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| author | Chris Lattner <sabre@nondot.org> | 2005-03-04 23:21:33 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-03-04 23:21:33 +0000 |
| commit | cfe2822cdf70822d696a474ea0d53d31df45fc30 (patch) | |
| tree | 227fccca96a5a69a2867dcfa58579bfe5c5d14b2 /llvm/lib/Transforms | |
| parent | 6cc4ee0f24c81c06f31aaa90813809712611db0f (diff) | |
| download | bcm5719-llvm-cfe2822cdf70822d696a474ea0d53d31df45fc30.tar.gz bcm5719-llvm-cfe2822cdf70822d696a474ea0d53d31df45fc30.zip | |
Do not compute 1ULL << 64, which is undefined. This fixes Ptrdist/ks on the
sparc, and testcase Regression/Transforms/InstCombine/2005-03-04-ShiftOverflow.ll
llvm-svn: 20445
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index a90dde6c8aa..e944672d262 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -2563,7 +2563,8 @@ Instruction *InstCombiner::visitSetCondInst(BinaryOperator &I) { Constant *Mask; if (CI->getType()->isUnsigned()) { unsigned TypeBits = CI->getType()->getPrimitiveSize()*8; - Val &= (1ULL << TypeBits)-1; + if (TypeBits != 64) + Val &= (1ULL << TypeBits)-1; Mask = ConstantUInt::get(CI->getType(), Val); } else { Mask = ConstantSInt::get(CI->getType(), Val); |
