[PGO] Shorten profile symbol prefixes

[davidxl]

Summary

Unlike profile data section names, profile symbol names (for data, counter and func names) are not part of runtime ABI. They can be changed to anything (given no name conflict) without changing profile format. Current naming scheme is to prefix the owning function name with long prefixes: llvm_profile_name_, llvm_profile_counters_, __llvm_profile_data_. For large C++ programs, this scheme can add to large overhead to the size of non-stripped binary and total input object size to the linker.

This patch shortens the prefixes without losing the symbol name 'readability'.

The impact of this change: Clang profile-instr binary size is reduced by 7M, and the total instrumented object size is reduced by ~40M. For larger apps, the savings can be easily hundreds of mega byes.

The test case changes are mechanical -- they are not included in the review.

[davidxl]

Added missing subscriber.

[vsk]

This is a good idea. There are quite a few tests in llvm and clang which need updating. The clang changes can come later, but I'd expect s/llvm_profile_/prf_/g-style changes to llvm/test along with this patch.

[davidxl]

yes -- I already have the clang test changes ready and verified.

[davidxl]

Include LLVM test changes as requested.

[vsk]

Does test/tools/llvm-cov/Inputs/binary-formats.macho32b pass too? I noticed it had a __llvm_prf_names__DATA section.

[davidxl]

Every test passes. The name you mentioned is section name which is not changed (see the summary of the patch).

[vsk]

This lgtm, but please hold off on committing this until everyone's had more time to look at it.

[dnovillo]

Nice. Thanks. The shortened names are indeed easier to read (in addition to the size savings).

llvm/trunk/include/llvm/ProfileData/InstrProf.h

 
 /// Return the name of the section containing function coverage mapping
 /// data.
 inline StringRef getInstrProfCoverageSectionName(bool AddSegment) {
   return AddSegment ? "__DATA,__llvm_covmap" : "__llvm_covmap";
 }
 
 /// Return the name prefix of variables containing instrumented function names.
-inline StringRef getInstrProfNameVarPrefix() { return "__llvm_profile_name_"; }
+inline StringRef getInstrProfNameVarPrefix() { return "__prf_nm_"; }
 
 /// Return the name prefix of variables containing per-function control data.
-inline StringRef getInstrProfDataVarPrefix() { return "__llvm_profile_data_"; }
+inline StringRef getInstrProfDataVarPrefix() { return "__prf_dt_"; }
 
 /// Return the name prefix of profile counter variables.
-inline StringRef getInstrProfCountersVarPrefix() {
-  return "__llvm_profile_counters_";
-}
+inline StringRef getInstrProfCountersVarPrefix() { return "__prf_cn_"; }
 
 /// Return the name prefix of the COMDAT group for instrumentation variables
 /// associated with a COMDAT function.
 inline StringRef getInstrProfComdatPrefix() { return "__llvm_profile_vars_"; }
 
 /// Return the name of a covarage mapping variable (internal linkage)
 /// for each instrumented source module. Such variables are allocated
 /// in the __llvm_covmap section.

llvm/trunk/test/Instrumentation/InstrProfiling/PR23499.ll

 ;; Check that data associated with linkonce odr functions are placed in
 ;; the same comdat section as their associated function.
 
 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s
 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s
 
 $_Z3barIvEvv = comdat any
 
-@__llvm_profile_name__Z3barIvEvv = linkonce_odr hidden constant [11 x i8] c"_Z3barIvEvv", align 1
+@__prf_nm__Z3barIvEvv = linkonce_odr hidden constant [11 x i8] c"_Z3barIvEvv", align 1
 
