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llvm-project/clang/test/CodeGen/dllexport-1.c

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Ensure that const variables declared at namespace scope correctly have external linkage when marked as dllexport and targeting the MSVC ABI. Patch thanks to Zahira Ammarguellat. llvm-svn: 356458
2019-03-19 22:53:52 +08:00
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm -fms-extensions -Wno-ignored-attributes -Wno-extern-initializer -o - %s | FileCheck %s -check-prefix CHECK-LNX
// RUN: %clang_cc1 -triple x86_64-pc-windows-msvc -emit-llvm -fms-extensions -o - -DMSVC %s | FileCheck %s -check-prefix CHECK-MSVC
// Export const variable.
// CHECK-MSVC: @x = dso_local dllexport constant i32 3, align 4
[test] Add {{.*}} to make ELF tests immune to dso_local/dso_preemptable/(none) differences 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 `{{.*}} `.
2020-12-31 16:27:11 +08:00
// CHECK-LNX: @x ={{.*}} constant i32 3, align 4
Ensure that const variables declared at namespace scope correctly have external linkage when marked as dllexport and targeting the MSVC ABI. Patch thanks to Zahira Ammarguellat. llvm-svn: 356458
2019-03-19 22:53:52 +08:00
// CHECK-MSVC: @z = dso_local constant i32 4, align 4
[test] Add {{.*}} to make ELF tests immune to dso_local/dso_preemptable/(none) differences 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 `{{.*}} `.
2020-12-31 16:27:11 +08:00
// CHECK-LNX: @z ={{.*}} constant i32 4, align 4
Ensure that const variables declared at namespace scope correctly have external linkage when marked as dllexport and targeting the MSVC ABI. Patch thanks to Zahira Ammarguellat. llvm-svn: 356458
2019-03-19 22:53:52 +08:00
Recommit #2 "[Driver] Default to -fno-common for all targets" After a first attempt to fix the test-suite failures, my first recommit caused the same failures again. I had updated CMakeList.txt files of tests that needed -fcommon, but it turns out that there are also Makefiles which are used by some bots, so I've updated these Makefiles now too. See the original commit message for more details on this change: 0a9fc9233e172601e26381810d093e02ef410f65
2020-03-10 03:25:24 +08:00
// CHECK-MSVC: @y = dso_local dllexport constant i32 0, align 4
[test] Add {{.*}} to make ELF tests immune to dso_local/dso_preemptable/(none) differences 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 `{{.*}} `.
2020-12-31 16:27:11 +08:00
// CHECK-LNX: @y ={{.*}} constant i32 0, align 4
Ensure that const variables declared at namespace scope correctly have external linkage when marked as dllexport and targeting the MSVC ABI. Patch thanks to Zahira Ammarguellat. llvm-svn: 356458
2019-03-19 22:53:52 +08:00
__declspec(dllexport) int const x = 3;
__declspec(dllexport) const int y;
// expected-warning@+1 {{'extern' variable has an initializer}}
extern int const z = 4;
Use functions with prototypes when appropriate; NFC A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the eleventh batch of tests being updated (there are a significant number of other tests left to be updated).
2022-02-16 05:06:01 +08:00
int main(void) {
Ensure that const variables declared at namespace scope correctly have external linkage when marked as dllexport and targeting the MSVC ABI. Patch thanks to Zahira Ammarguellat. llvm-svn: 356458
2019-03-19 22:53:52 +08:00
int a = x + y + z;
return a;
}