clang/test/CodeGenCXX/windows-x86-swiftcall.cpp

   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
  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
  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 %{{.*}})