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[Clang][Cygwin] Use correct mangling rule #158404

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[Clang][Cygwin] Use correct mangling rule #158404

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3d88b0f
correct mangling rule
kikairoya Sep 13, 2025
7c39b80
test
kikairoya Sep 13, 2025
ba7912c
update mangle-windows.cpp
kikairoya Sep 13, 2025
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2 changes: 2 additions & 0 deletions clang/lib/Basic/Targets/X86.h
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Original file line number Diff line number Diff line change
Expand Up @@ -646,6 +646,7 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_32TargetInfo : public X86_32TargetInfo {
: X86_32TargetInfo(Triple, Opts) {
this->WCharType = TargetInfo::UnsignedShort;
this->WIntType = TargetInfo::UnsignedInt;
this->UseMicrosoftManglingForC = true;
DoubleAlign = LongLongAlign = 64;
resetDataLayout("e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-"
"i128:128-f80:32-n8:16:32-a:0:32-S32",
Expand Down Expand Up @@ -983,6 +984,7 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_64TargetInfo : public X86_64TargetInfo {
: X86_64TargetInfo(Triple, Opts) {
this->WCharType = TargetInfo::UnsignedShort;
this->WIntType = TargetInfo::UnsignedInt;
this->UseMicrosoftManglingForC = true;
}

void getTargetDefines(const LangOptions &Opts,
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6 changes: 4 additions & 2 deletions clang/test/CodeGen/mangle-windows.c
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@@ -1,8 +1,10 @@
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 | FileCheck %s
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-mingw32 | FileCheck %s
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-mingw32 | FileCheck %s
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-cygwin | FileCheck %s
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-windows-msvc-elf | FileCheck %s --check-prefix=ELF32
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-win32 | FileCheck %s --check-prefix=X64
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-mingw32 | FileCheck %s --check-prefix=X64
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-mingw32 | FileCheck %s --check-prefix=X64
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-cygwin | FileCheck %s --check-prefix=X64
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-windows-msvc-elf | FileCheck %s --check-prefix=ELF64

// CHECK: target datalayout = "e-m:x-{{.*}}"
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3 changes: 3 additions & 0 deletions clang/test/CodeGenCXX/mangle-windows.cpp
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Expand Up @@ -4,6 +4,9 @@
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-mingw32 | \
// RUN: FileCheck --check-prefix=ITANIUM %s

// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-cygwin | \
// RUN: FileCheck --check-prefix=ITANIUM %s

void __stdcall f1(void) {}
// WIN: define dso_local x86_stdcallcc void @"?f1@@YGXXZ"
// ITANIUM: define dso_local x86_stdcallcc void @"\01__Z2f1v@0"
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