From 08bbd35a80bf7765fe0d3043f9eb5a2f2786b649 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 26 Jun 2017 20:32:52 +0000
Subject: Vendor import of llvm trunk r306325:
 https://llvm.org/svn/llvm-project/llvm/trunk@306325

---
 lib/Target/Mips/MipsISelLowering.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'lib/Target/Mips/MipsISelLowering.cpp')

diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index 68708dc4f50f..02102d6b22f4 100644
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -907,6 +907,11 @@ static SDValue performORCombine(SDNode *N, SelectionDAG &DAG,
         if (!(CN1 = dyn_cast<ConstantSDNode>(N->getOperand(1))))
           return SDValue();
       }
+      // Don't generate INS if constant OR operand doesn't fit into bits
+      // cleared by constant AND operand.
+      if (CN->getSExtValue() & CN1->getSExtValue())
+        return SDValue();
+
       SDLoc DL(N);
       EVT ValTy = N->getOperand(0)->getValueType(0);
       SDValue Const1;
-- 
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