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llvm-project/clang/test/CodeGen/attr-target-mv.c

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Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=LINUX
// RUN: %clang_cc1 -triple x86_64-windows-pc -emit-llvm %s -o - | FileCheck %s --check-prefix=WINDOWS
Implement Attribute Target MultiVersioning GCC's attribute 'target', in addition to being an optimization hint, also allows function multiversioning. We currently have the former implemented, this is the latter's implementation. This works by enabling functions with the same name/signature to coexist, so that they can all be emitted. Multiversion state is stored in the FunctionDecl itself, and SemaDecl manages the definitions. Note that it ends up having to permit redefinition of functions so that they can all be emitted. Additionally, all versions of the function must be emitted, so this also manages that. Note that this includes some additional rules that GCC does not, since defining something as a MultiVersion function after a usage has been made illegal. The only 'history rewriting' that happens is if a function is emitted before it has been converted to a multiversion'ed function, at which point its name needs to be changed. Function templates and virtual functions are NOT yet supported (not supported in GCC either). Additionally, constructors/destructors are disallowed, but the former is planned. llvm-svn: 322028
2018-01-09 05:34:17 +08:00
int __attribute__((target("sse4.2"))) foo(void) { return 0; }
int __attribute__((target("arch=sandybridge"))) foo(void);
int __attribute__((target("arch=ivybridge"))) foo(void) {return 1;}
int __attribute__((target("default"))) foo(void) { return 2; }
int bar() {
return foo();
}
inline int __attribute__((target("sse4.2"))) foo_inline(void) { return 0; }
inline int __attribute__((target("arch=sandybridge"))) foo_inline(void);
inline int __attribute__((target("arch=ivybridge"))) foo_inline(void) {return 1;}
inline int __attribute__((target("default"))) foo_inline(void) { return 2; }
int bar2() {
return foo_inline();
}
inline __attribute__((target("default"))) void foo_decls(void);
inline __attribute__((target("sse4.2"))) void foo_decls(void);
void bar3() {
foo_decls();
}
inline __attribute__((target("default"))) void foo_decls(void) {}
inline __attribute__((target("sse4.2"))) void foo_decls(void) {}
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
inline __attribute__((target("default"))) void foo_multi(int i, double d) {}
inline __attribute__((target("avx,sse4.2"))) void foo_multi(int i, double d) {}
inline __attribute__((target("sse4.2,fma4"))) void foo_multi(int i, double d) {}
inline __attribute__((target("arch=ivybridge,fma4,sse4.2"))) void foo_multi(int i, double d) {}
[CodeGen] Fix a crash on mangling multiversioned functions `multiVersionSortPriority` expects features to have no prefix. We currently carry them around in the format "+${feature}". llvm-svn: 322618
2018-01-17 12:46:04 +08:00
void bar4() {
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
foo_multi(1, 5.0);
[CodeGen] Fix a crash on mangling multiversioned functions `multiVersionSortPriority` expects features to have no prefix. We currently carry them around in the format "+${feature}". llvm-svn: 322618
2018-01-17 12:46:04 +08:00
}
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
int fwd_decl_default(void);
int __attribute__((target("default"))) fwd_decl_default(void) { return 2; }
int fwd_decl_avx(void);
int __attribute__((target("avx"))) fwd_decl_avx(void) { return 2; }
int __attribute__((target("default"))) fwd_decl_avx(void) { return 2; }
void bar5() {
fwd_decl_default();
fwd_decl_avx();
}
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: @foo.ifunc = weak_odr ifunc i32 (), i32 ()* ()* @foo.resolver
// LINUX: @foo_inline.ifunc = weak_odr ifunc i32 (), i32 ()* ()* @foo_inline.resolver
// LINUX: @foo_decls.ifunc = weak_odr ifunc void (), void ()* ()* @foo_decls.resolver
