string range $selector $xfail_index end]
 	    set target_selector [string range $selector 0 [expr $xfail_index-1]]
 	    set target_selector [string trim $target_selector]
 	    if { [dg-process-target-1 $target_selector] == "N" } {
 		return "N"
 	    }
 	    return [dg-process-target-1 $xfail_selector]

 	}
 	return [dg-process-target-1 $selector]
     }
 }

 # If this target does not support the "symver" attribute, skip this
 # test.

 proc dg-require-symver { args } {
     if { ![ check_symver_available ] } {
 	upvar dg-do-what dg-do-what
 	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
     }
 }
	# Copyright (C) 1997-2021 Free Software Foundation, Inc.

	# This program 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 3 of the License, or
	# (at your option) any later version.
	#
	# This program 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 GCC; see the file COPYING3. If not see
	# <http://www.gnu.org/licenses/>.

	# DejaGnu's dg-test defines extra flags that are used to compile a test.
	# Access them for directives that need to examine all options that are
	# used for a test, including checks for non-cached effective targets.
	# We don't know how far up the call chain it is but we know we'll hit
	# it eventually, and that we're at least 3 calls down.

	proc current_compiler_flags { } {
	set frames 2
	while { ![info exists flags1] } {
	set frames [expr $frames + 1]
	upvar $frames dg-extra-tool-flags flags1
	}
	upvar $frames tool_flags flags2
	return "$flags1 $flags2"
	}

	# DejaGnu's dg-test defines a test name that includes torture options
	# which is used in most pass/fail messages. Grab a copy of it.

	proc testname-for-summary { } {
	global testname_with_flags

	# A variable called "name" is too generic, so identify dg-test by
	# the existence of dg-extra-tool-flags.
	if ![info exists testname_with_flags] {
	set frames 2
	while { ![info exists flags] } {
	set frames [expr $frames + 1]
	upvar $frames dg-extra-tool-flags flags
	}

	# We've got the stack level for dg-test; get the variable we want.
	upvar $frames name name
	set testname_with_flags $name

	# If there are flags, add an extra space to improve readability of
	# the test summary.
	if { [llength $testname_with_flags] > 1 } {
	set testname_with_flags "$testname_with_flags "
	}
	}
	return "$testname_with_flags"
	}

	# If this target does not support weak symbols, skip this test.

	proc dg-require-weak { args } {
	set weak_available [ check_weak_available ]
	if { $weak_available == -1 } {
	upvar name name
	unresolved "$name"
	}
	if { $weak_available != 1 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support overriding weak symbols, skip this
	# test.

	proc dg-require-weak-override { args } {
	set weak_override_available [ check_weak_override_available ]
	if { $weak_override_available == -1 } {
	upvar name name
	unresolved "$name"
	}
	if { $weak_override_available != 1 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support the "visibility" attribute, skip this
	# test.

	proc dg-require-visibility { args } {
	set visibility_available [ check_visibility_available [lindex $args 1 ] ]
	if { $visibility_available == -1 } {
	upvar name name
	unresolved "$name"
	}
	if { $visibility_available != 1 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support the "alias" attribute, skip this
	# test.

	proc dg-require-alias { args } {
	set alias_available [ check_alias_available ]
	if { $alias_available == -1 } {
	upvar name name
	unresolved "$name"
	}
	if { $alias_available < 2 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support the "ifunc" attribute, skip this
	# test.

	proc dg-require-ifunc { args } {
	if { ![ check_ifunc_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target's linker does not support the --gc-sections flag,
	# skip this test.

	proc dg-require-gc-sections { args } {
	if { ![ check_gc_sections_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support profiling, skip this test.

	proc dg-require-profiling { args } {
	if { ![ check_profiling_available [lindex $args 1] ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support DLL attributes skip this test.

	proc dg-require-dll { args } {
	# As a special case, the mcore-*-elf supports these attributes.
	# All Symbian OS targets also support these attributes.
	if { [istarget mcore-*-elf]
	\|\| [istarget --symbianelf] } {
	return
	}
	# PE/COFF targets support dllimport/dllexport.
	if { [gcc_target_object_format] == "pe" } {
	return
	}

	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}

	# If this host does not support an ASCII locale, skip this test.

	proc dg-require-ascii-locale { args } {
	if { ![ check_ascii_locale_available] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	proc dg-require-iconv { args } {
	if { ![ check_iconv_available ${args} ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this host does not have "dot", skip this test.

	proc dg-require-dot { args } {
	verbose "dg-require-dot" 2
	if { ![ check_dot_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not have sufficient stack size, skip this test.

