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InstCombine: Disable umul.with.overflow recognition for vectors.

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It doesn't make a lot on most targets and the code isn't ready for it. PR20113.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211583 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2014-06-24 10:47:52 +00:00
parent 9c88403625
commit 0e6156a1a2
2 changed files with 16 additions and 1 deletions
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lib/Transforms/InstCombine/InstCombineCompares.cpp
+5 -1
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@@ -2042,9 +2042,13 @@ static Instruction *ProcessUAddIdiom(Instruction &I, Value *OrigAddV,
/// replacement required.
static Instruction *ProcessUMulZExtIdiom(ICmpInst &I, Value *MulVal,
Value *OtherVal, InstCombiner &IC) {
// Don't bother doing this transformation for pointers, don't do it for
// vectors.
if (!isa<IntegerType>(MulVal->getType()))
return nullptr;
assert(I.getOperand(0) == MulVal || I.getOperand(1) == MulVal);
assert(I.getOperand(0) == OtherVal || I.getOperand(1) == OtherVal);
assert(isa<IntegerType>(MulVal->getType()));
Instruction *MulInstr = cast<Instruction>(MulVal);
assert(MulInstr->getOpcode() == Instruction::Mul);