[compiler-rt] 97ba5cd - [InstrProfiling] Use !associated metadata for counters, data and values
Petr Hosek via llvm-commits
llvm-commits at lists.llvm.org
Tue Feb 2 23:20:08 PST 2021
Author: Petr Hosek
Date: 2021-02-02T23:19:51-08:00
New Revision: 97ba5cde52664200819446c1a18de28faf2ed1c6
URL: https://github.com/llvm/llvm-project/commit/97ba5cde52664200819446c1a18de28faf2ed1c6
DIFF: https://github.com/llvm/llvm-project/commit/97ba5cde52664200819446c1a18de28faf2ed1c6.diff
LOG: [InstrProfiling] Use !associated metadata for counters, data and values
C identifier name input sections such as __llvm_prf_* are GC roots so
they cannot be discarded. In LLD, the SHF_LINK_ORDER flag overrides the
C identifier name semantics.
The !associated metadata may be attached to a global object declaration
with a single argument that references another global object, and it
gets lowered to SHF_LINK_ORDER flag. When a function symbol is discarded
by the linker, setting up !associated metadata allows linker to discard
counters, data and values associated with that function symbol.
Note that !associated metadata is only supported by ELF, it does not have
any effect on non-ELF targets.
Differential Revision: https://reviews.llvm.org/D76802
Added:
compiler-rt/test/profile/instrprof-gc-sections.c
llvm/test/Transforms/PGOProfile/associated.ll
Modified:
clang/lib/CodeGen/BackendUtil.cpp
compiler-rt/test/CMakeLists.txt
compiler-rt/test/profile/CMakeLists.txt
llvm/include/llvm/Transforms/Instrumentation.h
llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
llvm/test/Instrumentation/InstrProfiling/icall.ll
llvm/test/Instrumentation/InstrProfiling/linkage.ll
llvm/test/Transforms/PGOProfile/counter_promo.ll
llvm/test/Transforms/PGOProfile/counter_promo_mexits.ll
Removed:
################################################################################
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 52bcd971dc8c9..f995c47024197 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -615,6 +615,9 @@ getInstrProfOptions(const CodeGenOptions &CodeGenOpts,
Options.NoRedZone = CodeGenOpts.DisableRedZone;
Options.InstrProfileOutput = CodeGenOpts.InstrProfileOutput;
Options.Atomic = CodeGenOpts.AtomicProfileUpdate;
+ std::pair<int, int> BinutilsVersion =
+ llvm::TargetMachine::parseBinutilsVersion(CodeGenOpts.BinutilsVersion);
+ Options.CounterLinkOrder = BinutilsVersion >= std::make_pair(2, 36);
return Options;
}
diff --git a/compiler-rt/test/CMakeLists.txt b/compiler-rt/test/CMakeLists.txt
index 0836005e10dbb..4d2a6ec2be103 100644
--- a/compiler-rt/test/CMakeLists.txt
+++ b/compiler-rt/test/CMakeLists.txt
@@ -22,7 +22,7 @@ if(NOT ANDROID)
