[codeview] Merge file checksum entries for DIFiles with the same absolute path

Change the map key from DIFile* to the absolute path string. Computing
the absolute path isn't expensive because we already have a map that
caches the full path keyed on DIFile*.

llvm-svn: 317041

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index 7d50d64..67bab8c 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -154,11 +154,11 @@ StringRef CodeViewDebug::getFullFilepath(const DIFile *File) {
 }
 
 unsigned CodeViewDebug::maybeRecordFile(const DIFile *F) {
+  StringRef FullPath = getFullFilepath(F);
   unsigned NextId = FileIdMap.size() + 1;
-  auto Insertion = FileIdMap.insert(std::make_pair(F, NextId));
+  auto Insertion = FileIdMap.insert(std::make_pair(FullPath, NextId));
   if (Insertion.second) {
     // We have to compute the full filepath and emit a .cv_file directive.
-    StringRef FullPath = getFullFilepath(F);
     std::string Checksum = fromHex(F->getChecksum());
     void *CKMem = OS.getContext().allocate(Checksum.size(), 1);
     memcpy(CKMem, Checksum.data(), Checksum.size());