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Add MS ABI mangling for operator<=>. 

Thanks to Cameron DaCamara at Microsoft for letting us know what their
chosen mangling is here!

llvm-svn: 345330
This commit is contained in:
Richard Smith 2018-10-25 22:51:16 +00:00
parent 9e9606ec18
commit 1db7bd7a33
3 changed files with 16 additions and 13 deletions
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11
clang/lib/AST/MicrosoftMangle.cpp
View File

@ -1240,15 +1240,8 @@ void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
case OO_Array_Delete: Out << "?_V"; break;
// <operator-name> ::= ?__L # co_await
case OO_Coawait: Out << "?__L"; break;
case OO_Spaceship: {
// FIXME: Once MS picks a mangling, use it.
DiagnosticsEngine &Diags = Context.getDiags();
unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
"cannot mangle this three-way comparison operator yet");
Diags.Report(Loc, DiagID);
break;
}
// <operator-name> ::= ?__M # <=>
case OO_Spaceship: Out << "?__M"; break;
case OO_Conditional: {
DiagnosticsEngine &Diags = Context.getDiags();

12
clang/test/CodeGenCXX/cxx2a-three-way-comparison.cpp
View File

@ -1,24 +1,28 @@
// RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %itanium_abi_triple | FileCheck %s --check-prefix=ITANIUM
// RUN: not %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %ms_abi_triple 2>&1 | FileCheck %s --check-prefix=MSABI
// RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %itanium_abi_triple | FileCheck %s --check-prefixes=CHECK,ITANIUM
// RUN: %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %ms_abi_triple | FileCheck %s --check-prefixes=CHECK,MSABI
// RUN: not %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %itanium_abi_triple -DBUILTIN 2>&1 | FileCheck %s --check-prefix=BUILTIN
// MSABI: cannot mangle this three-way comparison operator yet
// RUN: not %clang_cc1 -std=c++2a -emit-llvm %s -o - -triple %ms_abi_triple -DBUILTIN 2>&1 | FileCheck %s --check-prefix=BUILTIN
struct A {
void operator<=>(int);
};
// ITANIUM: define {{.*}}@_ZN1AssEi(
// MSABI: define {{.*}}@"??__MA@@QEAAXH@Z"(
void A::operator<=>(int) {}
// ITANIUM: define {{.*}}@_Zssi1A(
// MSABI: define {{.*}}@"??__M@YAXHUA@@@Z"(
void operator<=>(int, A) {}
int operator<=>(A, A);
// ITANIUM: define {{.*}}_Z1f1A(
// MSABI: define {{.*}}"?f@@YAHUA@@@Z"(
int f(A a) {
// ITANIUM: %[[RET:.*]] = call {{.*}}_Zss1AS_(
// ITANIUM: ret i32 %[[RET]]
// MSABI: %[[RET:.*]] = call {{.*}}"??__M@YAHUA@@0@Z"(
// CHECK: ret i32 %[[RET]]
return a <=> a;
}

6
clang/test/CodeGenCXX/mangle-ms-cxx2a.cpp Normal file
View File

@ -0,0 +1,6 @@
// RUN: %clang_cc1 -std=c++2a -fms-extensions -emit-llvm %s -o - -triple=i386-pc-win32 -fms-compatibility-version=19.00 | FileCheck %s
struct A {};
// CHECK-DAG: define {{.*}} @"??__M@YAXUA@@0@Z"
void operator<=>(A, A) {}