-; CHECK: @__llvm_profile_name__Z3barIvEvv = linkonce_odr hidden constant [11 x i8] c"_Z3barIvEvv", section "{{.*}}__llvm_prf_names", comdat($__llvm_profile_vars__Z3barIvEvv), align 1
-; CHECK: @__llvm_profile_counters__Z3barIvEvv = linkonce_odr hidden global [1 x i64] zeroinitializer, section "{{.*}}__llvm_prf_cnts", comdat($__llvm_profile_vars__Z3barIvEvv), align 8
-; CHECK: @__llvm_profile_data__Z3barIvEvv = linkonce_odr hidden global { i32, i32, i64, i8*, i64*, i8*, i8*, [1 x i16] } { i32 11, i32 1, i64 0, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name__Z3barIvEvv, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__llvm_profile_counters__Z3barIvEvv, i32 0, i32 0), i8* null, i8* null, [1 x i16] zeroinitializer }, section "{{.*}}__llvm_prf_data", comdat($__llvm_profile_vars__Z3barIvEvv), align 8
+; CHECK: @__prf_nm__Z3barIvEvv = linkonce_odr hidden constant [11 x i8] c"_Z3barIvEvv", section "{{.*}}__llvm_prf_names", comdat($__llvm_profile_vars__Z3barIvEvv), align 1
+; CHECK: @__prf_cn__Z3barIvEvv = linkonce_odr hidden global [1 x i64] zeroinitializer, section "{{.*}}__llvm_prf_cnts", comdat($__llvm_profile_vars__Z3barIvEvv), align 8
+; CHECK: @__prf_dt__Z3barIvEvv = linkonce_odr hidden global { i32, i32, i64, i8*, i64*, i8*, i8*, [1 x i16] } { i32 11, i32 1, i64 0, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm__Z3barIvEvv, i32 0, i32 0), i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__prf_cn__Z3barIvEvv, i32 0, i32 0), i8* null, i8* null, [1 x i16] zeroinitializer }, section "{{.*}}__llvm_prf_data", comdat($__llvm_profile_vars__Z3barIvEvv), align 8
 
 declare void @llvm.instrprof.increment(i8*, i64, i32, i32) #1
 
 define linkonce_odr void @_Z3barIvEvv() comdat {
 entry:
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name__Z3barIvEvv, i32 0, i32 0), i64 0, i32 1, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm__Z3barIvEvv, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }

llvm/trunk/test/Instrumentation/InstrProfiling/linkage.ll

 ;; Check that runtime symbols get appropriate linkage.
 
 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s --check-prefix=OTHER --check-prefix=COMMON
 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s --check-prefix=LINUX --check-prefix=COMMON
 
-@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
-@__llvm_profile_name_foo_weak = weak hidden constant [8 x i8] c"foo_weak"
-@"__llvm_profile_name_linkage.ll:foo_internal" = internal constant [23 x i8] c"linkage.ll:foo_internal"
-@__llvm_profile_name_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
+@__prf_nm_foo = hidden constant [3 x i8] c"foo"
+@__prf_nm_foo_weak = weak hidden constant [8 x i8] c"foo_weak"
+@"__prf_nm_linkage.ll:foo_internal" = internal constant [23 x i8] c"linkage.ll:foo_internal"
+@__prf_nm_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
 
-; COMMON: @__llvm_profile_counters_foo = hidden global
-; COMMON: @__llvm_profile_data_foo = hidden global
+; COMMON: @__prf_cn_foo = hidden global
+; COMMON: @__prf_dt_foo = hidden global
 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)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
-; COMMON: @__llvm_profile_counters_foo_weak = weak hidden global
-; COMMON: @__llvm_profile_data_foo_weak = weak hidden global
+; COMMON: @__prf_cn_foo_weak = weak hidden global
+; COMMON: @__prf_dt_foo_weak = weak hidden global
 define weak void @foo_weak() {
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @__llvm_profile_name_foo_weak, i32 0, i32 0), i64 0, i32 1, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @__prf_nm_foo_weak, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
-; COMMON: @"__llvm_profile_counters_linkage.ll:foo_internal" = internal global
-; COMMON: @"__llvm_profile_data_linkage.ll:foo_internal" = internal global
+; COMMON: @"__prf_cn_linkage.ll:foo_internal" = internal global
+; COMMON: @"__prf_dt_linkage.ll:foo_internal" = internal global
 define internal void @foo_internal() {
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"__llvm_profile_name_linkage.ll:foo_internal", i32 0, i32 0), i64 0, i32 1, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @"__prf_nm_linkage.ll:foo_internal", i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
-; COMMON: @__llvm_profile_counters_foo_inline = linkonce_odr hidden global
-; COMMON: @__llvm_profile_data_foo_inline = linkonce_odr hidden global
+; COMMON: @__prf_cn_foo_inline = linkonce_odr hidden global
+; COMMON: @__prf_dt_foo_inline = linkonce_odr hidden global
 define linkonce_odr void @foo_inline() {
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__llvm_profile_name_foo_inline, i32 0, i32 0), i64 0, i32 1, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @__prf_nm_foo_inline, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
 
