commit 2d51bcbd11ce3a5b1f9ef7df2b23230f5e7a2b77
author Justin Bogner <mail@justinbogner.com> Wed Feb 04 00:12:18 2015 +0000
committer Copybara-Service <copybara-worker@google.com> Fri Oct 02 12:50:50 2020 -0700
tree 28068b00ac10b002765ca67de2a8fcd40306351c
parent 058079ff835d0046de863a0a767d6381708bf5af

InstrProf: Use a stable sort when reading coverage regions

Keeping regions that start at the same location in insertion order
makes this logic easier to test / more deterministic.

llvm-svn: 228083
GitOrigin-RevId: 70e0c09e6c0d19d8eba4740d20bf58ae9274bc47

lib/ProfileData/CoverageMappingWriter.cpp

diff --git a/lib/ProfileData/CoverageMappingWriter.cpp b/lib/ProfileData/CoverageMappingWriter.cpp
index aef5511..d90d2f5 100644
--- a/lib/ProfileData/CoverageMappingWriter.cpp
+++ b/lib/ProfileData/CoverageMappingWriter.cpp
@@ -109,7 +109,7 @@
 void CoverageMappingWriter::write(raw_ostream &OS) {
   // Sort the regions in an ascending order by the file id and the starting
   // location.
-  std::sort(MappingRegions.begin(), MappingRegions.end());
+  std::stable_sort(MappingRegions.begin(), MappingRegions.end());
 
   // Write out the fileid -> filename mapping.
   encodeULEB128(VirtualFileMapping.size(), OS);