df931ce82c
linkage specification, and is marked as __attribute__((used)), try to also give it the unmangled name (by emitting an internal linkage alias) if nothing else within the translation unit would use that name. This allows inline asm in that translation unit to use the entity via its unmangled name, which people apparently rely on. llvm-svn: 178950
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
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namespace foo {
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// CHECK-NOT: @a = global i32
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extern "C" int a;
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// CHECK-NOT: @_ZN3foo1bE = global i32
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extern int b;
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// CHECK: @_ZN3foo1cE = global i32
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int c = 5;
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// CHECK-NOT: @_ZN3foo1dE
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extern "C" struct d;
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}
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namespace test1 {
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namespace {
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struct X {};
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}
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extern "C" {
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// CHECK: @test1_b = global
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X test1_b = X();
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}
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void *use = &test1_b;
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// CHECK: @_ZN5test13useE = global
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}
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namespace test2 {
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namespace {
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struct X {};
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}
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// CHECK: @test2_b = global
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extern "C" X test2_b;
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X test2_b;
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}
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extern "C" {
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static int unused_var;
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static int unused_fn() { return 0; }
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__attribute__((used)) static int internal_var;
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__attribute__((used)) static int internal_fn() { return 0; }
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__attribute__((used)) static int duplicate_internal_var;
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__attribute__((used)) static int duplicate_internal_fn() { return 0; }
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namespace N {
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__attribute__((used)) static int duplicate_internal_var;
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__attribute__((used)) static int duplicate_internal_fn() { return 0; }
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}
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// CHECK: @llvm.used = appending global {{.*}} @internal_var {{.*}} @internal_fn
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// CHECK-NOT: @unused
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// CHECK-NOT: @duplicate_internal
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// CHECK: @internal_var = alias internal i32* @_Z12internal_var
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// CHECK-NOT: @unused
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// CHECK-NOT: @duplicate_internal
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// CHECK: @internal_fn = alias internal i32 ()* @_Z11internal_fnv
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// CHECK-NOT: @unused
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// CHECK-NOT: @duplicate_internal
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}
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