 ; OTHER: @__llvm_profile_runtime = external global i32
 ; LINUX-NOT: @__llvm_profile_runtime = external global i32
 
 ; OTHER: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
 ; OTHER:   %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
 ; OTHER:   ret i32 %[[REG]]
 ; OTHER: }
 ; LINUX-NOT: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
 ; LINUX-NOT:   %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime

llvm/trunk/test/Instrumentation/InstrProfiling/no-counters.ll

 ;; No instrumentation should be emitted if there are no counter increments.
 
 ; RUN: opt < %s -instrprof -S | FileCheck %s
-; CHECK-NOT: @__llvm_profile_counters
-; CHECK-NOT: @__llvm_profile_data
+; CHECK-NOT: @__prf_cn
+; CHECK-NOT: @__prf_dt
 ; CHECK-NOT: @__llvm_profile_runtime
 
 define void @foo() {
   ret void
 }

llvm/trunk/test/Instrumentation/InstrProfiling/noruntime.ll

 ;; Check that we don't emit the runtime hooks if the user provided them.
 
 ; RUN: opt < %s -instrprof -S | FileCheck %s
 ; CHECK-NOT: define {{.*}} @__llvm_profile_runtime_user()
 ; CHECK-NOT: load i32, i32* @__llvm_profile_runtime
 
 @__llvm_profile_runtime = global i32 0, align 4
 
-@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
+@__prf_nm_foo = hidden constant [3 x i8] c"foo"
 
 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)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)

llvm/trunk/test/Instrumentation/InstrProfiling/platform.ll

 ;; 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=LINUX
 ; RUN: opt < %s -mtriple=x86_64-unknown-freebsd -instrprof -S | FileCheck %s -check-prefix=FREEBSD
 ; RUN: opt < %s -mtriple=x86_64-pc-solaris -instrprof -S | FileCheck %s -check-prefix=SOLARIS
 
-@__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_name_foo = hidden constant [3 x i8] c"foo", section "__llvm_prf_names", align 1
-
-; MACHO: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", 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 {{.*}}, section "__DATA,__llvm_prf_data", align 8
-; LINUX: @__llvm_profile_data_foo = hidden {{.*}}, section "__llvm_prf_data", align 8
-; FREEBSD: @__llvm_profile_data_foo = hidden {{.*}}, section "__llvm_prf_data", align 8
-; SOLARIS: @__llvm_profile_data_foo = hidden {{.*}}, section "__llvm_prf_data", align 8
+@__prf_nm_foo = hidden constant [3 x i8] c"foo"
+; MACHO: @__prf_nm_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
+; ELF: @__prf_nm_foo = hidden constant [3 x i8] c"foo", section "__llvm_prf_names", align 1
+
+; MACHO: @__prf_cn_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+; ELF: @__prf_cn_foo = hidden global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", align 8
+
+; MACHO: @__prf_dt_foo = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
+; LINUX: @__prf_dt_foo = hidden {{.*}}, section "__llvm_prf_data", align 8
+; FREEBSD: @__prf_dt_foo = hidden {{.*}}, section "__llvm_prf_data", align 8
+; SOLARIS: @__prf_dt_foo = hidden {{.*}}, 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)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
 
 ;; Emit registration functions for platforms that don't find the
 ;; symbols by their sections.
 

llvm/trunk/test/Instrumentation/InstrProfiling/profiling.ll

 ; RUN: opt < %s -instrprof -S | FileCheck %s
 
 target triple = "x86_64-apple-macosx10.10.0"
 
