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ConstantFolding: ComputeMaskedBits wants the scalar size for vectors.

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Fixes PR15791.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179859 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2013-04-19 16:56:24 +00:00
parent 89ab4e4cd0
commit eb733d2a1b
2 changed files with 10 additions and 1 deletions
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2
lib/Analysis/ConstantFolding.cpp
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@ -551,7 +551,7 @@ static Constant *SymbolicallyEvaluateBinop(unsigned Opc, Constant *Op0,
if (Opc == Instruction::And && DL) {
unsigned BitWidth = DL->getTypeSizeInBits(Op0->getType());
unsigned BitWidth = DL->getTypeSizeInBits(Op0->getType()->getScalarType());
APInt KnownZero0(BitWidth, 0), KnownOne0(BitWidth, 0);
APInt KnownZero1(BitWidth, 0), KnownOne1(BitWidth, 0);
ComputeMaskedBits(Op0, KnownZero0, KnownOne0, DL);

9
test/Transforms/InstSimplify/2013-04-19-ConstantFoldingCrash.ll Normal file
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@ -0,0 +1,9 @@
; RUN: opt < %s -instsimplify
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
; PR15791
define <2 x i64> @test1() {
%a = and <2 x i64> undef, bitcast (<4 x i32> <i32 undef, i32 undef, i32 undef, i32 2147483647> to <2 x i64>)
ret <2 x i64> %a
}