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Add sample-profile-suffix-elision-policy attribute with -funique-internal-linkage-names.

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Adding sample-profile-suffix-elision-policy attribute to functions whose linkage names are uniquefied so that their unique name suffix won't be trimmed when applying AutoFDO profiles.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D94455
This commit is contained in:
Hongtao Yu 2020-12-22 22:43:22 -08:00
parent e423e154e0
commit ab8997cebd
2 changed files with 3 additions and 1 deletions
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1
lib/Transforms/Utils/UniqueInternalLinkageNames.cpp
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@ -43,6 +43,7 @@ static bool uniqueifyInternalLinkageNames(Module &M) {
for (auto &F : M) {
if (F.hasInternalLinkage()) {
F.setName(F.getName() + ModuleNameHash);
F.addFnAttr("sample-profile-suffix-elision-policy", "selected");
// Replace linkage names in the debug metadata.
if (DISubprogram *SP = F.getSubprogram()) {
if (SP->getRawLinkageName()) {

3
test/Transforms/UniqueInternalLinkageNames/unique-internal-linkage-names.ll
View File

@ -42,8 +42,9 @@ entry:
; O2: Running pass: UniqueInternalLinkageNamesPass
; O2: Running pass: SampleProfileProbePass
; UNIQUE: define internal i32 @foo.__uniq.{{[0-9]+}}()
; UNIQUE: define internal i32 @foo.__uniq.{{[0-9]+}}() [[ATTR:#[0-9]+]]
; UNIQUE: ret {{.*}} @foo.__uniq.{{[0-9]+}} {{.*}}
; UNIQUE: attributes [[ATTR]] = {{{.*}} "sample-profile-suffix-elision-policy"="selected" {{.*}}}
; DBG: distinct !DISubprogram(name: "foo", linkageName: "foo.__uniq.{{[0-9]+}}", scope: ![[#]]
; DBG: !DISubprogram(name: "foo", linkageName: "foo.__uniq.{{[0-9]+}}", scope: ![[#]]