-@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
-; CHECK: @__llvm_profile_name_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
-@__llvm_profile_name_bar = hidden constant [4 x i8] c"bar\00"
-; CHECK: @__llvm_profile_name_bar = hidden constant [4 x i8] c"bar\00", section "__DATA,__llvm_prf_names", align 1
-@__llvm_profile_name_baz = hidden constant [3 x i8] c"baz"
-; CHECK: @__llvm_profile_name_baz = hidden constant [3 x i8] c"baz", section "__DATA,__llvm_prf_names", align 1
+@__prf_nm_foo = hidden constant [3 x i8] c"foo"
+; CHECK: @__prf_nm_foo = hidden constant [3 x i8] c"foo", section "__DATA,__llvm_prf_names", align 1
+@__prf_nm_bar = hidden constant [4 x i8] c"bar\00"
+; CHECK: @__prf_nm_bar = hidden constant [4 x i8] c"bar\00", section "__DATA,__llvm_prf_names", align 1
+@__prf_nm_baz = hidden constant [3 x i8] c"baz"
+; CHECK: @__prf_nm_baz = hidden constant [3 x i8] c"baz", section "__DATA,__llvm_prf_names", align 1
 
-; CHECK: @__llvm_profile_counters_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
-; CHECK: @__llvm_profile_data_foo = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
+; CHECK: @__prf_cn_foo = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+; CHECK: @__prf_dt_foo = hidden {{.*}}, section "__DATA,__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)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
-; CHECK: @__llvm_profile_counters_bar = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
-; CHECK: @__llvm_profile_data_bar = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
+; CHECK: @__prf_cn_bar = hidden global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+; CHECK: @__prf_dt_bar = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
 define void @bar() {
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @__llvm_profile_name_bar, i32 0, i32 0), i64 0, i32 1, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @__prf_nm_bar, i32 0, i32 0), i64 0, i32 1, i32 0)
   ret void
 }
 
-; CHECK: @__llvm_profile_counters_baz = hidden global [3 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
-; CHECK: @__llvm_profile_data_baz = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
+; CHECK: @__prf_cn_baz = hidden global [3 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+; CHECK: @__prf_dt_baz = hidden {{.*}}, section "__DATA,__llvm_prf_data", align 8
 define void @baz() {
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_baz, i32 0, i32 0), i64 0, i32 3, i32 0)
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_baz, i32 0, i32 0), i64 0, i32 3, i32 1)
-  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_baz, i32 0, i32 0), i64 0, i32 3, i32 2)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_baz, i32 0, i32 0), i64 0, i32 3, i32 0)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_baz, i32 0, i32 0), i64 0, i32 3, i32 1)
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_baz, i32 0, i32 0), i64 0, i32 3, i32 2)
   ret void
 }
 
 declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
 
 ; CHECK: @__llvm_profile_runtime = external global i32
-; CHECK: @llvm.used = appending global {{.*}} @__llvm_profile_data_foo {{.*}} @__llvm_profile_data_bar {{.*}} @__llvm_profile_data_baz {{.*}} section "llvm.metadata"
+; CHECK: @llvm.used = appending global {{.*}} @__prf_dt_foo {{.*}} @__prf_dt_bar {{.*}} @__prf_dt_baz {{.*}} section "llvm.metadata"

llvm/trunk/test/Transforms/PGOProfile/branch1.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/branch1.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_br_1 = private constant [9 x i8] c"test_br_1"
+; GEN: @__prf_nm_test_br_1 = private constant [9 x i8] c"test_br_1"
 
 define i32 @test_br_1(i32 %i) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: llvm.instrprof.increment
   %cmp = icmp sgt i32 %i, 0
   br i1 %cmp, label %if.then, label %if.end
 ; USE: br i1 %cmp, label %if.then, label %if.end
 ; USE-SAME: !prof ![[BW_ENTRY:[0-9]+]]
 ; USE: ![[BW_ENTRY]] = !{!"branch_weights", i32 2, i32 1}
 
