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llvm-project/clang/test/CodeGenCXX/cxx11-thread-local-reference.cpp

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[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition Summary: Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults to -fsemantic-interposition). Users need to specify -fsemantic-interposition to get semantic interposition behavior. Semantic interposition is currently a best-effort feature. There may still be some cases where it is not handled well. Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D73865
2020-02-02 12:23:47 -08:00
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu -fsemantic-interposition | FileCheck --check-prefix=CHECK --check-prefix=LINUX %s
[TLS on Darwin] change how we handle globals with linkonce or weak linkage. This is about how we handle static member of a template. Before this commit, we use internal linkage for the IR thread-local variable, which is inefficient. With this commit, we will start to follow Itanium C++ ABI. rdar://problem/23415206 Reviewed by John McCall. llvm-svn: 252814
2015-11-11 22:42:31 +00:00
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-apple-darwin12 | FileCheck --check-prefix=CHECK --check-prefix=DARWIN %s
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
int &f();
[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition Summary: Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults to -fsemantic-interposition). Users need to specify -fsemantic-interposition to get semantic interposition behavior. Semantic interposition is currently a best-effort feature. There may still be some cases where it is not handled well. Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D73865
2020-02-02 12:23:47 -08:00
// LINUX: @r = thread_local dso_local global i32* null
[TLS on Darwin] change how we handle globals with linkonce or weak linkage. This is about how we handle static member of a template. Before this commit, we use internal linkage for the IR thread-local variable, which is inefficient. With this commit, we will start to follow Itanium C++ ABI. rdar://problem/23415206 Reviewed by John McCall. llvm-svn: 252814
2015-11-11 22:42:31 +00:00
// DARWIN: @r = internal thread_local global i32* null
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
thread_local int &r = f();
[TLS on Darwin] change how we handle globals with linkonce or weak linkage. This is about how we handle static member of a template. Before this commit, we use internal linkage for the IR thread-local variable, which is inefficient. With this commit, we will start to follow Itanium C++ ABI. rdar://problem/23415206 Reviewed by John McCall. llvm-svn: 252814
2015-11-11 22:42:31 +00:00
// LINUX: @_ZTH1r = alias void (), void ()* @__tls_init
// DARWIN: @_ZTH1r = internal alias void (), void ()* @__tls_init
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
int &g() { return r; }
// CHECK: define {{.*}} @[[R_INIT:.*]]()
Mark C++ reference parameters as dereferenceable Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
2014-07-18 15:52:10 +00:00
// CHECK: call dereferenceable({{[0-9]+}}) i32* @_Z1fv()
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
// CHECK: store i32* %{{.*}}, i32** @r, align 8
[CodeGenModule] Assume dso_local for -fpic -fno-semantic-interposition Summary: Clang -fpic defaults to -fno-semantic-interposition (GCC -fpic defaults to -fsemantic-interposition). Users need to specify -fsemantic-interposition to get semantic interposition behavior. Semantic interposition is currently a best-effort feature. There may still be some cases where it is not handled well. Reviewers: peter.smith, rnk, serge-sans-paille, sfertile, jfb, jdoerfert Subscribers: dschuff, jyknight, dylanmckay, nemanjai, jvesely, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, arphaman, PkmX, jocewei, jsji, Jim, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D73865
2020-02-02 12:23:47 -08:00
// CHECK-LABEL: define dso_local dereferenceable({{[0-9]+}}) i32* @_Z1gv()
[TLS on Darwin] use CXX_FAST_TLS calling convention for access functions. Also set nounwind attribute. rdar://problem/9001553 llvm-svn: 255860
2015-12-17 00:42:36 +00:00
// LINUX: call i32* @_ZTW1r()
// DARWIN: call cxx_fast_tlscc i32* @_ZTW1r()
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
// CHECK: ret i32* %{{.*}}
[ItaniumCXXABI] Make tls wrappers properly comdat Just marking a symbol as weak_odr/linkonce_odr isn't enough for actually tolerating multiple copies of it at linking on windows, it has to be made a proper comdat; make it comdat for all platforms for consistency. This should hopefully fix https://bugzilla.mozilla.org/show_bug.cgi?id=1566288. Differential Revision: https://reviews.llvm.org/D71572
2019-12-17 00:20:32 +02:00
// LINUX: define weak_odr hidden i32* @_ZTW1r() [[ATTR0:#[0-9]+]] comdat {
[CodeGen] Attach attributes to thread local wrapper function. This commit is a follow-up to r251734, r251476, and r249735, which fixes a bug where function attributes were not attached to thread local wrapper functions. rdar://problem/20828324 llvm-svn: 257865
2016-01-15 03:34:06 +00:00
// DARWIN: define cxx_fast_tlscc i32* @_ZTW1r() [[ATTR1:#[0-9]+]] {
[TLS on Darwin] use CXX_FAST_TLS calling convention for tls_init. This makes sure we don't generate a lot of code to spill/reload CSRs when calling tls_init from the access functions. This helps performance when tls_init is not inlined into the access functions. llvm-svn: 263854
2016-03-18 23:35:21 +00:00
// LINUX: call void @_ZTH1r()
// DARWIN: call cxx_fast_tlscc void @_ZTH1r()
Update Clang tests to handle explicitly typed load changes in LLVM. llvm-svn: 230795
2015-02-27 21:19:58 +00:00
// CHECK: load i32*, i32** @r, align 8
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
// CHECK: ret i32* %{{.*}}
[TLS on Darwin] use CXX_FAST_TLS calling convention for tls_init. This makes sure we don't generate a lot of code to spill/reload CSRs when calling tls_init from the access functions. This helps performance when tls_init is not inlined into the access functions. llvm-svn: 263854
2016-03-18 23:35:21 +00:00
// LINUX-LABEL: define internal void @__tls_init()
// DARWIN-LABEL: define internal cxx_fast_tlscc void @__tls_init()
Implement CodeGen for C++11 thread_local, following the Itanium ABI specification as discussed on cxx-abi-dev. llvm-svn: 179858
2013-04-19 16:42:07 +00:00
// CHECK: call void @[[R_INIT]]()
[TLS on Darwin] use CXX_FAST_TLS calling convention for access functions. Also set nounwind attribute. rdar://problem/9001553 llvm-svn: 255860
2015-12-17 00:42:36 +00:00
[CodeGen] Attach attributes to thread local wrapper function. This commit is a follow-up to r251734, r251476, and r249735, which fixes a bug where function attributes were not attached to thread local wrapper functions. rdar://problem/20828324 llvm-svn: 257865
2016-01-15 03:34:06 +00:00
// LINUX: attributes [[ATTR0]] = { {{.*}}"target-features"{{.*}} }
// DARWIN: attributes [[ATTR1]] = { {{.*}}nounwind{{.*}}"target-features"{{.*}} }
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