From: Chris Lattner <sabre@nondot.org>
Date: Thu, 13 Nov 2003 19:17:02 +0000 (+0000)
Subject: Implement feature: InstCombine/2003-11-13-ConstExprCastCall.ll
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=917e8042535f67697f90310126c85804f7552fde;p=oota-llvm.git

Implement feature: InstCombine/2003-11-13-ConstExprCastCall.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9981 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 8522b610e13..db178b3d1fd 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -1801,7 +1801,8 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) {
   const Type *OldRetTy = Caller->getType();
 
   if (Callee->isExternal() &&
-      !OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType()))
+      !OldRetTy->isLosslesslyConvertibleTo(FT->getReturnType()) &&
+      !Caller->use_empty())
     return false;   // Cannot transform this return value...
 
   unsigned NumActualArgs = unsigned(CS.arg_end()-CS.arg_begin());