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[X86][MCU] Minor bug fix for r293469 + test case 

llvm-svn: 293478
This commit is contained in:
Asaf Badouh 2017-01-30 13:14:37 +00:00
parent e81adb52b1
commit e11d2d73bf
2 changed files with 15 additions and 1 deletions
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2
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -17395,7 +17395,7 @@ SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
DAG.getNode(ISD::ANY_EXTEND, DL, VT, CmpOp0.getOperand(0)),
DAG.getConstant(1, DL, VT));
else
Neg = Cmp;
Neg = CmpOp0;
SDValue Mask = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT),
Neg); // -(and (x, 0x1))
SDValue And = DAG.getNode(ISD::AND, DL, VT, Mask, Src1); // Mask & z

14
llvm/test/CodeGen/X86/select.ll
View File

@ -678,3 +678,17 @@ entry:
%1 = select i1 %cmp10, i32 %A, i32 %0
ret i32 %1
}
define i32 @select_or_1(i32 %A, i32 %B, i32 %cond) {
; CHECK-LABEL: select_or_1:
; MCU: andl $1, %ecx
; MCU-NEXT: negl %ecx
; MCU-NEXT: andl %edx, %ecx
; MCU-NEXT: orl %ecx, %eax
entry:
%and = and i32 %cond, 1
%cmp10 = icmp eq i32 %and, 0
%0 = or i32 %B, %A
%1 = select i1 %cmp10, i32 %A, i32 %0
ret i32 %1
}