 if.then:
 ; GEN: if.then:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__llvm_profile_name_test_br_1, i32 0, i32 0), i64 25571299074, i32 2, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__prf_nm_test_br_1, i32 0, i32 0), i64 25571299074, i32 2, i32 1)
   %add = add nsw i32 %i, 2
   br label %if.end
 
 if.end:
 ; GEN: if.end:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__llvm_profile_name_test_br_1, i32 0, i32 0), i64 25571299074, i32 2, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__prf_nm_test_br_1, i32 0, i32 0), i64 25571299074, i32 2, i32 0)
   %retv = phi i32 [ %add, %if.then ], [ %i, %entry ]
   ret i32 %retv
 }

llvm/trunk/test/Transforms/PGOProfile/branch2.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/branch2.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_br_2 = private constant [9 x i8] c"test_br_2"
+; GEN: @__prf_nm_test_br_2 = private constant [9 x i8] c"test_br_2"
 
 define i32 @test_br_2(i32 %i) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: llvm.instrprof.increment
   %cmp = icmp sgt i32 %i, 0
   br i1 %cmp, label %if.then, label %if.else
 ; USE: br i1 %cmp, label %if.then, label %if.else
 ; USE-SAME: !prof ![[BW_ENTRY:[0-9]+]]
 ; USE: ![[BW_ENTRY]] = !{!"branch_weights", i32 1, i32 1}
 
 if.then:
 ; GEN: if.then:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__llvm_profile_name_test_br_2, i32 0, i32 0), i64 29667547796, i32 2, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__prf_nm_test_br_2, i32 0, i32 0), i64 29667547796, i32 2, i32 0)
   %add = add nsw i32 %i, 2
   br label %if.end
 
 if.else:
 ; GEN: if.else:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__llvm_profile_name_test_br_2, i32 0, i32 0), i64 29667547796, i32 2, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__prf_nm_test_br_2, i32 0, i32 0), i64 29667547796, i32 2, i32 1)
   %sub = sub nsw i32 %i, 2
   br label %if.end
 
 if.end:
 ; GEN: if.end:
 ; GEN-NOT: llvm.instrprof.increment
   %retv = phi i32 [ %add, %if.then ], [ %sub, %if.else ]
   ret i32 %retv
 ; GEN: ret
 }

llvm/trunk/test/Transforms/PGOProfile/criticaledge.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/criticaledge.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_criticalEdge = private constant [17 x i8] c"test_criticalEdge"
-; GEN: @__llvm_profile_name__stdin__bar = private constant [11 x i8] c"<stdin>:bar"
+; GEN: @__prf_nm_test_criticalEdge = private constant [17 x i8] c"test_criticalEdge"
+; GEN: @__prf_nm__stdin__bar = private constant [11 x i8] c"<stdin>:bar"
 
 define i32 @test_criticalEdge(i32 %i, i32 %j) {
 entry:
 ; CHECK: entry:
 ; GEN-NOT: call void @llvm.instrprof.increment
   switch i32 %i, label %sw.default [
     i32 1, label %sw.bb
     i32 2, label %sw.bb1
     i32 3, label %sw.bb2
     i32 4, label %sw.bb2
 ; CHECK:    i32 3, label %entry.sw.bb2_crit_edge
 ; CHECK:    i32 4, label %entry.sw.bb2_crit_edge1
     i32 5, label %sw.bb2
   ]
 ; USE: ]
 ; USE-SAME: !prof ![[BW_SWITCH:[0-9]+]]
 
 ; CHECK: entry.sw.bb2_crit_edge1:
-; GEN:   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 1)
+; GEN:   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 1)
 ; CHECK:   br label %sw.bb2
 