	proc dg-require-stack-size { args } {
	if { ![is-effective-target stack_size] } {
	return
	}

	set stack_size [dg-effective-target-value stack_size]
	set required [expr [lindex $args 1]]
	if { $stack_size < $required } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support named sections skip this test.

	proc dg-require-named-sections { args } {
	if { ![ check_named_sections_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If the target does not match the required effective target, skip this test.
	# Only apply this if the optional selector matches.

	proc dg-require-effective-target { args } {
	set args [lreplace $args 0 0]
	# Verify the number of arguments. The last is optional.
	if { [llength $args] < 1 \|\| [llength $args] > 2 } {
	error "syntax error, need a single effective-target keyword with optional selector"
	}

	# Don't bother if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	# Evaluate selector if present.
	if { [llength $args] == 2 } {
	switch [dg-process-target-1 [lindex $args 1]] {
	"S" { }
	"N" { return }
	}
	}

	if { ![is-effective-target [lindex $args 0]] } {
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not have fork, skip this test.

	proc dg-require-fork { args } {
	if { ![check_fork_available] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not have mkfifo, skip this test.

	proc dg-require-mkfifo { args } {
	if { ![check_mkfifo_available] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not use __cxa_atexit, skip this test.

	proc dg-require-cxa-atexit { args } {
	if { ![ check_cxa_atexit_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If the host is remote rather than the same as the build system, skip
	# this test. Some tests are incompatible with DejaGnu's handling of
	# remote hosts, which involves copying the source file to the host and
	# compiling it with a relative path and "-o a.out".

	proc dg-require-host-local { args } {
	if [ is_remote host ] {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	proc dg-require-linker-plugin { args } {
	set linker_plugin_available [ check_linker_plugin_available ]
	if { $linker_plugin_available == 0 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# If this target does not support the "stack-check" option, skip this
	# test.

	proc dg-require-stack-check { args } {
	set stack_check_available [ check_stack_check_available [lindex $args 1 ] ]
	if { $stack_check_available == -1 } {
	upvar name name
	unresolved "$name"
	}
	if { $stack_check_available != 1 } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}

	# Add any target-specific flags needed for accessing the given list
	# of features. This must come after all dg-options.

	proc dg-add-options { args } {
	upvar dg-extra-tool-flags extra-tool-flags

	foreach arg [lrange $args 1 end] {
	if { [info procs add_options_for_$arg] != "" } {
	set extra-tool-flags \
	[eval [list add_options_for_$arg ${extra-tool-flags}]]
	} else {
	error "Unrecognized option type: $arg"
	}
	}
	}

	# Compare flags for a test directive against flags that will be used to
	# compile the test: multilib flags, flags for torture options, and either
	# the default flags for this group of tests or flags specified with a
	# previous dg-options directive.

	proc check-flags { args } {
	global compiler_flags
	global TOOL_OPTIONS
	global TEST_ALWAYS_FLAGS

	# The args are within another list; pull them out.
	set args [lindex $args 0]

	# Start the list with a dummy tool name so the list will match "*"
	# if there are no flags.
	set compiler_flags " toolname "
	append compiler_flags [current_compiler_flags]
	# If running a subset of the test suite, $TOOL_OPTIONS may not exist.
	catch {append compiler_flags " $TOOL_OPTIONS "}
	# If running a subset of the test suite, $TEST_ALWAYS_FLAGS may not exist.
	catch {append compiler_flags " $TEST_ALWAYS_FLAGS "}
	set dest [target_info name]
	if [board_info $dest exists cflags] {
	append compiler_flags "[board_info $dest cflags] "
	}
	if [board_info $dest exists multilib_flags] {
	append compiler_flags "[board_info $dest multilib_flags] "
	}

	# The next two arguments are optional. If they were not specified,
	# use the defaults.
	if { [llength $args] == 2 } {
	lappend $args [list "*"]
	}
	if { [llength $args] == 3 } {
	lappend $args [list ""]
	}

	# If the option strings are the defaults, or the same as the
	# defaults, there is no need to call check_conditional_xfail to
	# compare them to the actual options.
	if { [string compare [lindex $args 2] "*"] == 0
	&& [string compare [lindex $args 3] "" ] == 0 } {
	set result 1
	} else {
	# The target list might be an effective-target keyword, so replace
	# the original list with "--*", since we already know it matches.
	set result [check_conditional_xfail [lreplace $args 1 1 "--*"]]
	}

