From 93a635c82c33e331bd4c5f4f44ba1e37a08bd687 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Wed, 13 Jul 2011 19:08:16 +0000
Subject: It's not safe to fold (fptrunc (sqrt (fpext x))) to (sqrtf x) if
 there is another use of sqrt. rdar://9763193

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135058 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/InstCombine/InstCombineCasts.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/Transforms/InstCombine/InstCombineCasts.cpp')

diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp
index 036f0d3367..82c734e0b8 100644
--- a/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -1216,7 +1216,8 @@ Instruction *InstCombiner::visitFPTrunc(FPTruncInst &CI) {
   CallInst *Call = dyn_cast<CallInst>(CI.getOperand(0));
   if (Call && Call->getCalledFunction() &&
       Call->getCalledFunction()->getName() == "sqrt" &&
-      Call->getNumArgOperands() == 1) {
+      Call->getNumArgOperands() == 1 &&
+      Call->hasOneUse()) {
     CastInst *Arg = dyn_cast<CastInst>(Call->getArgOperand(0));
     if (Arg && Arg->getOpcode() == Instruction::FPExt &&
         CI.getType()->isFloatTy() &&
-- 
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