1 ; There are two main cases where comdats are necessary:
2 ; 1. standard inline functions (weak_odr / linkonce_odr)
3 ; 2. available externally functions (C99 inline / extern template / dllimport)
4 ; Check that we do the right thing for the two object formats with comdats, ELF
7 ; Test comdat functions. Non-comdat functions are tested in linkage.ll.
8 ; RUN: split-file %s %t
9 ; RUN: cat %t/main.ll %t/disable.ll > %t0.ll
10 ; RUN: cat %t/main.ll %t/enable.ll > %t1.ll
11 ; RUN: opt < %t0.ll -mtriple=x86_64-linux -passes=instrprof -S | FileCheck %s --check-prefixes=ELF
12 ; RUN: opt < %t1.ll -mtriple=x86_64-linux -passes=instrprof -S | FileCheck %s --check-prefixes=ELF
13 ; RUN: opt < %t0.ll -mtriple=x86_64-windows -passes=instrprof -S | FileCheck %s --check-prefixes=COFF
14 ; RUN: opt < %t1.ll -mtriple=x86_64-windows -passes=instrprof -S | FileCheck %s --check-prefixes=COFF
17 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
19 $foo_inline = comdat any
20 $foo_extern = comdat any
22 @__profn_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
23 @__profn_foo_extern = linkonce_odr hidden constant [10 x i8] c"foo_extern"
25 ;; When value profiling is disabled, __profd_ variables are not referenced by
26 ;; code. We can use private linkage. When enabled, __profd_ needs to be
27 ;; non-local which requires separate comdat on COFF due to a link.exe limitation.
29 ; ELF: @__profc_foo_inline = linkonce_odr hidden global {{.*}}, section "__llvm_prf_cnts", comdat, align 8
30 ; ELF0: @__profd_foo_inline = private global {{.*}}, section "__llvm_prf_data", comdat($__profc_foo_inline), align 8
31 ; ELF1: @__profd_foo_inline = linkonce_odr hidden global {{.*}}, section "__llvm_prf_data", comdat($__profc_foo_inline), align 8
32 ; COFF0: @__profc_foo_inline = linkonce_odr hidden global {{.*}}, section ".lprfc$M", comdat, align 8
33 ; COFF0: @__profd_foo_inline = private global {{.*}}, section ".lprfd$M", comdat($__profc_foo_inline), align 8
34 ; COFF1: @__profc_foo_inline = linkonce_odr hidden global {{.*}}, section ".lprfc$M", comdat, align 8
35 ; COFF1: @__profd_foo_inline = linkonce_odr hidden global {{.*}}, section ".lprfd$M", comdat, align 8
36 define weak_odr void @foo_inline() comdat {
37 call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__profn_foo_inline, i32 0, i32 0), i64 0, i32 1, i32 0)
41 ; ELF: @__profc_foo_extern = linkonce_odr hidden global{{.*}}, section "__llvm_prf_cnts", comdat, align 8
42 ; ELF0: @__profd_foo_extern = private global{{.*}}, section "__llvm_prf_data", comdat($__profc_foo_extern), align 8
43 ; ELF1: @__profd_foo_extern = linkonce_odr hidden global{{.*}}, section "__llvm_prf_data", comdat($__profc_foo_extern), align 8
44 ; COFF: @__profc_foo_extern = linkonce_odr hidden global{{.*}}, section ".lprfc$M", comdat, align 8
45 ; COFF0: @__profd_foo_extern = private global{{.*}}, section ".lprfd$M", comdat($__profc_foo_extern), align 8
46 ; COFF1: @__profd_foo_extern = linkonce_odr hidden global{{.*}}, section ".lprfd$M", comdat, align 8
47 define available_externally void @foo_extern() {
48 call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__profn_foo_extern, i32 0, i32 0), i64 0, i32 1, i32 0)
52 ; ELF: @llvm.compiler.used = appending global {{.*}} @__profd_foo_inline {{.*}} @__profd_foo_extern
53 ; COFF0: @llvm.compiler.used = appending global {{.*}} @__llvm_profile_runtime_user {{.*}} @__profd_foo_inline {{.*}} @__profd_foo_extern
54 ; COFF1: @llvm.used = appending global {{.*}} @__llvm_profile_runtime_user {{.*}} @__profd_foo_inline {{.*}} @__profd_foo_extern
57 !llvm.module.flags = !{!0}
58 !0 = !{i32 2, !"EnableValueProfiling", i32 0}
61 !llvm.module.flags = !{!0}
62 !0 = !{i32 2, !"EnableValueProfiling", i32 1}