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combine.c (distribute_notes): Don't delete sets to global register variables.

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2004-06-24  Eric Christopher  <echristo@redhat.com>

	* combine.c (distribute_notes): Don't delete sets to
	global register variables.

From-SVN: r83606
This commit is contained in:
Eric Christopher 2004-06-24 19:15:43 +00:00 • committed by Eric Christopher
parent d413e3cc11
commit de7c79cc77
2 changed files with 9 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-06-24 Eric Christopher <echristo@redhat.com>
* combine.c (distribute_notes): Don't delete sets to
global register variables.
2004-06-24 Jakub Jelinek <jakub@redhat.com>
* config/i386/i386.md (ffsdi2, clzdi2): New expanders.

6
gcc/combine.c
View file

@ -11821,8 +11821,10 @@ distribute_notes (rtx notes, rtx from_insn, rtx i3, rtx i2)
/* If the register is being set at TEM, see if that is all
TEM is doing. If so, delete TEM. Otherwise, make this
into a REG_UNUSED note instead. */
if (reg_set_p (XEXP (note, 0), PATTERN (tem)))
into a REG_UNUSED note instead. Don't delete sets to
global register vars. */
if (reg_set_p (XEXP (note, 0), PATTERN (tem))
&& !global_regs [REGNO(XEXP (note, 0))])
{
rtx set = single_set (tem);
rtx inner_dest = 0;