[clang] [Cygwin] Enable TLS on Cygwin target (PR #138618)
https://github.com/kikairoya created
https://github.com/llvm/llvm-project/pull/138618
Cygwin environment and toolchain supports EMUTLS.
>From
>https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=config/tls.m4;hb=HEAD#l118,
```
$ LANG=C gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/15/lto-wrapper.exe Target:
x86_64-pc-cygwin
Configured with: (snip)
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250406 (experimental) (GCC)
$ echo '__thread int a; int b; int main() { return a = b; }' | gcc -S -xc -o- -
| grep __emutls_get_address
call__emutls_get_address
.def__emutls_get_address; .scl2; .type 32; .endef
```
>From de268f7f1d19de21ece1ab4c6b53c008bc33 Mon Sep 17 00:00:00 2001
From: kikairoya
Date: Sat, 19 Apr 2025 07:00:39 +0900
Subject: [PATCH] [Cygwin] TLS for Cygwin target should be available
Cygwin environment and toolchain supports EMUTLS.
>From
>https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=config/tls.m4;hb=HEAD#l118,
$ LANG=C gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/15/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with: (snip)
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250406 (experimental) (GCC)
$ echo '__thread int a; int b; int main() { return a = b; }' | \
gcc -S -xc -o- - | \
grep __emutls_get_address
call__emutls_get_address
.def__emutls_get_address; .scl2; .type 32; .endef
---
clang/lib/Basic/Targets/X86.h | 1 -
clang/test/Driver/emulated-tls.cpp | 6 ++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/clang/lib/Basic/Targets/X86.h b/clang/lib/Basic/Targets/X86.h
index 194f3faef1be3..2f6fb33a7b597 100644
--- a/clang/lib/Basic/Targets/X86.h
+++ b/clang/lib/Basic/Targets/X86.h
@@ -965,7 +965,6 @@ class LLVM_LIBRARY_VISIBILITY CygwinX86_64TargetInfo :
public X86_64TargetInfo {
CygwinX86_64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
: X86_64TargetInfo(Triple, Opts) {
this->WCharType = TargetInfo::UnsignedShort;
-TLSSupported = false;
}
void getTargetDefines(const LangOptions &Opts,
diff --git a/clang/test/Driver/emulated-tls.cpp
b/clang/test/Driver/emulated-tls.cpp
index 3ee901a835858..431105bdfdf45 100644
--- a/clang/test/Driver/emulated-tls.cpp
+++ b/clang/test/Driver/emulated-tls.cpp
@@ -8,6 +8,8 @@
// RUN: | FileCheck -check-prefix=NOEMU %s
// RUN: %clang -### --target=i686-pc-cygwin %s 2>&1 \
// RUN: | FileCheck -check-prefix=EMU %s
+// RUN: %clang -### --target=x86_64-pc-cygwin %s 2>&1 \
+// RUN: | FileCheck -check-prefix=EMU %s
// RUN: %clang -### --target=i686-pc-openbsd %s 2>&1 \
// RUN: | FileCheck -check-prefix=EMU %s
@@ -17,6 +19,8 @@
// RUN: | FileCheck -check-prefix=EMU %s
// RUN: %clang -### -target i686-pc-cygwin %s -fno-emulated-tls -femulated-tls
2>&1 \
// RUN: | FileCheck -check-prefix=EMU %s
+// RUN: %clang -### -target x86_64-pc-cygwin %s -fno-emulated-tls
-femulated-tls 2>&1 \
+// RUN: | FileCheck -check-prefix=EMU %s
// RUN: %clang -### -target i686-pc-openbsd %s -fno-emulated-tls
-femulated-tls 2>&1 \
// RUN: | FileCheck -check-prefix=EMU %s
@@ -26,6 +30,8 @@
// RUN: | FileCheck -check-prefix=NOEMU %s
// RUN: %clang -### -target i686-pc-cygwin %s -femulated-tls -fno-emulated-tls
2>&1 \
// RUN: | FileCheck -check-prefix=NOEMU %s
+// RUN: %clang -### -target x86_64-pc-cygwin %s -femulated-tls
-fno-emulated-tls 2>&1 \
+// RUN: | FileCheck -check-prefix=NOEMU %s
// RUN: %clang -### -target i686-pc-openbsd %s -femulated-tls
-fno-emulated-tls 2>&1 \
// RUN: | FileCheck -check-prefix=NOEMU %s
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[clang] [Cygwin] Export global symbols, template instantiations, RTTI and VTable are exported correctly (PR #138773)
https://github.com/kikairoya created
https://github.com/llvm/llvm-project/pull/138773
MinGW-GCC and MinGW-Clang exports these symbols.
Cygwin-GCC also exports them, so Cygwin-Clang should do so.
Some of tests have new DAG pattern because i686-cygwin don't use __thiscall but
__cdecl for member functions.
This is a prerequisite for resolve
https://github.com/llvm/llvm-project/issues/135910 .
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[clang] [Cygwin] Export global symbols, template instantiations, RTTI and VTable are exported correctly (PR #138773)
https://github.com/kikairoya edited https://github.com/llvm/llvm-project/pull/138773 ___ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
