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Revert r240291: causes problems in self-hosted builds. 

llvm-svn: 240343
This commit is contained in:
Pawel Bylica 2015-06-22 21:54:07 +00:00
parent 616fe5066a
commit e6fd8c4232
2 changed files with 1 additions and 10 deletions
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2
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4275,7 +4275,7 @@ SDValue DAGCombiner::visitSHL(SDNode *N) {
if (isNullConstant(N0))
return N0;
// fold (shl x, c >= size(x)) -> undef
if (N1C && N1C->getAPIntValue().uge(OpSizeInBits))
if (N1C && N1C->getZExtValue() >= OpSizeInBits)
return DAG.getUNDEF(VT);
// fold (shl x, 0) -> x
if (N1C && N1C->isNullValue())

9
llvm/test/CodeGen/X86/fold-vector-shl-crash.ll
View File

@ -1,9 +0,0 @@
; RUN: llc < %s -march=x86-64 | FileCheck %s
; RUN: llc < %s -march=x86 | FileCheck %s
;CHECK-LABEL: test
define <2 x i256> @test() {
%S = shufflevector <2 x i256> zeroinitializer, <2 x i256> <i256 -1, i256 -1>, <2 x i32> <i32 0, i32 2>
%B = shl <2 x i256> %S, <i256 -1, i256 -1> ; DAG Combiner crashes here
ret <2 x i256> %B
}