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| author | aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-02-25 12:09:27 +0000 |
|---|---|---|
| committer | aoliva <aoliva@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-02-25 12:09:27 +0000 |
| commit | 0be329eff8728d984adb170591e01cd499de7a36 (patch) | |
| tree | 6ab41affb99d878e95476613024ed2c4536fa5c6 /gcc/var-tracking.c | |
| parent | a617841ca2bb5f4abc8d14884193dce35df87ceb (diff) | |
| download | gcc-0be329eff8728d984adb170591e01cd499de7a36.tar.gz | |
PR debug/52001
* cselib.c (preserve_only_constants): Rename to...
(preserve_constants_and_equivs): ... this. Split out...
(invariant_or_equiv_p): ... this. Preserve plus expressions
of other preserved expressions too.
(cselib_reset_table): Adjust.
* var-tracking.c (reverse_op): Use canonical value to build
reverse operation.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@184571 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/var-tracking.c')
| -rw-r--r-- | gcc/var-tracking.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/var-tracking.c b/gcc/var-tracking.c index e9b5ca886ae..c6280e2c1f1 100644 --- a/gcc/var-tracking.c +++ b/gcc/var-tracking.c @@ -5334,6 +5334,10 @@ reverse_op (rtx val, const_rtx expr, rtx insn) if (!v || !cselib_preserved_value_p (v)) return; + /* Use canonical V to avoid creating multiple redundant expressions + for different VALUES equivalent to V. */ + v = canonical_cselib_val (v); + /* Adding a reverse op isn't useful if V already has an always valid location. Ignore ENTRY_VALUE, while it is always constant, we should prefer non-ENTRY_VALUE locations whenever possible. */ |