# Use LLVM utils and Clang from the same build tree.
list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS
clang clang-resource-headers FileCheck count not llvm-config llvm-nm llvm-objdump
- llvm-readobj llvm-symbolizer compiler-rt-headers sancov)
+ llvm-readelf llvm-readobj llvm-symbolizer compiler-rt-headers sancov)
if (WIN32)
list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS KillTheDoctor)
endif()
diff --git a/compiler-rt/test/profile/CMakeLists.txt b/compiler-rt/test/profile/CMakeLists.txt
index 4b031306594f8..446e850a3bc11 100644
--- a/compiler-rt/test/profile/CMakeLists.txt
+++ b/compiler-rt/test/profile/CMakeLists.txt
@@ -5,6 +5,9 @@ set(PROFILE_TESTSUITES)
set(PROFILE_TEST_DEPS ${SANITIZER_COMMON_LIT_TEST_DEPS})
if(NOT COMPILER_RT_STANDALONE_BUILD)
list(APPEND PROFILE_TEST_DEPS profile llvm-profdata llvm-cov)
+ if(NOT APPLE AND COMPILER_RT_HAS_LLD AND TARGET lld)
+ list(APPEND PROFILE_TEST_DEPS lld)
+ endif()
endif()
set(PROFILE_TEST_ARCH ${PROFILE_SUPPORTED_ARCH})
diff --git a/compiler-rt/test/profile/instrprof-gc-sections.c b/compiler-rt/test/profile/instrprof-gc-sections.c
new file mode 100644
index 0000000000000..2876be1cf01a2
--- /dev/null
+++ b/compiler-rt/test/profile/instrprof-gc-sections.c
@@ -0,0 +1,91 @@
+// REQUIRES: linux, lld-available
+
+// RUN: %clang_profgen=%t.profraw -fuse-ld=lld -fcoverage-mapping -mllvm -counter-link-order -mllvm -enable-name-compression=false -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -o %t %s
+// RUN: %run %t
+// RUN: llvm-profdata merge -o %t.profdata %t.profraw
+// RUN: llvm-profdata show --all-functions %t.profdata | FileCheck %s -check-prefix=PROF
+// RUN: llvm-cov show %t -instr-profile %t.profdata | FileCheck %s -check-prefix=COV
+// RUN: llvm-nm %t | FileCheck %s -check-prefix=NM
+// RUN: llvm-readelf -x __llvm_prf_names %t | FileCheck %s -check-prefix=PRF_NAMES
+// RUN: llvm-readelf -x __llvm_prf_cnts %t | FileCheck %s -check-prefix=PRF_CNTS
+
+// RUN: %clang_lto_profgen=%t.lto.profraw -fuse-ld=lld -fcoverage-mapping -mllvm -counter-link-order -mllvm -enable-name-compression=false -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -flto -o %t.lto %s
+// RUN: %run %t.lto
+// RUN: llvm-profdata merge -o %t.lto.profdata %t.lto.profraw
+// RUN: llvm-profdata show --all-functions %t.lto.profdata | FileCheck %s -check-prefix=PROF
+// RUN: llvm-cov show %t.lto -instr-profile %t.lto.profdata | FileCheck %s -check-prefix=COV
+// RUN: llvm-nm %t.lto | FileCheck %s -check-prefix=NM
+// RUN: llvm-readelf -x __llvm_prf_names %t.lto | FileCheck %s -check-prefix=PRF_NAMES
+// RUN: llvm-readelf -x __llvm_prf_cnts %t.lto | FileCheck %s -check-prefix=PRF_CNTS
+
+// Note: We expect foo() and some of the profiling data associated with it to
+// be garbage collected.
+
+// Note: When there is no code in a program, we expect to see the exact same
+// set of external functions provided by the profile runtime.
+
+// RUN: %clang_profgen -fuse-ld=lld -fcoverage-mapping -mllvm -counter-link-order -ffunction-sections -fdata-sections -Wl,--gc-sections -shared -o %t.nocode.so %s
+// RUN: llvm-nm -jgU %t.nocode.so | grep -vE "__prof_orderfile_sect_data|__start_.*|__stop_.*" > %t.nocode.syms
+// RUN: llvm-nm -jgU %t | grep -vE "main|_start|_IO_stdin_used|__libc_.*" > %t.code.syms
+// RUN:
diff %t.nocode.syms %t.code.syms
+
+// Note: We also check the IR instrumentation and expect foo() to be garbage
+// collected as well.
