| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -Werror=ignored-attributes \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-NOM |
| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -Werror=ignored-attributes -mfunction-return=keep \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-KEEP |
| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -Werror=ignored-attributes -mfunction-return=thunk-extern \ |
| // RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-EXTERN |
| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -mfunction-return=thunk-extern -coverage-data-file=/dev/null \ |
| // RUN: | FileCheck %s --check-prefix=CHECK-GCOV |
| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -mfunction-return=thunk-extern -fsanitize=address \ |
| // RUN: | FileCheck %s --check-prefix=CHECK-ASAN |
| // RUN: %clang_cc1 -std=gnu2x -triple x86_64-linux-gnu %s -emit-llvm -o - \ |
| // RUN: -mfunction-return=thunk-extern -fsanitize=thread \ |
| // RUN: | FileCheck %s --check-prefix=CHECK-TSAN |
| |
| #if !__has_attribute(function_return) |
| #error "missing attribute support for function_return" |
| #endif |
| |
| // CHECK: @keep() [[KEEP:#[0-9]+]] |
| __attribute__((function_return("keep"))) void keep(void) {} |
| |
| // CHECK: @keep2() [[KEEP]] |
| [[gnu::function_return("keep")]] void keep2(void) {} |
| |
| // CHECK: @thunk_extern() [[EXTERN:#[0-9]+]] |
| __attribute__((function_return("thunk-extern"))) void thunk_extern(void) {} |
| |
| // CHECK: @thunk_extern2() [[EXTERN]] |
| [[gnu::function_return("thunk-extern")]] void thunk_extern2(void) {} |
| |
| // CHECK: @double_thunk_keep() [[KEEP]] |
| // clang-format off |
| __attribute__((function_return("thunk-extern"))) |
| __attribute__((function_return("keep"))) |
| void double_thunk_keep(void) {} |
| |
| // CHECK: @double_thunk_keep2() [[KEEP]] |
| [[gnu::function_return("thunk-extern")]][[gnu::function_return("keep")]] |
| void double_thunk_keep2(void) {} |
| |
| // CHECK: @double_keep_thunk() [[EXTERN]] |
| __attribute__((function_return("keep"))) |
| __attribute__((function_return("thunk-extern"))) |
| void double_keep_thunk(void) {} |
| |
| // CHECK: @double_keep_thunk2() [[EXTERN]] |
| [[gnu::function_return("keep")]][[gnu::function_return("thunk-extern")]] |
| void double_keep_thunk2(void) {} |
| |
| // CHECK: @thunk_keep() [[KEEP]] |
| __attribute__((function_return("thunk-extern"), function_return("keep"))) |
| void thunk_keep(void) {} |
| |
| // CHECK: @thunk_keep2() [[KEEP]] |
| [[gnu::function_return("thunk-extern"), gnu::function_return("keep")]] |
| void thunk_keep2(void) {} |
| |
| // CHECK: @keep_thunk() [[EXTERN]] |
| __attribute__((function_return("keep"), function_return("thunk-extern"))) |
| void keep_thunk(void) {} |
| |
| // CHECK: @keep_thunk2() [[EXTERN]] |
| [[gnu::function_return("keep"), gnu::function_return("thunk-extern")]] |
| void keep_thunk2(void) {} |
| // clang-format on |
| |
| void undef(void); |
| // CHECK: @undef() [[KEEP]] |
| __attribute__((function_return("keep"))) void undef(void) {} |
| |
| void undef2(void); |
| // CHECK: @undef2() [[EXTERN]] |
| __attribute__((function_return("thunk-extern"))) void undef2(void) {} |
| |
| __attribute__((function_return("thunk-extern"))) void change_def(void); |
| // CHECK: @change_def() [[KEEP]] |
| __attribute__((function_return("keep"))) void change_def(void) {} |
| |
| __attribute__((function_return("keep"))) void change_def2(void); |
| // CHECK: @change_def2() [[EXTERN]] |
| __attribute__((function_return("thunk-extern"))) void change_def2(void) {} |
| |
| __attribute__((function_return("thunk-extern"))) void change_def3(void); |
| // CHECK: @change_def3() [[KEEP]] |
| [[gnu::function_return("keep")]] void change_def3(void) {} |
| |
| [[gnu::function_return("keep")]] void change_def4(void); |
| // CHECK: @change_def4() [[EXTERN]] |
| __attribute__((function_return("thunk-extern"))) void change_def4(void) {} |
| |
| // When there is no -mfunction-return= flag set (NOM) or it's set to keep, |
| // we don't emit anything into the IR for unattributed functions. |
| |
| // CHECK-NOM: @no_attrs() [[NOATTR:#[0-9]+]] |
| // CHECK-KEEP: @no_attrs() [[NOATTR:#[0-9]+]] |
| // CHECK-EXTERN: @no_attrs() [[EXTERN]] |
| void no_attrs(void) {} |
| |
| // Test synthetic functions. |
| // CHECK-GCOV: @__llvm_gcov_writeout() unnamed_addr [[EXTERNGCOV:#[0-9]+]] |
| // CHECK-GCOV: @__llvm_gcov_reset() unnamed_addr [[EXTERNGCOV]] |
| // CHECK-GCOV: @__llvm_gcov_init() unnamed_addr [[EXTERNGCOV]] |
| // CHECK-ASAN: @asan.module_ctor() [[EXTERNASAN:#[0-9]+]] |
| // CHECK-TSAN: @tsan.module_ctor() [[EXTERNTSAN:#[0-9]+]] |
| |
| // CHECK-NOM-NOT: [[NOATTR]] = {{.*}}fn_ret_thunk_extern |
| // CHECK-KEEP-NOT: [[NOATTR]] = {{.*}}fn_ret_thunk_extern |
| // CHECK: [[EXTERN]] = {{.*}}fn_ret_thunk_extern |
| // CHECK-GCOV: [[EXTERNGCOV]] = {{.*}}fn_ret_thunk_extern |
| // CHECK-ASAN: [[EXTERNASAN]] = {{.*}}fn_ret_thunk_extern |
| // CHECK-TSAN: [[EXTERNTSAN]] = {{.*}}fn_ret_thunk_extern |
