From ed89d069f4d6be2913ef5a1ae8fd2f9b28ddaab2 Mon Sep 17 00:00:00 2001
From: Michael Berg <michael_c_berg@apple.com>
Date: Thu, 16 Aug 2018 20:59:45 +0000
Subject: add a missed case for binary op FMF propagation under select folds

llvm-svn: 339938
---
 llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp')

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
index dc8e8df421e..f1f2a6606e2 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
@@ -354,7 +354,9 @@ Instruction *InstCombiner::foldSelectOpOp(SelectInst &SI, Instruction *TI,
   Value *Op0 = MatchIsOpZero ? MatchOp : NewSI;
   Value *Op1 = MatchIsOpZero ? NewSI : MatchOp;
   if (auto *BO = dyn_cast<BinaryOperator>(TI)) {
-    return BinaryOperator::Create(BO->getOpcode(), Op0, Op1);
+    BinaryOperator *NewBO = BinaryOperator::Create(BO->getOpcode(), Op0, Op1);
+    NewBO->copyIRFlags(BO);
+    return NewBO;
   }
   if (auto *TGEP = dyn_cast<GetElementPtrInst>(TI)) {
     auto *FGEP = cast<GetElementPtrInst>(FI);
-- 
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