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| author | kazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-05-17 21:34:57 +0000 |
|---|---|---|
| committer | kazu <kazu@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-05-17 21:34:57 +0000 |
| commit | f3cc7f799c62e6b43c1a0c254fb49f8a0cbb0d79 (patch) | |
| tree | 15c52851e5d2a59555251f2ed6c4bbb75ec3404a | |
| parent | 4a7ea892fcd76a0036b3f1c320ede4b6cde5a638 (diff) | |
| download | ppe42-gcc-f3cc7f799c62e6b43c1a0c254fb49f8a0cbb0d79.tar.gz ppe42-gcc-f3cc7f799c62e6b43c1a0c254fb49f8a0cbb0d79.zip | |
PR rtl-optimization/27477
* combine.c (try_combine): Don't split a parallel consisting
of two sets into two individual sets if both sets reference
cc0.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@113872 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/combine.c | 9 |
2 files changed, 15 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d71b1b4c276..ff616dc32ff 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2006-05-17 Kazu Hirata <kazu@codesourcery.com> + + PR rtl-optimization/27477 + * combine.c (try_combine): Don't split a parallel consisting + of two sets into two individual sets if both sets reference + cc0. + 2006-05-17 John David Anglin <dave.anglin@nrc-cnrc.gc.ca> * unwind-dw2.c: Add declarations for uw_update_context and diff --git a/gcc/combine.c b/gcc/combine.c index 33512ec4635..c570ea628ee 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2896,7 +2896,14 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p) && ! reg_referenced_p (SET_DEST (XVECEXP (newpat, 0, 0)), XVECEXP (newpat, 0, 1)) && ! (contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 0))) - && contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 1))))) + && contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 1)))) +#ifdef HAVE_cc0 + /* We cannot split the parallel into two sets if both sets + reference cc0. */ + && ! (reg_referenced_p (cc0_rtx, XVECEXP (newpat, 0, 0)) + && reg_referenced_p (cc0_rtx, XVECEXP (newpat, 0, 1))) +#endif + ) { /* Normally, it doesn't matter which of the two is done first, but it does if one references cc0. In that case, it has to |