// LINUX: @foo_multi.ifunc = weak_odr ifunc void (i32, double), void (i32, double)* ()* @foo_multi.resolver
// LINUX: @fwd_decl_default.ifunc = weak_odr ifunc i32 (), i32 ()* ()* @fwd_decl_default.resolver
// LINUX: @fwd_decl_avx.ifunc = weak_odr ifunc i32 (), i32 ()* ()* @fwd_decl_avx.resolver
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: define i32 @foo.sse4.2()
// LINUX: ret i32 0
// LINUX: define i32 @foo.arch_ivybridge()
// LINUX: ret i32 1
// LINUX: define i32 @foo()
// LINUX: ret i32 2
// LINUX: define i32 @bar()
// LINUX: call i32 @foo.ifunc()
// WINDOWS: define dso_local i32 @foo.sse4.2()
// WINDOWS: ret i32 0
// WINDOWS: define dso_local i32 @foo.arch_ivybridge()
// WINDOWS: ret i32 1
// WINDOWS: define dso_local i32 @foo()
// WINDOWS: ret i32 2
// WINDOWS: define dso_local i32 @bar()
// WINDOWS: call i32 @foo.resolver()
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr i32 ()* @foo.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: call void @__cpu_indicator_init()
// LINUX: ret i32 ()* @foo.arch_sandybridge
// LINUX: ret i32 ()* @foo.arch_ivybridge
// LINUX: ret i32 ()* @foo.sse4.2
// LINUX: ret i32 ()* @foo
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local i32 @foo.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// WINDOWS: call void @__cpu_indicator_init()
// WINDOWS: call i32 @foo.arch_sandybridge
// WINDOWS: call i32 @foo.arch_ivybridge
// WINDOWS: call i32 @foo.sse4.2
// WINDOWS: call i32 @foo
// LINUX: define i32 @bar2()
// LINUX: call i32 @foo_inline.ifunc()
// WINDOWS: define dso_local i32 @bar2()
// WINDOWS: call i32 @foo_inline.resolver()
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr i32 ()* @foo_inline.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: call void @__cpu_indicator_init()
// LINUX: ret i32 ()* @foo_inline.arch_sandybridge
// LINUX: ret i32 ()* @foo_inline.arch_ivybridge
// LINUX: ret i32 ()* @foo_inline.sse4.2
// LINUX: ret i32 ()* @foo_inline
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local i32 @foo_inline.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// WINDOWS: call void @__cpu_indicator_init()
// WINDOWS: call i32 @foo_inline.arch_sandybridge
// WINDOWS: call i32 @foo_inline.arch_ivybridge
// WINDOWS: call i32 @foo_inline.sse4.2
// WINDOWS: call i32 @foo_inline
// LINUX: define void @bar3()
// LINUX: call void @foo_decls.ifunc()
// WINDOWS: define dso_local void @bar3()
// WINDOWS: call void @foo_decls.resolver()
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr void ()* @foo_decls.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: ret void ()* @foo_decls.sse4.2
// LINUX: ret void ()* @foo_decls
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local void @foo_decls.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// WINDOWS: call void @foo_decls.sse4.2
Fix spelling of WINDOWS in a test Change-Id: I232515655359f14308e1c5509c4b7db96d1fafcb llvm-svn: 348598
2018-12-07 23:06:43 +08:00
// WINDOWS: call void @foo_decls
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: define void @bar4()
// LINUX: call void @foo_multi.ifunc(i32 1, double 5.{{[0+e]*}})
// WINDOWS: define dso_local void @bar4()
// WINDOWS: call void @foo_multi.resolver(i32 1, double 5.{{[0+e]*}})
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr void (i32, double)* @foo_multi.resolver() comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// LINUX: and i32 %{{.*}}, 4352
// LINUX: icmp eq i32 %{{.*}}, 4352
// LINUX: ret void (i32, double)* @foo_multi.fma4_sse4.2
// LINUX: icmp eq i32 %{{.*}}, 12
// LINUX: and i32 %{{.*}}, 4352
// LINUX: icmp eq i32 %{{.*}}, 4352
// LINUX: ret void (i32, double)* @foo_multi.arch_ivybridge_fma4_sse4.2
// LINUX: and i32 %{{.*}}, 768
// LINUX: icmp eq i32 %{{.*}}, 768
// LINUX: ret void (i32, double)* @foo_multi.avx_sse4.2
// LINUX: ret void (i32, double)* @foo_multi
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local void @foo_multi.resolver(i32 %0, double %1) comdat
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// WINDOWS: and i32 %{{.*}}, 4352
// WINDOWS: icmp eq i32 %{{.*}}, 4352
