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Set function entry count as 0 if sample profile is not found for the function.

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Summary: This change makes the sample profile's behavior consistent with instr profile.

Reviewers: davidxl, eraman, dnovillo

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D17522

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261587 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dehao Chen 2016-02-22 22:46:21 +00:00
parent b23b0fffbc
commit be55cfa5fd
2 changed files with 8 additions and 0 deletions
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1
lib/Transforms/IPO/SampleProfile.cpp
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@ -1257,6 +1257,7 @@ bool SampleProfileLoader::runOnModule(Module &M) {
}
bool SampleProfileLoader::runOnFunction(Function &F) {
F.setEntryCount(0);
Samples = Reader->getSamplesFor(F);
if (!Samples->empty())
return emitAnnotations(F);

7
test/Transforms/SampleProfile/entry_counts.ll
View File

@ -8,6 +8,13 @@ entry:
ret void, !dbg !9
}
; This function does not have profile, check if function_entry_count is 0
; CHECK: {{.*}} = !{!"function_entry_count", i64 0}
define void @no_profile() {
entry:
ret void
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!6, !7}
!llvm.ident = !{!8}