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6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-darwin10 -emit-llvm %s -o - > %t
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// RUN: FileCheck %s -check-prefix=CHECK-1 < %t
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// RUN: FileCheck %s -check-prefix=CHECK-2 < %t
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int f();
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namespace {
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// CHECK-1: @_ZN12_GLOBAL__N_11bE = internal global i32 0
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// CHECK-1: @_ZN12_GLOBAL__N_11cE = internal global i32 0
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// CHECK-1: @_ZN12_GLOBAL__N_12c2E = internal global i32 0
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// CHECK-1: @_ZN12_GLOBAL__N_11D1dE = internal global i32 0
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// CHECK-1: @_ZN12_GLOBAL__N_11aE = internal global i32 0
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int a = 0;
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int b = f();
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static int c = f();
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// Note, we can't use an 'L' mangling for c or c2 (like GCC does) based on
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// the 'static' specifier, because the variable can be redeclared without it.
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extern int c2;
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int g() { return c2; }
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static int c2 = f();
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class D {
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static int d;
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};
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int D::d = f();
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// Check for generation of a VTT with internal linkage
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// CHECK-1: @_ZTSN12_GLOBAL__N_11X1EE = internal constant
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struct X {
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struct EBase { };
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struct E : public virtual EBase { virtual ~E() {} };
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};
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// CHECK-1-LABEL: define internal i32 @_ZN12_GLOBAL__N_13fooEv()
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int foo() {
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return 32;
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}
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// CHECK-1-LABEL: define internal i32 @_ZN12_GLOBAL__N_11A3fooEv()
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namespace A {
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int foo() {
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return 45;
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}
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}
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}
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int concrete() {
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return a + foo() + A::foo();
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}
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void test_XE() { throw X::E(); }
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// Miscompile on llvmc plugins.
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namespace test2 {
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struct A {
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template <class T> struct B {
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static void foo() {}
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};
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};
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namespace {
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struct C;
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}
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// CHECK-2-LABEL: define{{.*}} void @_ZN5test24testEv()
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// CHECK-2: call void @_ZN5test21A1BINS_12_GLOBAL__N_11CEE3fooEv()
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void test() {
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A::B<C>::foo();
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}
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// CHECK-2-LABEL: define internal void @_ZN5test21A1BINS_12_GLOBAL__N_11CEE3fooEv()
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}
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namespace {
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int bar() {
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extern int a;
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return a;
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}
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} // namespace
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