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re PR debug/43593 (Var-tracking unnecessarily flushes all call used registers on calls instead of regs invalidated by call)

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PR debug/43593
	* var-tracking.c (dataflow_set_clear_at_call): Invalidate
	just regs_invalidated_by_call instead all call_used_reg_set
	registers.

	* gcc.dg/guality/pr43593.c: New test.

From-SVN: r157834
This commit is contained in:
Jakub Jelinek 2010-03-30 22:16:52 +02:00 • committed by Jakub Jelinek
parent 8533c9d8ac
commit 03a5f060b9
4 changed files with 37 additions and 1 deletions
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7
gcc/ChangeLog
View file

@ -1,3 +1,10 @@
2010-03-30 Jakub Jelinek <jakub@redhat.com>
PR debug/43593
* var-tracking.c (dataflow_set_clear_at_call): Invalidate
just regs_invalidated_by_call instead all call_used_reg_set
registers.
2010-03-30 Sebastian Pop <sebastian.pop@amd.com>
PR middle-end/43430

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2010-03-30 Jakub Jelinek <jakub@redhat.com>
PR debug/43593
* gcc.dg/guality/pr43593.c: New test.
2010-03-30 Sebastian Pop <sebastian.pop@amd.com>
PR middle-end/43430

24
gcc/testsuite/gcc.dg/guality/pr43593.c Normal file
View file

@ -0,0 +1,24 @@
/* PR debug/43593 */
/* { dg-do run } */
/* { dg-options "-g" } */
void __attribute__((noinline))
bar (int *p)
{
asm volatile ("" : : "r" (p) : "memory");
}
int __attribute__((noinline))
foo (void)
{
int i, *j = &i;
bar (j);
return 6 + i; /* { dg-final { gdb-test 16 "j" "&i" } } */
}
int
main (void)
{
foo ();
return 0;
}

2
gcc/var-tracking.c
View file

@ -4170,7 +4170,7 @@ dataflow_set_clear_at_call (dataflow_set *set)
int r;
for (r = 0; r < FIRST_PSEUDO_REGISTER; r++)
if (TEST_HARD_REG_BIT (call_used_reg_set, r))
if (TEST_HARD_REG_BIT (regs_invalidated_by_call, r))
var_regno_delete (set, r);
if (MAY_HAVE_DEBUG_INSNS)