+
+// RUN: %clang_pgogen=%t.pgo.profraw -fuse-ld=lld -mllvm -counter-link-order -DCODE=1 -ffunction-sections -fdata-sections -Wl,--gc-sections -o %t.pgo %s
+// RUN: %run %t.pgo
+// RUN: llvm-profdata merge -o %t.pgo.profdata %t.pgo.profraw
+// RUN: llvm-profdata show --all-functions %t.pgo.profdata | FileCheck %s -check-prefix=PGO
+// RUN: llvm-nm %t.pgo | FileCheck %s -check-prefix=NM
+
+#ifdef CODE
+
+// COV: [[@LINE+1]]{{ *}}|{{ *}}0|void foo()
+void foo() {}
+
+// COV: [[@LINE+1]]{{ *}}|{{ *}}1|int main
+int main() { return 0; }
+
+#endif // CODE
+
+// NM-NOT: foo
+
+// PROF: Counters:
+// PROF-NEXT: main:
+// PROF-NEXT: Hash:
+// PROF-NEXT: Counters: 1
+// PROF-NEXT: Function count: 1
+// PROF-NEXT: Instrumentation level: Front-end
+// PROF-NEXT: Functions shown: 1
+// PROF-NEXT: Total functions: 1
+// PROF-NEXT: Maximum function count:
+// PROF-NEXT: Maximum internal block count:
+
+// Note: We don't expect the names of garbage collected functions to disappear
+// from __llvm_prf_names, because collectPGOFuncNameStrings() glues the names
+// together.
+
+// PRF_NAMES: Hex dump of section '__llvm_prf_names':
+// PRF_NAMES-NEXT: {{.*}} 0800666f 6f016d61 696e{{.*$}}
+// | | f o o # m a i n
+// | |___________|
+// | |
+// UncompressedLen = 8 |
+// |
+// CompressedLen = 0
+
+// Note: We expect the profile counters for garbage collected functions to also
+// be garbage collected.
+
+// PRF_CNTS: Hex dump of section '__llvm_prf_cnts':
+// PRF_CNTS-NEXT: {{.*}} 00000000 00000000 {{.*$}}
+
+// PGO: Counters:
+// PGO-NEXT: main:
+// PGO-NEXT: Hash:
+// PGO-NEXT: Counters: 1
+// PGO-NEXT: Instrumentation level: IR
+// PGO-NEXT: Functions shown: 1
+// PGO-NEXT: Total functions: 1
+// PGO-NEXT: Maximum function count:
+// PGO-NEXT: Maximum internal block count:
diff --git a/llvm/include/llvm/Transforms/Instrumentation.h b/llvm/include/llvm/Transforms/Instrumentation.h
index c960d5b0ab501..ef6f6674af4ec 100644
--- a/llvm/include/llvm/Transforms/Instrumentation.h
+++ b/llvm/include/llvm/Transforms/Instrumentation.h
@@ -132,6 +132,9 @@ struct InstrProfOptions {
// Use BFI to guide register promotion
bool UseBFIInPromotion = false;
+ // Use !associated metadata to enable linker GC
+ bool CounterLinkOrder = false;
+
// Name of the profile file to use as output
std::string InstrProfileOutput;
diff --git a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
index 5ce72cd59ac2e..f0ab0a32484aa 100644
--- a/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
+++ b/llvm/include/llvm/Transforms/Instrumentation/InstrProfiling.h
@@ -83,6 +83,9 @@ class InstrProfiling : public PassInfoMixin<InstrProfiling> {
/// Returns true if profile counter update register promotion is enabled.
bool isCounterPromotionEnabled() const;
+ /// Returns true if the use of !associated metadata is enabled.
+ bool isCounterLinkOrderEnabled() const;
+
/// Count the number of instrumented value sites for the function.
void computeNumValueSiteCounts(InstrProfValueProfileInst *Ins);
diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index 9efc7d1ac500a..be2693bc35017 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -69,6 +69,11 @@ cl::opt<bool> RuntimeCounterRelocation(
cl::desc("Enable relocating counters at runtime."),
cl::init(false));
+cl::opt<bool> CounterLinkOrder(
+ "counter-link-order",
+ cl::desc("Set counter associated metadata to enable garbage collection at link time."),
+ cl::init(false));
+
cl::opt<bool> ValueProfileStaticAlloc(
"vp-static-alloc",
cl::desc("Do static counter allocation for value profiler"),
@@ -479,6 +484,13 @@ bool InstrProfiling::isCounterPromotionEnabled() const {
return Options.DoCounterPromotion;
}
+bool InstrProfiling::isCounterLinkOrderEnabled() const {
+ if (CounterLinkOrder.getNumOccurrences() > 0)
+ return CounterLinkOrder;
+
+ return Options.CounterLinkOrder;
+}
+
void InstrProfiling::promoteCounterLoadStores(Function *F) {
if (!isCounterPromotionEnabled())
return;
@@ -850,6 +862,12 @@ InstrProfiling::getOrCreateRegionCounters(InstrProfIncrementInst *Inc) {
CounterPtr->setAlignment(Align(8));
MaybeSetComdat(CounterPtr);
CounterPtr->setLinkage(Linkage);
+ // We need a self-link for the counter variable because the ELF section name
+ // (that is __llvm_prf_cnts) is a C identifier and considered a GC root in the
+ // absence of the SHF_LINK_ORDER flag.
