xref: /llvm-project/clang/test/CodeGenCXX/windows-x86-swiftcall.cpp (revision 1b9a6e58a8b831193c9e5e733f881aabe0d2d06b) 
1 // RUN: %clang_cc1 -triple x86_64-unknown-windows -emit-llvm -target-cpu core2 -o - %s | FileCheck %s
2 
3 #define SWIFTCALL __attribute__((swiftcall))
4 #define OUT __attribute__((swift_indirect_result))
5 #define ERROR __attribute__((swift_error_result))
6 #define CONTEXT __attribute__((swift_context))
7 
8 /*****************************************************************************/
9 /****************************** PARAMETER ABIS *******************************/
10 /*****************************************************************************/
11 
12 // Swift doesn't use inalloca like windows x86 normally does.
13 struct NonTrivial {
14   NonTrivial();
15   NonTrivial(const NonTrivial &);
16   int o;
17 };
18 
receiveNonTrivial(NonTrivial o)19 SWIFTCALL int receiveNonTrivial(NonTrivial o) { return o.o; }
20 
21 // CHECK-LABEL: define dso_local swiftcc noundef i32 @"?receiveNonTrivial@@YSHUNonTrivial@@@Z"(ptr noundef %o)
22 
passNonTrivial()23 int passNonTrivial() {
24   return receiveNonTrivial({});
25 }
26 
27 // CHECK-LABEL: define dso_local noundef i32 @"?passNonTrivial@@YAHXZ"()
28 // CHECK-NOT: stacksave
29 // CHECK: call swiftcc noundef i32 @"?receiveNonTrivial@@YSHUNonTrivial@@@Z"(ptr noundef %{{.*}})
30