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Don't assign the shift the same type as the variable being shifted. This could

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result in illegal types for the SHL operator.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92797 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-01-05 22:39:10 +00:00
parent 8314299161
commit 9f7c5c0dca
2 changed files with 18 additions and 1 deletions
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4
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -3322,7 +3322,9 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
DebugLoc dl = N->getDebugLoc();
return DAG.getNode(N0.getOpcode(), dl, VT,
DAG.getNode(ISD::ZERO_EXTEND, dl, VT, N0.getOperand(0)),
DAG.getNode(ISD::ZERO_EXTEND, dl, VT, N0.getOperand(1)));
DAG.getNode(ISD::ZERO_EXTEND, dl,
N0.getOperand(1).getValueType(),
N0.getOperand(1)));
}
return SDValue();

15
test/CodeGen/X86/2010-01-05-ZExt-Shl.ll Normal file
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@ -0,0 +1,15 @@
; RUN: llc < %s -march=x86-64
; <rdar://problem/7499313>
target triple = "i686-apple-darwin8"
declare void @func2(i16 zeroext)
define void @func1() nounwind {
entry:
%t1 = icmp ne i8 undef, 0
%t2 = icmp eq i8 undef, 14
%t3 = and i1 %t1, %t2
%t4 = select i1 %t3, i16 0, i16 128
call void @func2(i16 zeroext %t4) nounwind
ret void
}