Index: llvm/trunk/include/llvm/ProfileData/InstrProf.h
===================================================================
--- llvm/trunk/include/llvm/ProfileData/InstrProf.h
+++ llvm/trunk/include/llvm/ProfileData/InstrProf.h
@@ -70,15 +70,13 @@
 }
 
 /// 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.
Index: llvm/trunk/test/Instrumentation/InstrProfiling/PR23499.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/PR23499.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/PR23499.ll
@@ -6,16 +6,16 @@
 
 $_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
 }
Index: llvm/trunk/test/Instrumentation/InstrProfiling/linkage.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/linkage.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/linkage.ll
@@ -3,36 +3,36 @@
 ; 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
 }
 
Index: llvm/trunk/test/Instrumentation/InstrProfiling/no-counters.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/no-counters.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/no-counters.ll
@@ -1,8 +1,8 @@
 ;; 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() {
Index: llvm/trunk/test/Instrumentation/InstrProfiling/noruntime.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/noruntime.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/noruntime.ll
@@ -6,10 +6,10 @@
 
 @__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
 }
 
Index: llvm/trunk/test/Instrumentation/InstrProfiling/platform.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/platform.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/platform.ll
@@ -5,20 +5,20 @@
 ; 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
 }
 
Index: llvm/trunk/test/Instrumentation/InstrProfiling/profiling.ll
===================================================================
--- llvm/trunk/test/Instrumentation/InstrProfiling/profiling.ll
+++ llvm/trunk/test/Instrumentation/InstrProfiling/profiling.ll
@@ -2,37 +2,37 @@
 
 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"
Index: llvm/trunk/test/Transforms/PGOProfile/branch1.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/branch1.ll
+++ llvm/trunk/test/Transforms/PGOProfile/branch1.ll
@@ -4,7 +4,7 @@
 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:
@@ -18,13 +18,13 @@
 
 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
 }
Index: llvm/trunk/test/Transforms/PGOProfile/branch2.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/branch2.ll
+++ llvm/trunk/test/Transforms/PGOProfile/branch2.ll
@@ -4,7 +4,7 @@
 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:
@@ -18,13 +18,13 @@
 
 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
 
Index: llvm/trunk/test/Transforms/PGOProfile/criticaledge.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/criticaledge.ll
+++ llvm/trunk/test/Transforms/PGOProfile/criticaledge.ll
@@ -4,8 +4,8 @@
 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:
@@ -24,22 +24,22 @@
 ; 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
 
@@ -53,13 +53,13 @@
 
 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
 
@@ -74,13 +74,13 @@
 
 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
 
@@ -99,7 +99,7 @@
 
 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
 }
 
Index: llvm/trunk/test/Transforms/PGOProfile/landingpad.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/landingpad.ll
+++ llvm/trunk/test/Transforms/PGOProfile/landingpad.ll
@@ -6,8 +6,8 @@
 
 @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:
@@ -21,7 +21,7 @@
 
 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
@@ -30,7 +30,7 @@
 
 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
 }
 
@@ -57,7 +57,7 @@
 
 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:
@@ -80,7 +80,7 @@
 
 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
@@ -97,7 +97,7 @@
 
 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
@@ -105,7 +105,7 @@
 
 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
Index: llvm/trunk/test/Transforms/PGOProfile/loop1.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/loop1.ll
+++ llvm/trunk/test/Transforms/PGOProfile/loop1.ll
@@ -4,7 +4,7 @@
 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:
@@ -31,12 +31,12 @@
 
 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
 }
Index: llvm/trunk/test/Transforms/PGOProfile/loop2.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/loop2.ll
+++ llvm/trunk/test/Transforms/PGOProfile/loop2.ll
@@ -4,7 +4,7 @@
 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:
@@ -45,7 +45,7 @@
 
 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
 
@@ -55,13 +55,13 @@
 
 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
 }
 
Index: llvm/trunk/test/Transforms/PGOProfile/single_bb.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/single_bb.ll
+++ llvm/trunk/test/Transforms/PGOProfile/single_bb.ll
@@ -2,11 +2,11 @@
 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
 }
Index: llvm/trunk/test/Transforms/PGOProfile/switch.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/switch.ll
+++ llvm/trunk/test/Transforms/PGOProfile/switch.ll
@@ -4,7 +4,7 @@
 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:
@@ -21,22 +21,22 @@
 
 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: