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CodeGenCXX: support PreserveMostCC in MS ABI 

Microsoft has reserved 'U' for the PreserveMostCC which is used in the
swift runtime.  Add support for this.  This allows the swift runtime to
be built for Windows again.

llvm-svn: 329025
This commit is contained in:
Saleem Abdulrasool 2018-04-02 22:25:50 +00:00
parent 30b215e8f7
commit 13aeee0d36
3 changed files with 45 additions and 4 deletions
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1
clang/lib/AST/MicrosoftMangle.cpp
View File

@ -2184,6 +2184,7 @@ void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
case CC_X86FastCall: Out << 'I'; break;
case CC_X86VectorCall: Out << 'Q'; break;
case CC_Swift: Out << 'S'; break;
case CC_PreserveMost: Out << 'U'; break;
case CC_X86RegCall: Out << 'w'; break;
}
}

1
clang/lib/Basic/Targets/X86.h
View File

@ -287,6 +287,7 @@ public:
case CC_X86VectorCall:
case CC_X86RegCall:
case CC_C:
case CC_PreserveMost:
case CC_Swift:
case CC_X86Pascal:
case CC_IntelOclBicc:

47
clang/test/CodeGenCXX/msabi-swiftcall-cc.cpp
View File

@ -1,28 +1,67 @@
// RUN: %clang_cc1 -triple i686-unknown-windows-msvc -fdeclspec -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -triple x86_64-unknown-windows-msvc -fdeclspec -emit-llvm %s -o - | FileCheck %s -check-prefix CHECK-64
void __attribute__((__swiftcall__)) f() {}
// CHECK-DAG: @"?f@@YSXXZ"
// CHECK-64-DAG: @"?f@@YSXXZ"
void (__attribute__((__swiftcall__)) *p)();
// CHECK-DAG: @"?p@@3P6SXXZA"
// CHECK-64-DAG: @"?p@@3P6SXXZEA
namespace {
void __attribute__((__swiftcall__)) __attribute__((__used__)) f() { }
// CHECK-DAG: "?f@?A@@YSXXZ"
}
// CHECK-DAG: @"?f@?A@@YSXXZ"
// CHECK-64-DAG: @"?f@?A@@YSXXZ"
namespace n {
void __attribute__((__swiftcall__)) f() {}
// CHECK-DAG: "?f@n@@YSXXZ"
}
// CHECK-DAG: @"?f@n@@YSXXZ"
// CHECK-64-DAG: @"?f@n@@YSXXZ"
struct __declspec(dllexport) S {
S(const S &) = delete;
S & operator=(const S &) = delete;
void __attribute__((__swiftcall__)) m() { }
// CHECK-DAG: "?m@S@@QASXXZ"
};
// CHECK-DAG: @"?m@S@@QASXXZ"
// CHECK-64-DAG: @"?m@S@@QEASXXZ"
void f(void (__attribute__((__swiftcall__))())) {}
// CHECK-DAG: "?f@@YAXP6SXXZ@Z"
// CHECK-DAG: @"?f@@YAXP6SXXZ@Z"
// CHECK-64-DAG: @"?f@@YAXP6SXXZ@Z"
void __attribute__((__preserve_most__)) g() {}
// CHECK-DAG: @"?g@@YUXXZ"
// CHECK-64-DAG: @"?g@@YUXXZ"
void (__attribute__((__preserve_most__)) *q)();
// CHECK-DAG: @"?q@@3P6UXXZA"
// CHECK-64-DAG: @"?q@@3P6UXXZEA"
namespace {
void __attribute__((__preserve_most__)) __attribute__((__used__)) g() {}
}
// CHECK-DAG: @"?g@?A@@YUXXZ"
// CHECK-64-DAG: @"?g@?A@@YUXXZ"
namespace n {
void __attribute__((__preserve_most__)) g() {}
}
// CHECK-DAG: @"?g@n@@YUXXZ"
// CHECK-64-DAG: @"?g@n@@YUXXZ"
struct __declspec(dllexport) T {
T(const T &) = delete;
T & operator=(const T &) = delete;
void __attribute__((__preserve_most__)) m() {}
};
// CHECK-DAG: @"?m@T@@QAUXXZ"
// CHECK-64-DAG: @"?m@T@@QEAUXXZ"
void g(void (__attribute__((__preserve_most__))())) {}
// CHECK-DAG: @"?g@@YAXP6UXXZ@Z"
// CHECK-64-DAG: @"?g@@YAXP6UXXZ@Z"