 ; CHECK: entry.sw.bb2_crit_edge:
-; GEN:   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 0)
+; GEN:   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 0)
 ; CHECK:   br label %sw.bb2
 
 sw.bb:
 ; GEN: sw.bb:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 5)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 5)
   %call = call i32 @bar(i32 2)
   br label %sw.epilog
 
 sw.bb1:
 ; GEN: sw.bb1:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 4)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 4)
   %call2 = call i32 @bar(i32 1024)
   br label %sw.epilog
 
 sw.bb2:
 ; GEN: sw.bb2:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %cmp = icmp eq i32 %j, 2
   br i1 %cmp, label %if.then, label %if.end
 ; USE: br i1 %cmp, label %if.then, label %if.end
 ; USE-SAME: !prof ![[BW_SW_BB2:[0-9]+]]
 
 if.then:
 ; GEN: if.then:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 2)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 2)
   %call4 = call i32 @bar(i32 4)
   br label %return
 
 if.end:
 ; GEN: if.end:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 3)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 3)
   %call5 = call i32 @bar(i32 8)
   br label %sw.epilog
 
 sw.default:
 ; GEN: sw.default:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %call6 = call i32 @bar(i32 32)
   %cmp7 = icmp sgt i32 %j, 10
   br i1 %cmp7, label %if.then8, label %if.end9
 ; USE: br i1 %cmp7, label %if.then8, label %if.end9
 ; USE-SAME: !prof ![[BW_SW_DEFAULT:[0-9]+]]
 
 if.then8:
 ; GEN: if.then8:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 7)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 7)
   %add = add nsw i32 %call6, 10
   br label %if.end9
 
 if.end9:
 ; GEN: if.end9:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__llvm_profile_name_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 6)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @__prf_nm_test_criticalEdge, i32 0, i32 0), i64 82323253069, i32 8, i32 6)
   %res.0 = phi i32 [ %add, %if.then8 ], [ %call6, %sw.default ]
   br label %sw.epilog
 
 sw.epilog:
 ; GEN: sw.epilog:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %res.1 = phi i32 [ %res.0, %if.end9 ], [ %call5, %if.end ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ]
   br label %return
 
 return:
 ; GEN: return:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %retval = phi i32 [ %res.1, %sw.epilog ], [ %call4, %if.then ]
   ret i32 %retval
 }
 
 define internal i32 @bar(i32 %i) {
 entry:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name__stdin__bar, i32 0, i32 0), i64 12884901887, i32 1, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm__stdin__bar, i32 0, i32 0), i64 12884901887, i32 1, i32 0)
   ret i32 %i
 }
 
 ; USE: ![[BW_SWITCH]] = !{!"branch_weights", i32 2, i32 1, i32 0, i32 2, i32 1, i32 1}
 ; USE: ![[BW_SW_BB2]] = !{!"branch_weights", i32 2, i32 2}
 ; USE: ![[BW_SW_DEFAULT]] = !{!"branch_weights", i32 1, i32 1}

llvm/trunk/test/Transforms/PGOProfile/landingpad.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/landingpad.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
 @val = global i32 0, align 4
 @_ZTIi = external constant i8*
-; GEN: @__llvm_profile_name_bar = private constant [3 x i8] c"bar"
-; GEN: @__llvm_profile_name_foo = private constant [3 x i8] c"foo"
+; GEN: @__prf_nm_bar = private constant [3 x i8] c"bar"
+; GEN: @__prf_nm_foo = private constant [3 x i8] c"foo"
 
 define i32 @bar(i32 %i) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %rem = srem i32 %i, 3
   %tobool = icmp ne i32 %rem, 0
   br i1 %tobool, label %if.then, label %if.end
 ; USE: br i1 %tobool, label %if.then, label %if.end
 ; USE-SAME: !prof ![[BW_BAR_ENTRY:[0-9]+]]
 
 if.then:
 ; GEN: if.then:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_bar, i32 0, i32 0), i64 24868915205, i32 2, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_bar, i32 0, i32 0), i64 24868915205, i32 2, i32 1)
   %exception = call i8* @__cxa_allocate_exception(i64 4)
   %tmp = bitcast i8* %exception to i32*
   store i32 %i, i32* %tmp, align 16
   call void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null)
   unreachable
 
 if.end:
 ; GEN: if.end:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_bar, i32 0, i32 0), i64 24868915205, i32 2, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_bar, i32 0, i32 0), i64 24868915205, i32 2, i32 0)
   ret i32 0
 }
 