// WINDOWS: call void @foo_multi.fma4_sse4.2(i32 %0, double %1)
// WINDOWS-NEXT: ret void
// WINDOWS: icmp eq i32 %{{.*}}, 12
// WINDOWS: and i32 %{{.*}}, 4352
// WINDOWS: icmp eq i32 %{{.*}}, 4352
// WINDOWS: call void @foo_multi.arch_ivybridge_fma4_sse4.2(i32 %0, double %1)
// WINDOWS-NEXT: ret void
// WINDOWS: and i32 %{{.*}}, 768
// WINDOWS: icmp eq i32 %{{.*}}, 768
// WINDOWS: call void @foo_multi.avx_sse4.2(i32 %0, double %1)
// WINDOWS-NEXT: ret void
// WINDOWS: call void @foo_multi(i32 %0, double %1)
// WINDOWS-NEXT: ret void
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// LINUX: define i32 @fwd_decl_default()
// LINUX: ret i32 2
// LINUX: define i32 @fwd_decl_avx.avx()
// LINUX: ret i32 2
// LINUX: define i32 @fwd_decl_avx()
// LINUX: ret i32 2
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// WINDOWS: define dso_local i32 @fwd_decl_default()
// WINDOWS: ret i32 2
// WINDOWS: define dso_local i32 @fwd_decl_avx.avx()
// WINDOWS: ret i32 2
// WINDOWS: define dso_local i32 @fwd_decl_avx()
// WINDOWS: ret i32 2
// LINUX: define void @bar5()
// LINUX: call i32 @fwd_decl_default.ifunc()
// LINUX: call i32 @fwd_decl_avx.ifunc()
// WINDOWS: define dso_local void @bar5()
// WINDOWS: call i32 @fwd_decl_default.resolver()
// WINDOWS: call i32 @fwd_decl_avx.resolver()
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr i32 ()* @fwd_decl_default.resolver() comdat
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// LINUX: call void @__cpu_indicator_init()
// LINUX: ret i32 ()* @fwd_decl_default
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// LINUX: define weak_odr i32 ()* @fwd_decl_avx.resolver() comdat
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// LINUX: call void @__cpu_indicator_init()
// LINUX: ret i32 ()* @fwd_decl_avx.avx
// LINUX: ret i32 ()* @fwd_decl_avx
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local i32 @fwd_decl_default.resolver() comdat
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// WINDOWS: call void @__cpu_indicator_init()
// WINDOWS: call i32 @fwd_decl_default
[CodeGen] Add alias for cpu_dispatch function with IFunc & Fix resolver linkage type Multi-versioned functions defined by cpu_dispatch and implemented with IFunc can not be called outside the translation units where they are defined due to lack of symbols. This patch add function aliases for these functions and thus make them visible outside. Differential Revision: https://reviews.llvm.org/D67058 Patch by Senran Zhang llvm-svn: 371586
2019-09-11 09:54:48 +08:00
// WINDOWS: define weak_odr dso_local i32 @fwd_decl_avx.resolver() comdat
Correct 'target' default behavior on redecl, allow forward declaration. Declarations without the attribute were disallowed because it would be ambiguous which 'target' it was supposed to be on. For example: void ___attribute__((target("v1"))) foo(); void foo(); // Redecl of above, or fwd decl of below? void ___attribute__((target("v2"))) foo(); However, a first declaration doesn't have that problem, and erroring prevents it from working in cases where the forward declaration is useful. Additionally, a forward declaration of target==default wouldn't properly cause multiversioning, so this patch fixes that. The patch was not split since the 'default' fix would require implementing the same check for that case, followed by undoing the same change for the fwd-decl implementation. Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0 llvm-svn: 347805
2018-11-29 04:58:43 +08:00
// WINDOWS: call void @__cpu_indicator_init()
// WINDOWS: call i32 @fwd_decl_avx.avx
// WINDOWS: call i32 @fwd_decl_avx
// LINUX: declare i32 @foo.arch_sandybridge()
