Set the calling convention based on the CGFunctionInfo.

llvm-svn: 81582
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 399624d..fcaa49e 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -851,9 +851,9 @@
   }
 
   CS.setAttributes(Attrs);
-  if (const llvm::Function *F =
-        dyn_cast<llvm::Function>(Callee->stripPointerCasts()))
-    CS.setCallingConv(F->getCallingConv());
+  llvm::CallingConv::ID CC =
+    static_cast<llvm::CallingConv::ID>(CallInfo.getCallingConvention());
+  CS.setCallingConv(CC);
 
   // If the call doesn't return, finish the basic block and clear the
   // insertion point; this allows the rest of IRgen to discard
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index ba9828c..33a8403 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1386,6 +1386,13 @@
   CallArgList Args;
   EmitCallArgs(Args, FnType->getAsFunctionProtoType(), ArgBeg, ArgEnd);
 
-  return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args),
+  // FIXME: We should not need to do this, it should be part of the function
+  // type.
+  unsigned CallingConvention = 0;
+  if (const llvm::Function *F =
+      dyn_cast<llvm::Function>(Callee->stripPointerCasts()))
+    CallingConvention = F->getCallingConv();
+  return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args,
+                                                 CallingConvention),
                   Callee, Args, TargetDecl);
 }
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 064f3ef..0018211 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -343,12 +343,9 @@
   F->setAttributes(llvm::AttrListPtr::get(AttributeList.begin(),
                                         AttributeList.size()));
 
-  // Set the appropriate calling convention for the Function.
-  if (D->hasAttr<FastCallAttr>())
-    F->setCallingConv(llvm::CallingConv::X86_FastCall);
-
-  if (D->hasAttr<StdCallAttr>())
-    F->setCallingConv(llvm::CallingConv::X86_StdCall);
+  llvm::CallingConv::ID CC =
+    static_cast<llvm::CallingConv::ID>(Info.getCallingConvention());
+  F->setCallingConv(CC);
 }
 
 void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,