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| author | Eli Friedman <eli.friedman@gmail.com> | 2012-02-18 03:29:25 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2012-02-18 03:29:25 +0000 |
| commit | 952d1f9f40733718774aaf3694dee41dae30e55a (patch) | |
| tree | b857f518932585e23c9187d1d7eb94d70a8b8c7d /llvm/lib/Analysis/InstructionSimplify.cpp | |
| parent | d951a1d9c8fc0d4c6409dae93275515d076049ee (diff) | |
| download | bcm5719-llvm-952d1f9f40733718774aaf3694dee41dae30e55a.tar.gz bcm5719-llvm-952d1f9f40733718774aaf3694dee41dae30e55a.zip | |
Fix a rather nasty regression from r150690: LHS != RHS does not imply LHS->stripPointerCasts() != RHS->stripPointerCasts().
llvm-svn: 150863
Diffstat (limited to 'llvm/lib/Analysis/InstructionSimplify.cpp')
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index 9d5b74c8cf2..88a2c53e806 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -1593,10 +1593,11 @@ static Value *SimplifyICmpInst(unsigned Predicate, Value *LHS, Value *RHS, // the compare, and if only one of them is then we moved it to RHS already. Value *LHSPtr = LHS->stripPointerCasts(); Value *RHSPtr = RHS->stripPointerCasts(); + if (LHSPtr == RHSPtr) + return ConstantInt::get(ITy, CmpInst::isTrueWhenEqual(Pred)); if (isa<AllocaInst>(LHSPtr) && (isa<GlobalValue>(RHSPtr) || isa<AllocaInst>(RHSPtr) || isa<ConstantPointerNull>(RHSPtr))) - // We already know that LHS != RHS. return ConstantInt::get(ITy, CmpInst::isFalseWhenEqual(Pred)); // If we are comparing with zero then try hard since this is a common case. |
