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function: Call do_pending_stack_adjust in assign_parms [PR117296]

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Functions called by assign_parms call emit_block_move in two places,
so on some targets can be expanded as calls and can result in pending
stack adjustment.

Now, during expansion we normally call do_pending_stack_adjust at the end
of expansion of each basic block or before emitting code that will branch
and/or has labels, and when emitting labels we assert that there are no
pending stack adjustments.

assign_parms is expanded before the first basic block and if the first
basic block starts with a label and at least one of those emit_block_move
calls resulted in the need of pending stack adjustments, we ICE when
emitting that label.

The following patch fixes that by calling do_pending_stack_adjust after
after the assign_parms potential emit_block_move calls.

2024-10-30  Jakub Jelinek  <jakub@redhat.com>

	PR target/117296
	* function.cc (assign_parms): Call do_pending_stack_adjust.

	* gcc.target/i386/pr117296.c: New test.
This commit is contained in:
Jakub Jelinek 2024-10-30 09:59:22 +01:00 committed by Jakub Jelinek
parent cd5535494c
commit fccef0c4ed
2 changed files with 14 additions and 0 deletions
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2
gcc/function.cc
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@ -3747,6 +3747,8 @@ assign_parms (tree fndecl)
now that all parameters have been copied out of hard registers. */
emit_insn (all.first_conversion_insn);
do_pending_stack_adjust ();
/* Estimate reload stack alignment from scalar return mode. */
if (SUPPORTS_STACK_ALIGNMENT)
{

12
gcc/testsuite/gcc.target/i386/pr117296.c Normal file
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@ -0,0 +1,12 @@
/* PR target/117296 */
/* { dg-do compile } */
/* { dg-options "-O1" } */
/* { dg-additional-options "-mtune=k6 -mstringop-strategy=libcall -ffloat-store" { target ia32 } } */
int x;
void
foo (_Complex double c)
{
lab:;
}