+ if (isCounterLinkOrderEnabled())
+ CounterPtr->setMetadata(LLVMContext::MD_associated,
+ MDNode::get(Ctx, ValueAsMetadata::get(Fn)));
auto *Int8PtrTy = Type::getInt8PtrTy(Ctx);
// Allocate statically the array of pointers to value profile nodes for
@@ -871,6 +889,10 @@ InstrProfiling::getOrCreateRegionCounters(InstrProfIncrementInst *Inc) {
getInstrProfSectionName(IPSK_vals, TT.getObjectFormat()));
ValuesVar->setAlignment(Align(8));
MaybeSetComdat(ValuesVar);
+ if (isCounterLinkOrderEnabled())
+ ValuesVar->setMetadata(
+ LLVMContext::MD_associated,
+ MDNode::get(Ctx, ValueAsMetadata::get(CounterPtr)));
ValuesPtrExpr =
ConstantExpr::getBitCast(ValuesVar, Type::getInt8PtrTy(Ctx));
}
@@ -905,6 +927,9 @@ InstrProfiling::getOrCreateRegionCounters(InstrProfIncrementInst *Inc) {
Data->setAlignment(Align(INSTR_PROF_DATA_ALIGNMENT));
MaybeSetComdat(Data);
Data->setLinkage(Linkage);
+ if (isCounterLinkOrderEnabled())
+ Data->setMetadata(LLVMContext::MD_associated,
+ MDNode::get(Ctx, ValueAsMetadata::get(CounterPtr)));
PD.RegionCounters = CounterPtr;
PD.DataVar = Data;
diff --git a/llvm/test/Instrumentation/InstrProfiling/icall.ll b/llvm/test/Instrumentation/InstrProfiling/icall.ll
index 9d45d7cd56358..d6e49be337851 100644
--- a/llvm/test/Instrumentation/InstrProfiling/icall.ll
+++ b/llvm/test/Instrumentation/InstrProfiling/icall.ll
@@ -11,6 +11,7 @@
; RUN: opt < %s -mtriple=mips64-unknown-linux -instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC-SEXT
; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -vp-static-alloc=false -instrprof -S | FileCheck %s --check-prefix=DYN
; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -vp-static-alloc=false -S | FileCheck %s --check-prefix=DYN
+; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -counter-link-order -vp-static-alloc=true -S | FileCheck %s --check-prefix=METADATA
@__profn_foo = private constant [3 x i8] c"foo"
@@ -57,3 +58,12 @@ attributes #0 = { nounwind }
; STATIC: declare void @__llvm_profile_instrument_target(i64, i8*, i32)
; STATIC-EXT: declare void @__llvm_profile_instrument_target(i64, i8*, i32 zeroext)
; STATIC-SEXT: declare void @__llvm_profile_instrument_target(i64, i8*, i32 signext)
+
+; METADATA: @__profc_foo = private global [1 x i64] zeroinitializer, section "{{[^"]+}}", align 8, !associated !0
+; METADATA: @__profvp_foo = private global [1 x i64] zeroinitializer, section "{{[^"]+}}", align 8, !associated !1
+; METADATA: @__profc_bar = private global [1 x i64] zeroinitializer, section "{{[^"]+}}", comdat($__profd_bar), align 8, !associated !2
+; METADATA: @__profvp_bar = private global [1 x i64] zeroinitializer, section "{{[^"]+}}", comdat($__profd_bar), align 8, !associated !3
+; METADATA: !0 = !{i32 (i32 ()*)* @foo}
+; METADATA: !1 = !{[1 x i64]* @__profc_foo}
+; METADATA: !2 = !{i32 (i32 ()*)* @bar}
+; METADATA: !3 = !{[1 x i64]* @__profc_bar}
