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| author | matz <matz@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-09-26 16:46:43 +0000 |
|---|---|---|
| committer | matz <matz@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-09-26 16:46:43 +0000 |
| commit | f96f389461e2fd1d81524bfa3444abfaeda70500 (patch) | |
| tree | fc0937d4c203e0e21e06fbed2a7077820564c6b4 /gcc/tree-ssa-coalesce.c | |
| parent | 67649397abe730ccf2f03176864e06c2bf836019 (diff) | |
| download | gcc-f96f389461e2fd1d81524bfa3444abfaeda70500.tar.gz | |
PR lto/40758
PR middle-end/41470
* tree-ssa-coalesce.c (coalesce_ssa_name): Add only SSA names
that are mentioned in the body.
testsuite/
* gcc.dg/pr41470.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@152203 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-coalesce.c')
| -rw-r--r-- | gcc/tree-ssa-coalesce.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/tree-ssa-coalesce.c b/gcc/tree-ssa-coalesce.c index 0164eca7ddb..5841aa07522 100644 --- a/gcc/tree-ssa-coalesce.c +++ b/gcc/tree-ssa-coalesce.c @@ -1377,7 +1377,10 @@ coalesce_ssa_name (void) { tree a = ssa_name (i); - if (a && SSA_NAME_VAR (a) && !DECL_ARTIFICIAL (SSA_NAME_VAR (a))) + if (a + && SSA_NAME_VAR (a) + && !DECL_ARTIFICIAL (SSA_NAME_VAR (a)) + && (!has_zero_uses (a) || !SSA_NAME_IS_DEFAULT_DEF (a))) { tree *slot = (tree *) htab_find_slot (ssa_name_hash, a, INSERT); |