[opaque pointer types] Pass function types to CallInst creation.

This cleans up all CallInst creation in LLVM to explicitly pass a
function type rather than deriving it from the pointer's element-type.

Differential Revision: https://reviews.llvm.org/D57170

llvm-svn: 352909
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index dc032ac..47c9af0 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -980,7 +980,7 @@
     }
   }
 
-  Constant *RegisterF = M->getFunction(getInstrProfRegFuncsName());
+  Function *RegisterF = M->getFunction(getInstrProfRegFuncsName());
   if (!RegisterF)
     return;
 
@@ -996,8 +996,7 @@
 
   // Add the basic block and the necessary calls.
   IRBuilder<> IRB(BasicBlock::Create(M->getContext(), "", F));
-  if (RegisterF)
-    IRB.CreateCall(RegisterF, {});
+  IRB.CreateCall(RegisterF, {});
   IRB.CreateRetVoid();
 
   appendToGlobalCtors(*M, F, 0);