diff --git a/llvm/test/Instrumentation/InstrProfiling/linkage.ll b/llvm/test/Instrumentation/InstrProfiling/linkage.ll
index 6320060afe42d..ffad1f03eaa93 100644
--- a/llvm/test/Instrumentation/InstrProfiling/linkage.ll
+++ b/llvm/test/Instrumentation/InstrProfiling/linkage.ll
@@ -8,6 +8,8 @@
; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefixes=POSIX,LINUX
; RUN: opt < %s -mtriple=x86_64-unknown-fuchsia -passes=instrprof -S | FileCheck %s --check-prefixes=POSIX,LINUX
; RUN: opt < %s -mtriple=x86_64-pc-win32-coff -passes=instrprof -S | FileCheck %s --check-prefixes=COFF
+; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -counter-link-order -S | FileCheck %s --check-prefixes=LINUX,POSIX,METADATA
+; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -counter-link-order -S | FileCheck %s --check-prefixes=LINUX,POSIX,METADATA
; MACHO: @__llvm_profile_runtime = external global i32
; LINUX-NOT: @__llvm_profile_runtime = external global i32
@@ -19,7 +21,9 @@
@__profn_foo_extern = linkonce_odr hidden constant [10 x i8] c"foo_extern"
; POSIX: @__profc_foo = hidden global
+; METADATA-SAME: !associated !0
; POSIX: @__profd_foo = hidden global
+; METADATA-SAME: !associated !1
; COFF: @__profc_foo = internal global
; COFF-NOT: comdat
; COFF: @__profd_foo = internal global
@@ -29,7 +33,9 @@ define void @foo() {
}
; POSIX: @__profc_foo_weak = weak hidden global
+; METADATA: !associated !2
; POSIX: @__profd_foo_weak = weak hidden global
+; METADATA: !associated !3
; COFF: @__profc_foo_weak = internal global
; COFF: @__profd_foo_weak = internal global
define weak void @foo_weak() {
@@ -38,7 +44,9 @@ define weak void @foo_weak() {
}
; POSIX: @"__profc_linkage.ll:foo_internal" = internal global
+; METADATA-SAME: !associated !4
; POSIX: @"__profd_linkage.ll:foo_internal" = internal global
+; METADATA-SAME: !associated !5
; COFF: @"__profc_linkage.ll:foo_internal" = internal global
; COFF: @"__profd_linkage.ll:foo_internal" = internal global
define internal void @foo_internal() {
@@ -47,7 +55,9 @@ define internal void @foo_internal() {
}
; POSIX: @__profc_foo_inline = linkonce_odr hidden global
+; METADATA-SAME: !associated !6
; POSIX: @__profd_foo_inline = linkonce_odr hidden global
+; METADATA-SAME: !associated !7
; COFF: @__profc_foo_inline = internal global{{.*}} section ".lprfc$M", align 8
; COFF: @__profd_foo_inline = internal global{{.*}} section ".lprfd$M", align 8
define linkonce_odr void @foo_inline() {
@@ -56,7 +66,9 @@ define linkonce_odr void @foo_inline() {
}
; LINUX: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_cnts", comdat($__profd_foo_extern), align 8
+; METADATA-SAME: !associated !8
; LINUX: @__profd_foo_extern = linkonce_odr hidden global {{.*}}section "__llvm_prf_data", comdat, align 8
+; METADATA-SAME: !associated !9
; MACHO: @__profc_foo_extern = linkonce_odr hidden global
; MACHO: @__profd_foo_extern = linkonce_odr hidden global
