mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 12:16:06 +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 `{{.*}} `.
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
// RUN: %clang_cc1 -x c -emit-llvm -triple arm-none-eabi -o - %s | FileCheck %s
|
|
|
|
// Test that section attributes are attached to C tentative definitions as per
|
|
// '#pragma clang section' directives.
|
|
|
|
#pragma clang section bss = ".bss.1"
|
|
int x; // bss.1
|
|
|
|
#pragma clang section bss = ""
|
|
int x; // stays in .bss.1
|
|
int y; // not assigned a section attribute
|
|
int z; // not assigned a section attribute
|
|
|
|
#pragma clang section bss = ".bss.2"
|
|
int x; // stays in .bss.1
|
|
int y; // .bss.2
|
|
|
|
// Test the same for `const` declarations.
|
|
#pragma clang section rodata = ".rodata.1"
|
|
const int cx; // rodata.1
|
|
|
|
#pragma clang section rodata = ""
|
|
const int cx; // stays in .rodata.1
|
|
const int cy; // not assigned a section attribute
|
|
const int cz; // not assigned a rodata section attribute
|
|
|
|
#pragma clang section rodata = ".rodata.2"
|
|
const int cx; // stays in .rodata.1
|
|
const int cy; // .rodata.2
|
|
|
|
// CHECK: @x ={{.*}} global i32 0, align 4 #0
|
|
// CHECK: @y ={{.*}} global i32 0, align 4 #1
|
|
// CHECK: @z ={{.*}} global i32 0, align 4
|
|
// CHECK: @cx ={{.*}} constant i32 0, align 4 #2
|
|
// CHECK: @cy ={{.*}} constant i32 0, align 4 #3
|
|
// CHECK: @cz ={{.*}} constant i32 0, align 4 #1
|
|
|
|
// CHECK: attributes #0 = { "bss-section"=".bss.1" }
|
|
// CHECK: attributes #1 = { "bss-section"=".bss.2" }
|
|
// CHECK: attributes #2 = { "bss-section"=".bss.2" "rodata-section"=".rodata.1" }
|
|
// CHECK: attributes #3 = { "bss-section"=".bss.2" "rodata-section"=".rodata.2" }
|