9ca1b94a6d
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
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=LINUX
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// RUN: %clang_cc1 -triple x86_64-windows-pc -emit-llvm %s -o - | FileCheck %s --check-prefix=WINDOWS
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int __attribute__((target("sse4.2"))) foo(int i) { return 0; }
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int __attribute__((target("arch=sandybridge"))) foo(int);
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int __attribute__((target("arch=ivybridge"))) foo(int i) {return 1;}
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int __attribute__((target("default"))) foo(int i) { return 2; }
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typedef int (*FuncPtr)(int);
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void func(FuncPtr);
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int bar() {
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func(foo);
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FuncPtr Free = &foo;
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FuncPtr Free2 = foo;
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return 0;
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return Free(1) + Free(2);
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}
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// LINUX: @foo.ifunc = weak_odr ifunc i32 (i32), i32 (i32)* ()* @foo.resolver
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// LINUX: define i32 @foo.sse4.2(
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// LINUX: ret i32 0
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// LINUX: define i32 @foo.arch_ivybridge(
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// LINUX: ret i32 1
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// LINUX: define i32 @foo(
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// LINUX: ret i32 2
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// WINDOWS: define dso_local i32 @foo.sse4.2(
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// WINDOWS: ret i32 0
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// WINDOWS: define dso_local i32 @foo.arch_ivybridge(
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// WINDOWS: ret i32 1
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// WINDOWS: define dso_local i32 @foo(
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// WINDOWS: ret i32 2
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// LINUX: define i32 @bar()
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// LINUX: call void @func(i32 (i32)* @foo.ifunc)
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// LINUX: store i32 (i32)* @foo.ifunc
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// LINUX: store i32 (i32)* @foo.ifunc
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// WINDOWS: define dso_local i32 @bar()
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// WINDOWS: call void @func(i32 (i32)* @foo.resolver)
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// WINDOWS: store i32 (i32)* @foo.resolver
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// WINDOWS: store i32 (i32)* @foo.resolver
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// LINUX: declare i32 @foo.arch_sandybridge(
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// WINDOWS: declare dso_local i32 @foo.arch_sandybridge(
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