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6b7b1199a8
__start_/__stop_ references retain C identifier name sections such as __llvm_prf_*. Putting these into a section group disables this logic. The ELF section group semantics ensures that group members are retained or discarded as a unit. When a function symbol is discarded, this allows allows linker to discard counters, data and values associated with that function symbol as well. Note that `noduplicates` COMDAT is lowered to zero-flag section group in ELF. We only set this for functions that aren't already in a COMDAT and for those that don't have available_externally linkage since we already use regular COMDAT groups for those. Differential Revision: https://reviews.llvm.org/D96757
58 lines
3.4 KiB
LLVM
58 lines
3.4 KiB
LLVM
;; Checks for platform specific section names and initialization code.
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; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s -check-prefix=MACHO
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; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -passes=instrprof -S | FileCheck %s -check-prefix=MACHO
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s -check-prefixes=LINUX,ELF
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; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s -check-prefixes=LINUX,ELF
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; RUN: opt < %s -mtriple=x86_64-unknown-freebsd -instrprof -S | FileCheck %s -check-prefixes=FREEBSD,ELF
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; RUN: opt < %s -mtriple=x86_64-unknown-freebsd -passes=instrprof -S | FileCheck %s -check-prefixes=FREEBSD,ELF
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; RUN: opt < %s -mtriple=x86_64-scei-ps4 -instrprof -S | FileCheck %s -check-prefixes=PS4,ELF
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; RUN: opt < %s -mtriple=x86_64-scei-ps4 -passes=instrprof -S | FileCheck %s -check-prefixes=PS4,ELF
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; RUN: opt < %s -mtriple=x86_64-pc-solaris -instrprof -S | FileCheck %s -check-prefixes=SOLARIS,ELF
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; RUN: opt < %s -mtriple=x86_64-pc-solaris -passes=instrprof -S | FileCheck %s -check-prefixes=SOLARIS,ELF
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; RUN: opt < %s -mtriple=x86_64-pc-windows -instrprof -S | FileCheck %s -check-prefix=WINDOWS
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; RUN: opt < %s -mtriple=x86_64-pc-windows -passes=instrprof -S | FileCheck %s -check-prefix=WINDOWS
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@__profn_foo = hidden constant [3 x i8] c"foo"
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; MACHO-NOT: __profn_foo
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; ELF-NOT: __profn_foo
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; WINDOWS-NOT: __profn_foo
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; MACHO: @__profc_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
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; ELF: @__profc_foo = hidden global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", comdat($__profd_foo), align 8
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; WINDOWS: @__profc_foo = internal global [1 x i64] zeroinitializer, section ".lprfc$M", align 8
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; MACHO: @__profd_foo = hidden {{.*}}, section "__DATA,__llvm_prf_data,regular,live_support", align 8
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; ELF: @__profd_foo = hidden {{.*}}, section "__llvm_prf_data", comdat, align 8
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; WINDOWS: @__profd_foo = internal global {{.*}}, section ".lprfd$M", align 8
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; ELF: @__llvm_prf_nm = private constant [{{.*}} x i8] c"{{.*}}", section "{{.*}}__llvm_prf_names", align 1
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; WINDOWS: @__llvm_prf_nm = private constant [{{.*}} x i8] c"{{.*}}", section "{{.*}}lprfn$M", align 1
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define void @foo() {
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call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__profn_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
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ret void
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}
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declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
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;; Emit registration functions for platforms that don't find the
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;; symbols by their sections.
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; MACHO-NOT: define internal void @__llvm_profile_register_functions
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; LINUX-NOT: define internal void @__llvm_profile_register_functions
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; FREEBSD-NOT: define internal void @__llvm_profile_register_functions
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; SOLARIS-NOT: define internal void @__llvm_profile_register_functions
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; PS4-NOT: define internal void @__llvm_profile_register_functions
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; WINDOWS-NOT: define internal void @__llvm_profile_register_functions
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;; PR38340: When dynamic registration is used, we had a bug where we'd register
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;; something that's not a __profd_* variable.
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; MACHO-NOT: define internal void @__llvm_profile_init
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; LINUX-NOT: define internal void @__llvm_profile_init
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; FREEBSD-NOT: define internal void @__llvm_profile_init
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; SOLARIS-NOT: define internal void @__llvm_profile_init
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; PS4-NOT: define internal void @__llvm_profile_init
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; WINDOWS-NOT: define internal void @__llvm_profile_init
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