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      1 ;; Check that runtime symbols get appropriate linkage.
      2 
      3 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s --check-prefix=OTHER --check-prefix=COMMON
      4 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s --check-prefix=LINUX --check-prefix=COMMON
      5 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -passes=instrprof -S | FileCheck %s --check-prefix=OTHER --check-prefix=COMMON
      6 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefix=LINUX --check-prefix=COMMON
      7 ; RUN: opt < %s  -mtriple=x86_64-pc-win32-coff -instrprof -S | FileCheck %s --check-prefix=COFF
      8 ; RUN: opt < %s  -mtriple=x86_64-pc-win32-coff -passes=instrprof -S | FileCheck %s --check-prefix=COFF
      9 
     10 @__profn_foo = hidden constant [3 x i8] c"foo"
     11 @__profn_foo_weak = weak hidden constant [8 x i8] c"foo_weak"
     12 @"__profn_linkage.ll:foo_internal" = internal constant [23 x i8] c"linkage.ll:foo_internal"
     13 @__profn_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
     14 @__profn_foo_extern = linkonce_odr hidden constant [10 x i8] c"foo_extern"
     15 
     16 ; COMMON: @__profc_foo = hidden global
     17 ; COMMON: @__profd_foo = hidden global
     18 define void @foo() {
     19   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)
     20   ret void
     21 }
     22 
     23 ; COMMON: @__profc_foo_weak = weak hidden global
     24 ; COMMON: @__profd_foo_weak = weak hidden global
     25 define weak void @foo_weak() {
     26   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @__profn_foo_weak, i32 0, i32 0), i64 0, i32 1, i32 0)
     27   ret void
     28 }
     29 
     30 ; COMMON: @"__profc_linkage.ll:foo_internal" = internal global
     31 ; COMMON: @"__profd_linkage.ll:foo_internal" = internal global
     32 define internal void @foo_internal() {
     33   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"__profn_linkage.ll:foo_internal", i32 0, i32 0), i64 0, i32 1, i32 0)
     34   ret void
     35 }
     36 
     37 ; COMMON: @__profc_foo_inline = linkonce_odr hidden global
     38 ; COMMON: @__profd_foo_inline = linkonce_odr hidden global
     39 define linkonce_odr void @foo_inline() {
     40   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   ret void
     42 }
     43 
     44 ; LINUX: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_cnts", comdat($__profv_foo_extern), align 8
     45 ; LINUX: @__profd_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_data", comdat($__profv_foo_extern), align 8
     46 ; OTHER: @__profc_foo_extern = linkonce_odr hidden global
     47 ; OTHER: @__profd_foo_extern = linkonce_odr hidden global
     48 define available_externally void @foo_extern() {
     49   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)
     50   ret void
     51 }
     52 
     53 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
     54 
     55 ; OTHER: @__llvm_profile_runtime = external global i32
     56 ; LINUX-NOT: @__llvm_profile_runtime = external global i32
     57 
     58 ; OTHER: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
     59 ; OTHER:   %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
     60 ; OTHER:   ret i32 %[[REG]]
     61 ; OTHER: }
     62 ; COFF: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} comdat {
     63 ; LINUX-NOT: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
     64 ; LINUX-NOT:   %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
     65