On Linux, the profile runtime can use __start_SECTNAME and __stop_SECTNAME
symbols defined by the linker to locate the start and end location of
a named section (with C name). This eliminates the need for instrumented
binary to call __llvm_profile_register_function during start-up time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@250199
91177308-0d34-0410-b5e6-
96231b3b80d8
if (Triple(M->getTargetTriple()).isOSDarwin())
return;
if (Triple(M->getTargetTriple()).isOSDarwin())
return;
+ // Use linker script magic to get data/cnts/name start/end.
+ if (Triple(M->getTargetTriple()).isOSLinux()) return;
+
// Construct the function.
auto *VoidTy = Type::getVoidTy(M->getContext());
auto *VoidPtrTy = Type::getInt8PtrTy(M->getContext());
// Construct the function.
auto *VoidTy = Type::getVoidTy(M->getContext());
auto *VoidPtrTy = Type::getInt8PtrTy(M->getContext());
;; Checks for platform specific section names and initialization code.
; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s -check-prefix=MACHO
;; Checks for platform specific section names and initialization code.
; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s -check-prefix=MACHO
-; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s -check-prefix=ELF
+; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s -check-prefix=LINUX
+; RUN: opt < %s -mtriple=x86_64-unknown-freebsd -instrprof -S | FileCheck %s -check-prefix=BSD
@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
; MACHO: @__llvm_profile_name_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
; MACHO: @__llvm_profile_name_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
; ELF: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", align 8
; MACHO: @__llvm_profile_data_foo = hidden constant {{.*}}, section "__DATA,__llvm_prf_data", align 8
; ELF: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", align 8
; MACHO: @__llvm_profile_data_foo = hidden constant {{.*}}, section "__DATA,__llvm_prf_data", align 8
-; ELF: @__llvm_profile_data_foo = hidden constant {{.*}}, section "__llvm_prf_data", align 8
+; LINUX: @__llvm_profile_data_foo = hidden constant {{.*}}, section "__llvm_prf_data", align 8
+; BSD: @__llvm_profile_data_foo = hidden constant {{.*}}, section "__llvm_prf_data", align 8
define void @foo() {
call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
ret void
define void @foo() {
call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
ret void
;; symbols by their sections.
; MACHO-NOT: define internal void @__llvm_profile_register_functions
;; symbols by their sections.
; MACHO-NOT: define internal void @__llvm_profile_register_functions
-; ELF: define internal void @__llvm_profile_register_functions
+; LINUX-NOT: define internal void @__llvm_profile_register_functions
+; BSD: define internal void @__llvm_profile_register_functions
; MACHO-NOT: define internal void @__llvm_profile_init
; MACHO-NOT: define internal void @__llvm_profile_init
-; ELF: define internal void @__llvm_profile_init
+; BSD: define internal void @__llvm_profile_init