From fdf389b9e41c6b1ff2b24fd56e5c253a8703092b Mon Sep 17 00:00:00 2001
From: Anton Korobeynikov <asl@math.spbu.ru>
Date: Tue, 11 Nov 2008 20:21:14 +0000
Subject: [PATCH] Codegen support for fastcall & stdcall CC. Patch by Ilya
 Okonsky!

llvm-svn: 59080
---
 clang/lib/CodeGen/CodeGenModule.cpp   |  5 ++++-
 clang/test/CodeGen/stdcall-fastcall.c | 17 +++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 clang/test/CodeGen/stdcall-fastcall.c

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 3555ccd53a59..c4877a674533 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -252,7 +252,10 @@ void CodeGenModule::SetFunctionAttributes(const Decl *D,
 
   // Set the appropriate calling convention for the Function.
   if (D->getAttr<FastCallAttr>())
-    F->setCallingConv(llvm::CallingConv::Fast);
+    F->setCallingConv(llvm::CallingConv::X86_FastCall);
+
+  if (D->getAttr<StdCallAttr>())
+    F->setCallingConv(llvm::CallingConv::X86_StdCall);
 }
 
 /// SetFunctionAttributesForDefinition - Set function attributes
diff --git a/clang/test/CodeGen/stdcall-fastcall.c b/clang/test/CodeGen/stdcall-fastcall.c
new file mode 100644
index 000000000000..a599405d2798
--- /dev/null
+++ b/clang/test/CodeGen/stdcall-fastcall.c
@@ -0,0 +1,17 @@
+// RUN: clang -emit-llvm < %s | grep 'fastcallcc' | count 4
+// RUN: clang -emit-llvm < %s | grep 'stdcallcc' | count 4
+
+void __attribute__((fastcall)) f1(void);
+void __attribute__((stdcall)) f2(void);
+void __attribute__((fastcall)) f3(void) {
+  f1();
+}
+void __attribute__((stdcall)) f4(void) {
+  f2();
+}
+
+int main(void) {
+    f3(); f4();
+    return 0;
+}
+
-- 
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