	# Any value in this variable was left over from an earlier test.
	set compiler_flags ""

	return $result
	}

	# Skip the test (report it as UNSUPPORTED) if the target list and
	# included flags are matched and the excluded flags are not matched.
	#
	# The first argument is the line number of the dg-skip-if directive
	# within the test file. Remaining arguments are as for xfail lists:
	# message { targets } { include } { exclude }
	#
	# This tests against multilib flags plus either the default flags for this
	# group of tests or flags specified with a previous dg-options command.

	proc dg-skip-if { args } {
	# Verify the number of arguments. The last two are optional.
	set args [lreplace $args 0 0]
	if { [llength $args] < 2 \|\| [llength $args] > 4 } {
	error "dg-skip-if 2: need 2, 3, or 4 arguments"
	}

	# Don't bother if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	set selector [list target [lindex $args 1]]
	if { [dg-process-target-1 $selector] == "S" } {
	if [check-flags $args] {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}
	}

	# Like check_conditional_xfail, but callable from a dg test.

	proc dg-xfail-if { args } {
	# Verify the number of arguments. The last three are optional.
	set args [lreplace $args 0 0]
	if { [llength $args] < 2 \|\| [llength $args] > 4 } {
	error "dg-xfail-if: need 2, 3, or 4 arguments"
	}

	# Don't change anything if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	set selector [list target [lindex $args 1]]
	if { [dg-process-target-1 $selector] == "S" } {
	global compiler_conditional_xfail_data

	# The target list might be an effective-target keyword. Replace
	# the original list with "--*", since we already know it matches.
	set args [lreplace $args 1 1 "--*"]

	# Supply default values for unspecified optional arguments.
	if { [llength $args] == 2 } {
	lappend $args [list "*"]
	}
	if { [llength $args] == 3 } {
	lappend $args [list ""]
	}

	set compiler_conditional_xfail_data $args
	}
	}

	# Like dg-xfail-if but for the execute step.

	proc dg-xfail-run-if { args } {
	# Verify the number of arguments. The last two are optional.
	set args [lreplace $args 0 0]
	if { [llength $args] < 2 \|\| [llength $args] > 4 } {
	error "dg-xfail-run-if: need 2, 3, or 4 arguments"
	}

	# Don't bother if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	set selector [list target [lindex $args 1]]
	if { [dg-process-target-1 $selector] == "S" } {
	if [check-flags $args] {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "S" "F"]
	}
	}
	}

	# Record whether the program is expected to return a nonzero status.

	set shouldfail 0

	proc dg-shouldfail { args } {
	# Don't bother if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	global shouldfail

	set args [lreplace $args 0 0]
	if { [llength $args] > 1 } {
	set selector [list target [lindex $args 1]]
	if { [dg-process-target-1 $selector] == "S" } {
	# The target matches, now check the flags.
	if [check-flags $args] {
	set shouldfail 1
	}
	}
	} else {
	set shouldfail 1
	}
	}

	# Record whether the compiler is expected (at the moment) to ICE.
	# Used for tests that test bugs that have not been fixed yet.

	set expect_ice 0

	proc dg-ice { args } {
	# Don't bother if we're already skipping the test.
	upvar dg-do-what dg-do-what
	if { [lindex ${dg-do-what} 1] == "N" } {
	return
	}

	global expect_ice

	set args [lreplace $args 0 0]
	if { [llength $args] > 1 } {
	set selector [list target [lindex $args 1]]
	if { [dg-process-target-1 $selector] == "S" } {
	# The target matches, now check the flags.
	if [check-flags $args] {
	set expect_ice 1
	}
	}
	} else {
	set expect_ice 1
	}
	}

	# Intercept the call to the DejaGnu version of dg-process-target to
	# support use of an effective-target keyword in place of a list of
	# target triplets to xfail or skip a test.
	#
	# The argument to dg-process-target is the keyword "target" or "xfail"
	# followed by a selector:
	# target-triplet-1 ...
	# effective-target-keyword
	# selector-expression
	#
	# For a target list the result is "S" if the target is selected, "N" otherwise.
	# For an xfail list the result is "F" if the target is affected, "P" otherwise.

