Constant fold view increment expressions
The idea here is to replace expressions like v + 1 + 1 + 1 with v + 3.
* dwarf2dbg.c (set_or_check_view): Remove useless assertion.
Resolve multiple view increments.
* testsuite/gas/elf/dwarf2-18.d: Don't xfail mep.
diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c
index 7269c4c..ba97b5f 100644
--- a/gas/dwarf2dbg.c
+++ b/gas/dwarf2dbg.c
@@ -402,18 +402,27 @@
if (viewx.X_op != O_constant || viewx.X_add_number)
{
expressionS incv;
+ expressionS *p_view;
if (!p->loc.u.view)
- {
- p->loc.u.view = symbol_temp_make ();
- gas_assert (!S_IS_DEFINED (p->loc.u.view));
- }
+ p->loc.u.view = symbol_temp_make ();
memset (&incv, 0, sizeof (incv));
incv.X_unsigned = 1;
incv.X_op = O_symbol;
incv.X_add_symbol = p->loc.u.view;
incv.X_add_number = 1;
+ p_view = symbol_get_value_expression (p->loc.u.view);
+ if (p_view->X_op == O_constant || p_view->X_op == O_symbol)
+ {
+ /* If we can, constant fold increments so that a chain of
+ expressions v + 1 + 1 ... + 1 is not created.
+ resolve_expression isn't ideal for this purpose. The
+ base v might not be resolvable until later. */
+ incv.X_op = p_view->X_op;
+ incv.X_add_symbol = p_view->X_add_symbol;
+ incv.X_add_number = p_view->X_add_number + 1;
+ }
if (viewx.X_op == O_constant)
{
diff --git a/gas/testsuite/gas/elf/dwarf2-18.d b/gas/testsuite/gas/elf/dwarf2-18.d
index db7a4f9..fbaebaa 100644
--- a/gas/testsuite/gas/elf/dwarf2-18.d
+++ b/gas/testsuite/gas/elf/dwarf2-18.d
@@ -2,9 +2,8 @@
#readelf: -x.rodata -wL
#name: DWARF2 18
# The am33 cr16 crx ft32 mn10 msp430 nds32 and rl78 targets do not evaluate the subtraction of symbols at assembly time.
-# The mep targets turns some view computations into complex relocations.
# The riscv targets do not support the subtraction of symbols.
-#xfail: am3*-* cr16-* crx-* ft32*-* mep-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
+#xfail: am3*-* cr16-* crx-* ft32*-* mn10*-* msp430-* nds32*-* riscv*-* rl78-*
Hex dump of section '\.rodata':
0x00000000 0100 *.*