Implement Function Multiversioning for Non-ELF Systems. Similar to how ICC handles CPU-Dispatch on Windows, this patch uses the resolver function directly to forward the call to the proper function. This is not nearly as efficient as IFuncs of course, but is still quite useful for large functions specifically developed for certain processors. This is unfortunately still limited to x86, since it depends on __builtin_cpu_supports and __builtin_cpu_is, which are x86 builtins. The naming for the resolver/forwarding function for cpu-dispatch was taken from ICC's implementation, which uses the unmodified name for this (no mangling additions). This is possible, since cpu-dispatch uses '.A' for the 'default' version. In 'target' multiversioning, this function keeps the '.resolver' extension in order to keep the default function keeping the default mangling. Change-Id: I4731555a39be26c7ad59a2d8fda6fa1a50f73284 Differential Revision: https://reviews.llvm.org/D53586 llvm-svn: 345298
2018-10-26 02:57:19 +08:00
// WINDOWS: declare dso_local i32 @foo.arch_sandybridge()
// LINUX: define linkonce i32 @foo_inline.sse4.2()
// LINUX: ret i32 0
// WINDOWS: define linkonce_odr dso_local i32 @foo_inline.sse4.2()
// WINDOWS: ret i32 0
// LINUX: declare i32 @foo_inline.arch_sandybridge()
// WINDOWS: declare dso_local i32 @foo_inline.arch_sandybridge()
Revert "Multiversioning- Ensure all MV functions are emitted." This reverts commit 65df29f9318ac13a633c0ce13b2b0bccf06e79ca. AS suggested by @rsmith here: https://reviews.llvm.org/rL345839 I'm reverting this and solving the initial problem in a different way. llvm-svn: 348595
2018-12-07 22:56:50 +08:00
// LINUX: define linkonce i32 @foo_inline.arch_ivybridge()
// LINUX: ret i32 1
// LINUX: define linkonce i32 @foo_inline()
// LINUX: ret i32 2
// WINDOWS: define linkonce_odr dso_local i32 @foo_inline.arch_ivybridge()
// WINDOWS: ret i32 1
// WINDOWS: define linkonce_odr dso_local i32 @foo_inline()
// WINDOWS: ret i32 2
// LINUX: define linkonce void @foo_decls()
// LINUX: define linkonce void @foo_decls.sse4.2()
// WINDOWS: define linkonce_odr dso_local void @foo_decls()
// WINDOWS: define linkonce_odr dso_local void @foo_decls.sse4.2()
Make CPUDispatch resolver emit dependent functions. Inline cpu_specific versions referenced before the cpu_dispatch function weren't properly emitted, since they hadn't been referred to. This patch ensures that during resolver generation that all appropriate versions are emitted. Change-Id: I94c3766aaf9c75ca07a0ad8258efdbb834654ff8 llvm-svn: 348600
2018-12-07 23:31:23 +08:00
// LINUX: define linkonce void @foo_multi(i32 %{{[^,]+}}, double %{{[^\)]+}})
Revert "Multiversioning- Ensure all MV functions are emitted." This reverts commit 65df29f9318ac13a633c0ce13b2b0bccf06e79ca. AS suggested by @rsmith here: https://reviews.llvm.org/rL345839 I'm reverting this and solving the initial problem in a different way. llvm-svn: 348595
2018-12-07 22:56:50 +08:00
// LINUX: define linkonce void @foo_multi.avx_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})
// LINUX: define linkonce void @foo_multi.fma4_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})
// LINUX: define linkonce void @foo_multi.arch_ivybridge_fma4_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})
Make CPUDispatch resolver emit dependent functions. Inline cpu_specific versions referenced before the cpu_dispatch function weren't properly emitted, since they hadn't been referred to. This patch ensures that during resolver generation that all appropriate versions are emitted. Change-Id: I94c3766aaf9c75ca07a0ad8258efdbb834654ff8 llvm-svn: 348600
2018-12-07 23:31:23 +08:00
// WINDOWS: define linkonce_odr dso_local void @foo_multi(i32 %{{[^,]+}}, double %{{[^\)]+}})
Revert "Multiversioning- Ensure all MV functions are emitted." This reverts commit 65df29f9318ac13a633c0ce13b2b0bccf06e79ca. AS suggested by @rsmith here: https://reviews.llvm.org/rL345839 I'm reverting this and solving the initial problem in a different way. llvm-svn: 348595
2018-12-07 22:56:50 +08:00
// WINDOWS: define linkonce_odr dso_local void @foo_multi.avx_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})
// WINDOWS: define linkonce_odr dso_local void @foo_multi.fma4_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})
// WINDOWS: define linkonce_odr dso_local void @foo_multi.arch_ivybridge_fma4_sse4.2(i32 %{{[^,]+}}, double %{{[^\)]+}})