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.
50 lines
789 B
C++
50 lines
789 B
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
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struct A {
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void f();
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int a;
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};
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struct B : A {
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double b;
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};
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void f() {
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B b;
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b.f();
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}
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// CHECK: define{{.*}} %struct.B* @_Z1fP1A(%struct.A* %a) [[NUW:#[0-9]+]]
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B *f(A *a) {
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// CHECK-NOT: br label
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// CHECK: ret %struct.B*
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return static_cast<B*>(a);
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}
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// PR5965
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namespace PR5965 {
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// CHECK: define{{.*}} %struct.A* @_ZN6PR59651fEP1B(%struct.B* %b) [[NUW]]
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A *f(B* b) {
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// CHECK-NOT: br label
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// CHECK: ret %struct.A*
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return b;
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}
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}
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// Don't crash on a derived-to-base conversion of an r-value
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// aggregate.
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namespace test3 {
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struct A {};
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struct B : A {};
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void foo(A a);
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void test() {
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foo(B());
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}
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}
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// CHECK: attributes [[NUW]] = { noinline nounwind{{.*}} }
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