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llvm-project/clang/test/CodeGenCXX/ms-thread_local.cpp

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MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
// RUN: %clang_cc1 %s -std=c++1y -triple=i686-pc-win32 -emit-llvm -o - | FileCheck %s
[CodeGen][TLS] Set TLS Model for __tls_guard as well. Differential Revision: https://reviews.llvm.org/D81543
2020-06-16 14:30:36 +08:00
// RUN: %clang_cc1 %s -std=c++1y -triple=i686-pc-win32 -ftls-model=local-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-LD
MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
struct A {
A();
~A();
};
[MS] Don't escape MS C++ names with \01 It is not needed after LLVM r327734. Now it will be easier to copy-paste IR symbol names from Clang. llvm-svn: 327738
2018-03-17 04:36:49 +08:00
// CHECK-DAG: $"??$a@X@@3UA@@A" = comdat any
// CHECK-DAG: @"??$a@X@@3UA@@A" = linkonce_odr dso_local thread_local global %struct.A zeroinitializer, comdat, align 1
// CHECK-DAG: @"??__E?$a@X@@YAXXZ$initializer$" = internal constant void ()* @"??__E?$a@X@@YAXXZ", section ".CRT$XDU", comdat($"??$a@X@@3UA@@A")
[CodeGen][TLS] Set TLS Model for __tls_guard as well. Differential Revision: https://reviews.llvm.org/D81543
2020-06-16 14:30:36 +08:00
// CHECK-LD-DAG: $"??$a@X@@3UA@@A" = comdat any
// CHECK-LD-DAG: @"??$a@X@@3UA@@A" = linkonce_odr dso_local thread_local(localdynamic) global %struct.A zeroinitializer, comdat, align 1
// CHECK-LD-DAG: @"??__E?$a@X@@YAXXZ$initializer$" = internal constant void ()* @"??__E?$a@X@@YAXXZ", section ".CRT$XDU", comdat($"??$a@X@@3UA@@A")
MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
template <typename T>
thread_local A a = A();
[MS] Don't escape MS C++ names with \01 It is not needed after LLVM r327734. Now it will be easier to copy-paste IR symbol names from Clang. llvm-svn: 327738
2018-03-17 04:36:49 +08:00
// CHECK-DAG: @"?b@@3UA@@A" = dso_local thread_local global %struct.A zeroinitializer, align 1
MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
// CHECK-DAG: @"__tls_init$initializer$" = internal constant void ()* @__tls_init, section ".CRT$XDU"
[CodeGen][TLS] Set TLS Model for __tls_guard as well. Differential Revision: https://reviews.llvm.org/D81543
2020-06-16 14:30:36 +08:00
// CHECK-LD-DAG: @"?b@@3UA@@A" = dso_local thread_local(localdynamic) global %struct.A zeroinitializer, align 1
// CHECK-LD-DAG: @"__tls_init$initializer$" = internal constant void ()* @__tls_init, section ".CRT$XDU"
MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
thread_local A b;
// CHECK-LABEL: define internal void @__tls_init()
[MS] Don't escape MS C++ names with \01 It is not needed after LLVM r327734. Now it will be easier to copy-paste IR symbol names from Clang. llvm-svn: 327738
2018-03-17 04:36:49 +08:00
// CHECK: call void @"??__Eb@@YAXXZ"
[CodeGen][TLS] Set TLS Model for __tls_guard as well. Differential Revision: https://reviews.llvm.org/D81543
2020-06-16 14:30:36 +08:00
// CHECK-LD-LABEL: define internal void @__tls_init()
// CHECK-LD: call void @"??__Eb@@YAXXZ"
MS ABI: Implement thread_local for global variables Summary: This add support for the C++11 feature, thread_local global variables. The ABI Clang implements is an improvement of the MSVC ABI. Sadly, further improvements could be made but not without sacrificing ABI compatibility. The feature is implemented as follows: - All thread_local initialization routines are pointed to from the .CRT$XDU section. - All non-weak thread_local variables have their initialization routines call from a single function instead of getting their own .CRT$XDU section entry. This is done to open up optimization opportunities to the compiler. - All weak thread_local variables have their own .CRT$XDU section entry. This entry is in a COMDAT with the global variable it is initializing; this ensures that we will initialize the global exactly once. - Destructors are registered in the initialization function using __tlregdtor. Differential Revision: http://reviews.llvm.org/D5597 llvm-svn: 219074
2014-10-05 13:05:40 +08:00
thread_local A &c = b;
thread_local A &d = c;
A f() {
(void)a<void>;
(void)b;
return c;
}
[MS ABI] Add /include directives for dynamic TLS MSVC emits /include directives in the .drective section for the __dyn_tls_init function (decorated as ___dyn_tls_init@12 for 32-bit). This fixes PR30347. llvm-svn: 281189
2016-09-12 10:51:43 +08:00
IR: Replace the "Linker Options" module flag with "llvm.linker.options" named metadata. The new metadata is easier to manipulate than module flags. Differential Revision: https://reviews.llvm.org/D31349 llvm-svn: 305227
2017-06-13 04:10:48 +08:00
// CHECK: !llvm.linker.options = !{![[dyn_tls_init:[0-9]+]]}
[MS ABI] Add /include directives for dynamic TLS MSVC emits /include directives in the .drective section for the __dyn_tls_init function (decorated as ___dyn_tls_init@12 for 32-bit). This fixes PR30347. llvm-svn: 281189
2016-09-12 10:51:43 +08:00
// CHECK: ![[dyn_tls_init]] = !{!"/include:___dyn_tls_init@12"}
[CodeGen][TLS] Set TLS Model for __tls_guard as well. Differential Revision: https://reviews.llvm.org/D81543
2020-06-16 14:30:36 +08:00
// CHECK-LD: !llvm.linker.options = !{![[dyn_tls_init:[0-9]+]]}
// CHECK-LD: ![[dyn_tls_init]] = !{!"/include:___dyn_tls_init@12"}