SamplePGO - Sort samples by source location when emitting as text.

When dumping function samples or writing them out as text format, it
helps if the samples are emitted sorted by source location. The sorting
of the maps is a bit slow, so we only do it on demand.

llvm-svn: 253568

1 files changed, 8 insertions, 5 deletions

diff --git a/llvm/lib/ProfileData/SampleProf.cpp b/llvm/lib/ProfileData/SampleProf.cpp
index 3d75d230fb6..c376a8bbd98 100644
--- a/llvm/lib/ProfileData/SampleProf.cpp
+++ b/llvm/lib/ProfileData/SampleProf.cpp
@@ -108,15 +108,18 @@ void FunctionSamples::print(raw_ostream &OS, unsigned Indent) const {
   OS << TotalSamples << ", " << TotalHeadSamples << ", " << BodySamples.size()
      << " sampled lines\n";
 
-  for (const auto &SI : BodySamples) {
+  SampleSorter<LineLocation, SampleRecord> SortedBodySamples(BodySamples);
+  for (const auto &SI : SortedBodySamples.get()) {
     OS.indent(Indent);
-    OS << SI.first << ": " << SI.second;
+    OS << SI->first << ": " << SI->second;
   }
 
-  for (const auto &CS : CallsiteSamples) {
+  SampleSorter<CallsiteLocation, FunctionSamples> SortedCallsiteSamples(
+      CallsiteSamples);
+  for (const auto &CS : SortedCallsiteSamples.get()) {
     OS.indent(Indent);
-    OS << CS.first << ": ";
-    CS.second.print(OS, Indent + 2);
+    OS << CS->first << ": ";
+    CS->second.print(OS, Indent + 2);
   }
 }