Add default calling convention support for regcall.

Added support for regcall as default calling convention. Also added code to
exclude main when applying default calling conventions.

Patch-By: eandrews

Differential Revision: https://reviews.llvm.org/D39210


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@317268 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 1 deletions

diff --git a/test/CodeGenCXX/default_calling_conv.cpp b/test/CodeGenCXX/default_calling_conv.cpp
index 15eedc8e31..b5b0f47ceb 100644
--- a/test/CodeGenCXX/default_calling_conv.cpp
+++ b/test/CodeGenCXX/default_calling_conv.cpp
@@ -3,18 +3,21 @@
 // RUN: %clang_cc1 -triple i486-unknown-linux-gnu -fdefault-calling-conv=stdcall -emit-llvm -o - %s | FileCheck %s --check-prefix=STDCALL --check-prefix=ALL
 // RUN: %clang_cc1 -triple i486-unknown-linux-gnu -mrtd -emit-llvm -o - %s | FileCheck %s --check-prefix=STDCALL --check-prefix=ALL
 // RUN: %clang_cc1 -triple i986-unknown-linux-gnu -fdefault-calling-conv=vectorcall -emit-llvm -o - %s | FileCheck %s --check-prefix=VECTORCALL --check-prefix=ALL
+// RUN: %clang_cc1 -triple i986-unknown-linux-gnu -fdefault-calling-conv=regcall -emit-llvm -o - %s | FileCheck %s --check-prefix=REGCALL --check-prefix=ALL
 
 // CDECL: define void @_Z5test1v
 // FASTCALL: define x86_fastcallcc void @_Z5test1v
 // STDCALL: define x86_stdcallcc void @_Z5test1v
 // VECTORCALL: define x86_vectorcallcc void @_Z5test1v
+// REGCALL: define x86_regcallcc void @_Z17__regcall3__test1v
 void test1() {}
 
-// fastcall, stdcall, and vectorcall all do not support variadic functions.
+// fastcall, stdcall, vectorcall and regcall do not support variadic functions.
 // CDECL: define void @_Z12testVariadicz
 // FASTCALL: define void @_Z12testVariadicz
 // STDCALL: define void @_Z12testVariadicz
 // VECTORCALL: define void @_Z12testVariadicz
+// REGCALL: define void @_Z12testVariadicz
 void testVariadic(...){}
 
 // ALL: define void @_Z5test2v
@@ -29,6 +32,9 @@ void __attribute__((stdcall)) test4() {}
 // ALL: define  x86_vectorcallcc void @_Z5test5v
 void __attribute__((vectorcall)) test5() {}
 
+// ALL: define x86_regcallcc void @_Z17__regcall3__test6v
+void __attribute__((regcall)) test6() {}
+
 // ALL: define linkonce_odr void @_ZN1A11test_memberEv
 class A {
 public:
@@ -39,3 +45,8 @@ void test() {
   A a;
   a.test_member();
 }
+
+// ALL: define i32 @main
+int main() {
+  return 1;
+}