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| author | Chris Lattner <sabre@nondot.org> | 2010-01-11 22:49:40 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-01-11 22:49:40 +0000 |
| commit | 53af2d13e763c2d6e8ea1baf29644d954edb999d (patch) | |
| tree | 00c5476104d2b75444a94a790215cbc506cde7b3 /lib/Transforms | |
| parent | a958cbfe367ed7bf6a3a260b28a7b19cf70b7d9f (diff) | |
| download | external_llvm-53af2d13e763c2d6e8ea1baf29644d954edb999d.zip external_llvm-53af2d13e763c2d6e8ea1baf29644d954edb999d.tar.gz external_llvm-53af2d13e763c2d6e8ea1baf29644d954edb999d.tar.bz2 | |
reenable the piece that turns trunc(zext(x)) -> x even if zext has multiple uses,
codegen has no apparent problem with the trunc version of this, because it turns
into a simple subreg idiom
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93202 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCasts.cpp | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp index b5da3e6..e018b35 100644 --- a/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -327,9 +327,7 @@ static bool CanEvaluateTruncated(Value *V, const Type *Ty) { // If this is an extension from the dest type, we can eliminate it, even if it // has multiple uses. - // FIXME: This is currently disabled until codegen can handle this without - // pessimizing code, PR5997. - if (0 && (isa<ZExtInst>(I) || isa<SExtInst>(I)) && + if ((isa<ZExtInst>(I) || isa<SExtInst>(I)) && I->getOperand(0)->getType() == Ty) return true; |