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| author | Chris Lattner <sabre@nondot.org> | 2003-08-13 05:38:46 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2003-08-13 05:38:46 +0000 |
| commit | d07283a2adeb4f86dd3f63e8ce01adedd096991c (patch) | |
| tree | b95484b9900197c748333a2dc80a39654714860f /llvm/lib/Transforms/Scalar/InstructionCombining.cpp | |
| parent | c992add9fe7cfde2cdb5cc1bd8addfa8adc123e2 (diff) | |
| download | bcm5719-llvm-d07283a2adeb4f86dd3f63e8ce01adedd096991c.tar.gz bcm5719-llvm-d07283a2adeb4f86dd3f63e8ce01adedd096991c.zip | |
Implement InstCombine/2003-08-12-AllocaNonNull.ll
llvm-svn: 7807
Diffstat (limited to 'llvm/lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index d2d8c93b5f7..8a3c0d47e97 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -768,10 +768,12 @@ Instruction *InstCombiner::visitSetCondInst(BinaryOperator &I) { if (Op0 == Op1) return ReplaceInstUsesWith(I, ConstantBool::get(isTrueWhenEqual(I))); - // setcc <global*>, 0 - Global value addresses are never null! - if (isa<GlobalValue>(Op0) && isa<ConstantPointerNull>(Op1)) + // setcc <global/alloca*>, 0 - Global/Stack value addresses are never null! + if (isa<ConstantPointerNull>(Op1) && + (isa<GlobalValue>(Op0) || isa<AllocaInst>(Op0))) return ReplaceInstUsesWith(I, ConstantBool::get(!isTrueWhenEqual(I))); + // setcc's with boolean values can always be turned into bitwise operations if (Ty == Type::BoolTy) { // If this is <, >, or !=, we can change this into a simple xor instruction |
