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| author | Richard Earnshaw <rearnsha@arm.com> | 2001-09-21 14:39:28 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2001-09-21 14:39:28 +0000 |
| commit | 7106d491044fec66141ed9defe95d80650f374e0 (patch) | |
| tree | 1361fc790de66f92cceffd8d029e83579c26a96d /gcc | |
| parent | 53c170316f895dc3dfa7173e69fc43b15b7acb1a (diff) | |
| download | gcc-7106d491044fec66141ed9defe95d80650f374e0.zip gcc-7106d491044fec66141ed9defe95d80650f374e0.tar.gz gcc-7106d491044fec66141ed9defe95d80650f374e0.tar.bz2 | |
cfgcleanup.c (flow_find_cross_jump): Delete any REG_EQUAL notes that would be invalid after a merge.
* cfgcleanup.c (flow_find_cross_jump): Delete any REG_EQUAL notes
that would be invalid after a merge.
From-SVN: r45727
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cfgcleanup.c | 16 |
2 files changed, 21 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4dfc2e0..49148b0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c index 314d9f4..a3ddcac 100644 --- a/gcc/cfgcleanup.c +++ b/gcc/cfgcleanup.c @@ -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++; |