Fixes PR19964.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210371
91177308-0d34-0410-b5e6-
96231b3b80d8
// If we have a constant logical shift that's only used in a comparison
// against zero turn it into an equivalent AND. This allows turning it into
// a TEST instruction later.
- if ((X86CC == X86::COND_E || X86CC == X86::COND_NE) &&
+ if ((X86CC == X86::COND_E || X86CC == X86::COND_NE) && Op->hasOneUse() &&
isa<ConstantSDNode>(Op->getOperand(1)) && !hasNonFlagsUse(Op)) {
EVT VT = Op.getValueType();
unsigned BitWidth = VT.getSizeInBits();
; CHECK: shrl $7, %edi
; CHECK-NEXT: cmovnsl %edx, %esi
}
+
+; PR19964
+define zeroext i1 @test15(i32 %bf.load, i32 %n) {
+ %bf.lshr = lshr i32 %bf.load, 16
+ %cmp2 = icmp eq i32 %bf.lshr, 0
+ %cmp5 = icmp uge i32 %bf.lshr, %n
+ %.cmp5 = or i1 %cmp2, %cmp5
+ ret i1 %.cmp5
+
+; CHECK-LABEL: test15:
+; CHECK: shrl $16, %edi
+; CHECK: cmpl %esi, %edi
+}