 declare i8* @__cxa_allocate_exception(i64)
 
 declare void @__cxa_throw(i8*, i8*, i8*)
 
 define i32 @foo(i32 %i) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {

 ; GEN: if.then:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %mul = mul nsw i32 %i, 7
   %call = invoke i32 @bar(i32 %mul)
           to label %invoke.cont unwind label %lpad
 
 invoke.cont:
 ; GEN: invoke.cont:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 1)
   br label %if.end
 
 lpad:
 ; GEN: lpad:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %tmp = landingpad { i8*, i32 }
           catch i8* bitcast (i8** @_ZTIi to i8*)
   %tmp1 = extractvalue { i8*, i32 } %tmp, 0
   %tmp2 = extractvalue { i8*, i32 } %tmp, 1
   br label %catch.dispatch
 
 catch.dispatch:
 ; GEN: catch.dispatch:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %tmp3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
   %matches = icmp eq i32 %tmp2, %tmp3
   br i1 %matches, label %catch, label %eh.resume
 ; USE: br i1 %matches, label %catch, label %eh.resume
 ; USE-SAME: !prof ![[BW_CATCH_DISPATCH:[0-9]+]]
 
 catch:
 ; GEN: catch:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 2)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 2)
   %tmp4 = call i8* @__cxa_begin_catch(i8* %tmp1)
   %tmp5 = bitcast i8* %tmp4 to i32*
   %tmp6 = load i32, i32* %tmp5, align 4
   %tmp7 = load i32, i32* @val, align 4
   %sub = sub nsw i32 %tmp7, %tmp6
   store i32 %sub, i32* @val, align 4
   call void @__cxa_end_catch()
   br label %try.cont
 
 try.cont:
 ; GEN: try.cont:
 ; GEN-NOT: call void @llvm.instrprof.increment
   ret i32 -1
 
 if.end:
 ; GEN: if.end:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 0)
   %tmp8 = load i32, i32* @val, align 4
   %add = add nsw i32 %tmp8, %i
   store i32 %add, i32* @val, align 4
   br label %try.cont
 
 eh.resume:
 ; GEN: eh.resume:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 3)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__prf_nm_foo, i32 0, i32 0), i64 59130013419, i32 4, i32 3)
   %lpad.val = insertvalue { i8*, i32 } undef, i8* %tmp1, 0
   %lpad.val3 = insertvalue { i8*, i32 } %lpad.val, i32 %tmp2, 1
   resume { i8*, i32 } %lpad.val3
 }
 
 declare i32 @__gxx_personality_v0(...)
 
 declare i32 @llvm.eh.typeid.for(i8*)
 
 declare i8* @__cxa_begin_catch(i8*)
 
 declare void @__cxa_end_catch()
 
 ; USE: ![[BW_BAR_ENTRY]] = !{!"branch_weights", i32 2, i32 1}
 ; USE: ![[BW_FOO_ENTRY]] = !{!"branch_weights", i32 3, i32 2}
 ; USE: ![[BW_CATCH_DISPATCH]] = !{!"branch_weights", i32 2, i32 0}

llvm/trunk/test/Transforms/PGOProfile/loop1.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/loop1.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_simple_for = private constant [15 x i8] c"test_simple_for"
+; GEN: @__prf_nm_test_simple_for = private constant [15 x i8] c"test_simple_for"
 
 define i32 @test_simple_for(i32 %n) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: call void @llvm.instrprof.increment
   br label %for.cond
 
 for.cond:

 for.body:
 ; GEN: for.body:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %inc = add nsw i32 %sum, 1
   br label %for.inc
 
 for.inc:
 ; GEN: for.inc:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__llvm_profile_name_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__prf_nm_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 0)
   %inc1 = add nsw i32 %i, 1
   br label %for.cond
 
 for.end:
 ; GEN: for.end:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__llvm_profile_name_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__prf_nm_test_simple_for, i32 0, i32 0), i64 34137660316, i32 2, i32 1)
   ret i32 %sum
 }

