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gcse.c (do_local_cprop): Do not extend lifetimes of registers set by do_local_cprop. 

* gcse.c (do_local_cprop): Do not extend lifetimes of registers set by
	do_local_cprop.

From-SVN: r55626
This commit is contained in:
Jan Hubicka 2002-07-21 21:38:08 +02:00 committed by Jan Hubicka
parent 60ffc1b816
commit 4669036917
2 changed files with 15 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Sun Jul 21 21:36:41 CEST 2002 Jan Hubicka <jh@suse.cz>
* gcse.c (do_local_cprop): Do not extend lifetimes of registers set by
do_local_cprop.
2002-07-21 Andreas Jaeger <aj@suse.de>
* reload1.c (fixup_abnormal_edges): Remove unused variable.

11
gcc/gcse.c
View File

@ -4312,9 +4312,18 @@ do_local_cprop (x, insn, alter_jumps)
for (l = val->locs; l; l = l->next)
{
rtx this_rtx = l->loc;
rtx note;
if (CONSTANT_P (this_rtx))
newcnst = this_rtx;
if (REG_P (this_rtx) && REGNO (this_rtx) >= FIRST_PSEUDO_REGISTER)
if (REG_P (this_rtx) && REGNO (this_rtx) >= FIRST_PSEUDO_REGISTER
/* Don't copy propagate if it has attached REG_EQUIV note.
At this point this only function parameters should have
REG_EQUIV notes and if the argument slot is used somewhere
explicitly, it means address of parameter has been taken,
so we should not extend the lifetime of the pseudo. */
&& (!(note = find_reg_note (l->setting_insn, REG_EQUIV, NULL_RTX))
|| GET_CODE (XEXP (note, 0)) != MEM))
newreg = this_rtx;
}
if (newcnst && constprop_register (insn, x, newcnst, alter_jumps))