commit 93a635c82c33e331bd4c5f4f44ba1e37a08bd687
author Evan Cheng <evan.cheng@apple.com> Wed Jul 13 19:08:16 2011 +0000
committer Evan Cheng <evan.cheng@apple.com> Wed Jul 13 19:08:16 2011 +0000
tree 9da1ef6184cdaf04d2978ea718dd639628ae59eb
parent 59642c260064a0c9140e048d702a21830020487f

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

diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp
index 036f0d3..82c734e 100644
--- a/lib/Transforms/InstCombine/InstCombineCasts.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp
@@ -1216,7 +1216,8 @@
   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() &&