llvm/trunk/test/Transforms/PGOProfile/loop2.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/loop2.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_nested_for = private constant [15 x i8] c"test_nested_for"
+; GEN: @__prf_nm_test_nested_for = private constant [15 x i8] c"test_nested_for"
 
 define i32 @test_nested_for(i32 %r, i32 %s) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: call void @llvm.instrprof.increment
   br label %for.cond.outer
 
 for.cond.outer:

 for.body.inner:
 ; GEN: for.body.inner:
 ; GEN-NOT: call void @llvm.instrprof.increment
   %inc = add nsw i32 %sum.1, 1
   br label %for.inc.inner
 
 for.inc.inner:
 ; GEN: for.inc.inner:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__llvm_profile_name_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__prf_nm_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 0)
   %inc.1 = add nsw i32 %j.0, 1
   br label %for.cond.inner
 
 for.end.inner:
 ; GEN: for.end.inner:
   br label %for.inc.outer
 
 for.inc.outer:
 ; GEN: for.inc.outer:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__llvm_profile_name_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__prf_nm_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 1)
   %inc.2 = add nsw i32 %i.0, 1
   br label %for.cond.outer
 
 for.end.outer:
 ; GEN: for.end.outer:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__llvm_profile_name_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 2)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @__prf_nm_test_nested_for, i32 0, i32 0), i64 53929068288, i32 3, i32 2)
   ret i32 %sum.0
 }
 
 ; USE-DAG: ![[BW_FOR_COND_OUTER]] = !{!"branch_weights", i32 10, i32 6}
 ; USE-DAG: ![[BW_FOR_COND_INNER]] = !{!"branch_weights", i32 33, i32 10}
 

llvm/trunk/test/Transforms/PGOProfile/single_bb.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_single_bb = private constant [9 x i8] c"single_bb"
+; GEN: @__prf_nm_single_bb = private constant [9 x i8] c"single_bb"
 
 define i32 @single_bb() {
 entry:
 ; GEN: entry:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__llvm_profile_name_single_bb, i32 0, i32 0), i64 12884901887, i32 1, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @__prf_nm_single_bb, i32 0, i32 0), i64 12884901887, i32 1, i32 0)
   ret i32 0
 }

llvm/trunk/test/Transforms/PGOProfile/switch.ll

 ; RUN: opt < %s -pgo-instr-gen -S | FileCheck %s --check-prefix=GEN
 ; RUN: llvm-profdata merge %S/Inputs/switch.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
 
-; GEN: @__llvm_profile_name_test_switch = private constant [11 x i8] c"test_switch"
+; GEN: @__prf_nm_test_switch = private constant [11 x i8] c"test_switch"
 
 define void @test_switch(i32 %i) {
 entry:
 ; GEN: entry:
 ; GEN-NOT: call void @llvm.instrprof.increment
   switch i32 %i, label %sw.default [
     i32 1, label %sw.bb
     i32 2, label %sw.bb1
     i32 3, label %sw.bb2
   ]
 ; USE: ]
 ; USE-SAME: !prof ![[BW_SWITCH:[0-9]+]]
 ; USE: ![[BW_SWITCH]] = !{!"branch_weights", i32 3, i32 2, i32 0, i32 5}
 
 sw.bb:
 ; GEN: sw.bb:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 2)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 2)
   br label %sw.epilog
 
 sw.bb1:
 ; GEN: sw.bb1:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 0)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 0)
   br label %sw.epilog
 
 sw.bb2:
 ; GEN: sw.bb2:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 1)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 1)
   br label %sw.epilog
 
 sw.default:
 ; GEN: sw.default:
-; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__llvm_profile_name_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 3)
+; GEN: call void @llvm.instrprof.increment(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @__prf_nm_test_switch, i32 0, i32 0), i64 46200943743, i32 4, i32 3)
   br label %sw.epilog
 
 sw.epilog:
 ; GEN: sw.epilog:
 ; GEN-NOT: call void @llvm.instrprof.increment
   ret void
 ; GEN: ret void
 }