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Add check so we don't try to perform an impossible transformation. Fixes issue from PR11319.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144216 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2011-11-09 22:25:12 +00:00
parent 7346347674
commit 0948f0acca
2 changed files with 17 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -1783,7 +1783,8 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op,
case ISD::BITCAST:
// If this is an FP->Int bitcast and if the sign bit is the only
// thing demanded, turn this into a FGETSIGN.
if (!Op.getOperand(0).getValueType().isVector() &&
if (!Op.getValueType().isVector() &&
!Op.getOperand(0).getValueType().isVector() &&
NewMask == APInt::getSignBit(Op.getValueType().getSizeInBits()) &&
Op.getOperand(0).getValueType().isFloatingPoint()) {
bool OpVTLegal = isOperationLegalOrCustom(ISD::FGETSIGN, Op.getValueType());

15
test/CodeGen/ARM/2011-11-09-BitcastVectorDouble.ll Normal file
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@ -0,0 +1,15 @@
; RUN: llc < %s -march=arm -mattr=+neon | FileCheck %s
; PR11319
@src1_v2i16 = global <2 x i16> <i16 0, i16 1>
@res_v2i16 = global <2 x i16> <i16 0, i16 0>
declare <2 x i16> @foo_v2i16(<2 x i16>) nounwind
define void @test_neon_call_return_v2i16() {
; CHECK: test_neon_call_return_v2i16:
%1 = load <2 x i16>* @src1_v2i16
%2 = call <2 x i16> @foo_v2i16(<2 x i16> %1) nounwind
store <2 x i16> %2, <2 x i16>* @res_v2i16
ret void
}