Revert "Use -fdebug-compilation-dir to form absolute paths in coverage mappings"

This reverts commit 9d4806a387892972fd544c0dcaefb0926126220c.

There seem to be bugs in llvm-cov --path-equivalence that are causing
Chromium problems. Revert this until they are understood or fixed.

2 files changed, 9 insertions, 24 deletions

diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp
index a6f6e38d5f1..0a7a4fe33ac 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -1278,6 +1278,13 @@ std::string getCoverageSection(const CodeGenModule &CGM) {
       CGM.getContext().getTargetInfo().getTriple().getObjectFormat());
 }
 
+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 Path.str().str();
+}
+
 } // end anonymous namespace
 
 static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
@@ -1310,24 +1317,6 @@ static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
   }
 }
 
-CoverageMappingModuleGen::CoverageMappingModuleGen(
-    CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
-    : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {
-  // Honor -fdebug-compilation-dir in paths in coverage data. Otherwise, use the
-  // regular working directory when normalizing paths.
-  if (!CGM.getCodeGenOpts().DebugCompilationDir.empty())
-    CWD = CGM.getCodeGenOpts().DebugCompilationDir;
-  else
-    llvm::sys::fs::current_path(CWD);
-}
-
-std::string CoverageMappingModuleGen::normalizeFilename(StringRef Filename) {
-  llvm::SmallString<256> Path(Filename);
-  llvm::sys::fs::make_absolute(CWD, Path);
-  llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
-  return Path.str().str();
-}
-
 void CoverageMappingModuleGen::addFunctionMappingRecord(
     llvm::GlobalVariable *NamePtr, StringRef NameValue, uint64_t FuncHash,
     const std::string &CoverageMapping, bool IsUsed) {
diff --git a/clang/lib/CodeGen/CoverageMappingGen.h b/clang/lib/CodeGen/CoverageMappingGen.h
index 2bdc00e2566..3bf51f59047 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.h
+++ b/clang/lib/CodeGen/CoverageMappingGen.h
@@ -54,14 +54,10 @@ class CoverageMappingModuleGen {
   std::vector<llvm::Constant *> FunctionNames;
   llvm::StructType *FunctionRecordTy;
   std::vector<std::string> CoverageMappings;
-  SmallString<256> CWD;
-
-  /// Make the filename absolute, remove dots, and normalize slashes to local
-  /// path style.
-  std::string normalizeFilename(StringRef Filename);
 
 public:
-  CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo);
+  CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
+      : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
 
   CoverageSourceInfo &getSourceInfo() const {
     return SourceInfo;