Do not optimize (or (and X,Y), Z) into BFI and other sequences if the AND ISDNode has more than one user.
rdar://11876519
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 52bdd52..c66618a 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -7422,8 +7422,12 @@
return COR;
}
+
+ // The code below optimizes (or (and X, Y), Z).
+ // The AND operand needs to have a single user to make these optimizations
+ // profitable.
SDValue N0 = N->getOperand(0);
- if (N0.getOpcode() != ISD::AND)
+ if (N0.getOpcode() != ISD::AND || !N0.hasOneUse())
return SDValue();
SDValue N1 = N->getOperand(1);