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cfgcleanup.c (flow_find_cross_jump): Delete any REG_EQUAL notes that would be invalid after a merge.

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* cfgcleanup.c (flow_find_cross_jump): Delete any REG_EQUAL notes
that would be invalid after a merge.

From-SVN: r45727
This commit is contained in:
Richard Earnshaw 2001-09-21 14:39:28 +00:00 committed by Richard Earnshaw
parent 53c170316f
commit 7106d49104
2 changed files with 21 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
21-09-2001 Richard Earnshaw (reanrsha@arm.com)
* cfgcleanup.c (flow_find_cross_jump): Delete any REG_EQUAL notes
that would be invalid after a merge.
Fri Sep 21 14:24:29 CEST 2001 Jan Hubicka <jh@suse.cz>
* basic-block.h (flow_delete_insn, flow_delete_insn_chain): Kill.

16
gcc/cfgcleanup.c
View File

@ -583,6 +583,22 @@ flow_find_cross_jump (mode, bb1, bb2, f1, f2)
/* Don't begin a cross-jump with a USE or CLOBBER insn. */
if (GET_CODE (p1) != USE && GET_CODE (p1) != CLOBBER)
{
/* If the merged insns have different REG_EQUAL notes, then
remove them. */
rtx equiv1 = find_reg_equal_equiv_note (i1);
rtx equiv2 = find_reg_equal_equiv_note (i2);
if (equiv1 && !equiv2)
remove_note (i1, equiv1);
else if (!equiv1 && equiv2)
remove_note (i2, equiv2);
else if (equiv1 && equiv2
&& !rtx_equal_p (XEXP (equiv1, 0), XEXP (equiv2, 0)))
{
remove_note (i1, equiv1);
remove_note (i2, equiv2);
}
afterlast1 = last1, afterlast2 = last2;
last1 = i1, last2 = i2;
ninsns++;