mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 03:56:08 +00:00
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 `{{.*}} `.
16 lines
514 B
C++
16 lines
514 B
C++
// RUN: %clang_cc1 %s -emit-llvm -o - -triple x86_64-linux-gnu | FileCheck %s
|
|
|
|
struct A { void *p; void *q; void *r; };
|
|
|
|
struct B : A {};
|
|
static_assert(sizeof(B) == 24);
|
|
|
|
// CHECK: define{{.*}} nonnull align 8 dereferenceable(24) {{.*}} @_Z1fR1B({{.*}} nonnull align 8 dereferenceable(24)
|
|
B &f(B &b) { return b; }
|
|
|
|
struct C : virtual A {};
|
|
static_assert(sizeof(C) == 32);
|
|
|
|
// CHECK: define{{.*}} nonnull align 8 dereferenceable(8) {{.*}} @_Z1fR1C({{.*}} nonnull align 8 dereferenceable(8)
|
|
C &f(C &c) { return c; }
|