Fix a crash in SimpliftDemandedBits of vectors of pointers.

PR14183.

llvm-svn: 166785

1 files changed, 4 insertions, 6 deletions

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 1d7f0692cbe..2c3ac0e0756 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -430,15 +430,13 @@ void llvm::ComputeMaskedBits(Value *V, APInt &KnownZero, APInt &KnownOne,
   case Instruction::ZExt:
   case Instruction::Trunc: {
     Type *SrcTy = I->getOperand(0)->getType();
-    
+
     unsigned SrcBitWidth;
     // Note that we handle pointer operands here because of inttoptr/ptrtoint
     // which fall through here.
-    if (SrcTy->isPointerTy())
-      SrcBitWidth = TD->getTypeSizeInBits(SrcTy);
-    else
-      SrcBitWidth = SrcTy->getScalarSizeInBits();
-    
+    SrcBitWidth = TD->getTypeSizeInBits(SrcTy->getScalarType());
+
+    assert(SrcBitWidth && "SrcBitWidth can't be zero");
     KnownZero = KnownZero.zextOrTrunc(SrcBitWidth);
     KnownOne = KnownOne.zextOrTrunc(SrcBitWidth);
     ComputeMaskedBits(I->getOperand(0), KnownZero, KnownOne, TD, Depth+1);