; COFF: @__profc_foo_extern = linkonce_odr hidden global {{.*}}section ".lprfc$M", comdat, align 8
@@ -75,3 +87,14 @@ declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
; COFF: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} comdat {
; LINUX-NOT: define linkonce_odr hidden i32 @__llvm_profile_runtime_user() {{.*}} {
; LINUX-NOT: %[[REG:.*]] = load i32, i32* @__llvm_profile_runtime
+
+; METADATA: !0 = !{void ()* @foo}
+; METADATA: !1 = !{[1 x i64]* @__profc_foo}
+; METADATA: !2 = !{void ()* @foo_weak}
+; METADATA: !3 = !{[1 x i64]* @__profc_foo_weak}
+; METADATA: !4 = !{void ()* @foo_internal}
+; METADATA: !5 = !{[1 x i64]* @"__profc_linkage.ll:foo_internal"}
+; METADATA: !6 = !{void ()* @foo_inline}
+; METADATA: !7 = !{[1 x i64]* @__profc_foo_inline}
+; METADATA: !8 = !{void ()* @foo_extern}
+; METADATA: !9 = !{[1 x i64]* @__profc_foo_extern}
diff --git a/llvm/test/Transforms/PGOProfile/associated.ll b/llvm/test/Transforms/PGOProfile/associated.ll
new file mode 100644
index 0000000000000..3f8b4af254ae9
--- /dev/null
+++ b/llvm/test/Transforms/PGOProfile/associated.ll
@@ -0,0 +1,12 @@
+; RUN: opt < %s -pgo-instr-gen -instrprof -counter-link-order -S | FileCheck %s
+; RUN: opt < %s -passes=pgo-instr-gen,instrprof -counter-link-order -S | FileCheck %s
+
+; CHECK: @__profc_foo = private global [1 x i64] zeroinitializer, section "__llvm_prf_cnts", align 8, !associated !0
+; CHECK: @__profd_foo = private global {{.*}}, section "__llvm_prf_data", align 8, !associated !1
+
+define void @foo() {
+ ret void
+}
+
+; CHECK: !0 = !{void ()* @foo}
+; CHECK: !1 = !{[1 x i64]* @__profc_foo}
diff --git a/llvm/test/Transforms/PGOProfile/counter_promo.ll b/llvm/test/Transforms/PGOProfile/counter_promo.ll
index 55930c1be1660..a477970830beb 100644
--- a/llvm/test/Transforms/PGOProfile/counter_promo.ll
+++ b/llvm/test/Transforms/PGOProfile/counter_promo.ll
@@ -60,7 +60,7 @@ bb12: ; preds = %bb9
; ATOMIC_PROMO: atomicrmw add {{.*}} @__profc_foo{{.*}}0), i64 %[[LIVEOUT1]] seq_cst
; ATOMIC_PROMO-NEXT: atomicrmw add {{.*}} @__profc_foo{{.*}}1), i64 %[[LIVEOUT2]] seq_cst
; ATOMIC_PROMO-NEXT: atomicrmw add {{.*}} @__profc_foo{{.*}}2), i64 %[[LIVEOUT3]] seq_cst
-; PROMO-NOT: @__profc_foo
+; PROMO-NOT: @__profc_foo{{.*}})
}
diff --git a/llvm/test/Transforms/PGOProfile/counter_promo_mexits.ll b/llvm/test/Transforms/PGOProfile/counter_promo_mexits.ll
index bb799757a47cc..8e907acb34da1 100644
--- a/llvm/test/Transforms/PGOProfile/counter_promo_mexits.ll
+++ b/llvm/test/Transforms/PGOProfile/counter_promo_mexits.ll
@@ -69,7 +69,7 @@ bb15_0: ; preds = %bb11
; PROMO-NEXT: %pgocount{{.*}} = load {{.*}} @__profc_foo{{.*}} 4)
; PROMO-NEXT: add
; PROMO-NEXT: store {{.*}}@__profc_foo{{.*}}4)
-; PROMO-NOT: @__profc_foo
+; PROMO-NOT: @__profc_foo{{.*}})
bb15: ; preds = %bb14, %bb4
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