	# In contexts that allow either "target" or "xfail" the argument can be
	# target selector1 xfail selector2
	# which returns "N" if selector1 is not selected, otherwise the result of
	# "xfail selector2".
	#
	# A selector expression appears within curly braces and uses a single logical
	# operator: !, &&, or \|\|. An operand is another selector expression, an
	# effective-target keyword, or a list of target triplets within quotes or
	# curly braces.

	if { [info procs saved-dg-process-target] == [list] } {
	rename dg-process-target saved-dg-process-target

	# Evaluate an operand within a selector expression.
	proc selector_opd { op } {
	set selector "target"
	lappend selector $op
	set answer [ expr { [dg-process-target $selector] == "S" } ]
	verbose "selector_opd: `$op' $answer" 2
	return $answer
	}

	# Evaluate a target triplet list within a selector expression.
	# Unlike other operands, this needs to be expanded from a list to
	# the same string as "target".
	proc selector_list { op } {
	set selector "target [join $op]"
	set answer [ expr { [dg-process-target $selector] == "S" } ]
	verbose "selector_list: `$op' $answer" 2
	return $answer
	}

	# Evaluate a selector expression.
	proc selector_expression { exp } {
	if { [llength $exp] >= 2
	&& [string match "any-opts" [lindex $exp 0]] } {
	set args [list "" { --* } [lrange $exp 1 end] ""]
	set answer [check_conditional_xfail $args]
	} elseif { [llength $exp] >= 2
	&& [string match "no-opts" [lindex $exp 0]] } {
	set args [list "" { --* } "*" [lrange $exp 1 end]]
	set answer [check_conditional_xfail $args]
	} elseif { [llength $exp] == 2 } {
	if [string match "!" [lindex $exp 0]] {
	set op1 [lindex $exp 1]
	set answer [expr { ! [selector_opd $op1] }]
	} else {
	# Assume it's a list of target triplets.
	set answer [selector_list $exp]
	}
	} elseif { [llength $exp] == 3 } {
	set op1 [lindex $exp 0]
	set opr [lindex $exp 1]
	set op2 [lindex $exp 2]
	if [string match "&&" $opr] {
	set answer [expr { [selector_opd $op1] && [selector_opd $op2] }]
	} elseif [string match "\|\|" $opr] {
	set answer [expr { [selector_opd $op1] \|\| [selector_opd $op2] }]
	} else {
	# Assume it's a list of target triplets.
	set answer [selector_list $exp]
	}
	} else {
	# Assume it's a list of target triplets.
	set answer [selector_list $exp]
	}

	verbose "selector_expression: `$exp' $answer" 2
	return $answer
	}

	# Evaluate "target selector" or "xfail selector".

	proc dg-process-target-1 { args } {
	verbose "dg-process-target-1: `$args'" 2

	# Extract the 'what' keyword from the argument list.
	set selector [string trim [lindex $args 0]]
	if [regexp "^xfail " $selector] {
	set what "xfail"
	} elseif [regexp "^target " $selector] {
	set what "target"
	} else {
	error "syntax error in target selector \"$selector\""
	}

	# Extract the rest of the list, which might be a keyword.
	regsub "^${what}" $selector "" rest
	set rest [string trim $rest]

	if [is-effective-target-keyword $rest] {
	# The selector is an effective target keyword.
	if [is-effective-target $rest] {
	return [expr { $what == "xfail" ? "F" : "S" }]
	} else {
	return [expr { $what == "xfail" ? "P" : "N" }]
	}
	}

	if [string match "{*}" $rest] {
	if [selector_expression [lindex $rest 0]] {
	return [expr { $what == "xfail" ? "F" : "S" }]
	} else {
	return [expr { $what == "xfail" ? "P" : "N" }]
	}
	}

	# The selector is not an effective-target keyword, so process
	# the list of target triplets.
	return [saved-dg-process-target $selector]
	}

	# Intercept calls to the DejaGnu function. In addition to
	# processing "target selector" or "xfail selector", handle
	# "target selector1 xfail selector2".

	proc dg-process-target { args } {
	verbose "replacement dg-process-target: `$args'" 2

	set selector [string trim [lindex $args 0]]

	# If the argument list contains both 'target' and 'xfail',
	# process 'target' and, if that succeeds, process 'xfail'.
	if [regexp "^target .* xfail .*" $selector] {
	set xfail_index [string first "xfail" $selector]
	set xfail_selector [string range $selector $xfail_index end]
	set target_selector [string range $selector 0 [expr $xfail_index-1]]
	set target_selector [string trim $target_selector]
	if { [dg-process-target-1 $target_selector] == "N" } {
	return "N"
	}
	return [dg-process-target-1 $xfail_selector]

	}
	return [dg-process-target-1 $selector]
	}
	}

	# If this target does not support the "symver" attribute, skip this
	# test.

	proc dg-require-symver { args } {
	if { ![ check_symver_available ] } {
	upvar dg-do-what dg-do-what
	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
	}
	}