Have InstCombine call SipmlifyCall when handling calls. Test case included.

llvm-svn: 174675

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 64cd1bd2789..cb9ba44600a 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -13,6 +13,7 @@
 
 #include "InstCombine.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/InstructionSimplify.h"
 #include "llvm/Analysis/MemoryBuiltins.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/Support/CallSite.h"
@@ -210,6 +211,11 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
     return &CI;
   }
 
+  CallSite CS(&CI);
+  if (Value *V = SimplifyCall(CS.getCalledValue(), CS.arg_begin(), CS.arg_end(),
+                              TD))
+    return ReplaceInstUsesWith(CI, V);
+
   IntrinsicInst *II = dyn_cast<IntrinsicInst>(&CI);
   if (!II) return visitCallSite(&CI);