fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=LINUX
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-windows-pc -emit-llvm %s -o - | FileCheck %s --check-prefix=WINDOWS
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void temp();
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void temp(int);
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using FP = void(*)(int);
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void b() {
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FP f = temp;
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}
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int __attribute__((target("sse4.2"))) foo(int) { return 0; }
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int __attribute__((target("arch=sandybridge"))) foo(int);
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int __attribute__((target("arch=ivybridge"))) foo(int) {return 1;}
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int __attribute__((target("default"))) foo(int) { return 2; }
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struct S {
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int __attribute__((target("sse4.2"))) foo(int) { return 0; }
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int __attribute__((target("arch=sandybridge"))) foo(int);
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int __attribute__((target("arch=ivybridge"))) foo(int) {return 1;}
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int __attribute__((target("default"))) foo(int) { return 2; }
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};
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using FuncPtr = int (*)(int);
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using MemFuncPtr = int (S::*)(int);
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void f(FuncPtr, MemFuncPtr);
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int bar() {
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FuncPtr Free = &foo;
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MemFuncPtr Member = &S::foo;
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S s;
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f(foo, &S::foo);
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return Free(1) + (s.*Member)(2);
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}
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// LINUX: @_Z3fooi.ifunc
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// LINUX: @_ZN1S3fooEi.ifunc
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// LINUX: define{{.*}} i32 @_Z3barv()
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// Store to Free of ifunc
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// LINUX: store i32 (i32)* @_Z3fooi.ifunc
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// Store to Member of ifunc
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// LINUX: store { i64, i64 } { i64 ptrtoint (i32 (%struct.S*, i32)* @_ZN1S3fooEi.ifunc to i64), i64 0 }, { i64, i64 }* [[MEMBER:%[a-z]+]]
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// Call to 'f' with the ifunc
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// LINUX: call void @_Z1fPFiiEM1SFiiE(i32 (i32)* @_Z3fooi.ifunc
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// WINDOWS: define dso_local i32 @"?bar@@YAHXZ"()
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// Store to Free
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// WINDOWS: store i32 (i32)* @"?foo@@YAHH@Z.resolver", i32 (i32)**
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// Store to Member
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// WINDOWS: store i8* bitcast (i32 (%struct.S*, i32)* @"?foo@S@@QEAAHH@Z.resolver" to i8*), i8**
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// Call to 'f'
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// WINDOWS: call void @"?f@@YAXP6AHH@ZP8S@@EAAHH@Z@Z"(i32 (i32)* @"?foo@@YAHH@Z.resolver", i8* bitcast (i32 (%struct.S*, i32)* @"?foo@S@@QEAAHH@Z.resolver" to i8*))
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