[clang] Add -fprofile-prefix-map

This flag allows you to re-write absolute paths in coverage data analogous to -fdebug-prefix-map. This flag is also implied by -ffile-prefix-map.

1 files changed, 17 insertions, 7 deletions

diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp
index c474546..5c25c20 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1544,13 +1544,6 @@ struct CounterCoverageMappingBuilder
   }
 };
 
-std::string normalizeFilename(StringRef Filename) {
-  llvm::SmallString<256> Path(Filename);
-  llvm::sys::fs::make_absolute(Path);
-  llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
-  return std::string(Path);
-}
-
 } // end anonymous namespace
 
 static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
@@ -1592,6 +1585,23 @@ static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
   }
 }
 
+CoverageMappingModuleGen::CoverageMappingModuleGen(
+    CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
+    : CGM(CGM), SourceInfo(SourceInfo) {
+  ProfilePrefixMap = CGM.getCodeGenOpts().ProfilePrefixMap;
+}
+
+std::string CoverageMappingModuleGen::normalizeFilename(StringRef Filename) {
+  llvm::SmallString<256> Path(Filename);
+  llvm::sys::fs::make_absolute(Path);
+  llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
+  for (const auto &Entry : ProfilePrefixMap) {
+    if (llvm::sys::path::replace_path_prefix(Path, Entry.first, Entry.second))
+      break;
+  }
+  return Path.str().str();
+}
+
 static std::string getInstrProfSection(const CodeGenModule &CGM,
                                        llvm::InstrProfSectKind SK) {
   return llvm::getInstrProfSectionName(