[PATCH] D124767: [Clang] Map .gcda paths according to -fcoverage-prefix-map

[Vitaly Cheptsov via Phabricator via cfe-commits]

vit9696 created this revision.
vit9696 added reviewers: keith, phosek.
Herald added a project: All.
vit9696 requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

https://github.com/llvm/llvm-project/issues/54670


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124767

Files:
  clang/lib/CodeGen/CodeGenModule.cpp


Index: clang/lib/CodeGen/CodeGenModule.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenModule.cpp
+++ clang/lib/CodeGen/CodeGenModule.cpp
@@ -6550,8 +6550,20 @@
 
   llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov");
   llvm::LLVMContext &Ctx = TheModule.getContext();
-  auto *CoverageDataFile =
+  auto &PrefixMap = getCodeGenOpts().CoveragePrefixMap;
+  llvm::SmallString<256> File;
+  if (!PrefixMap.empty()) {
+    File = getCodeGenOpts().CoverageDataFile;
+    llvm::sys::path::remove_dots(File, /*remove_dot_dot=*/true);
+    for (const auto &Entry : PrefixMap) {
+      if (llvm::sys::path::replace_path_prefix(File, Entry.first, Entry.second))
+        break;
+    }
+    CoverageDataFile = llvm::MDString::get(Ctx, File.c_str());
+  } else {
+    CoverageDataFile =
       llvm::MDString::get(Ctx, getCodeGenOpts().CoverageDataFile);
+  }
   auto *CoverageNotesFile =
       llvm::MDString::get(Ctx, getCodeGenOpts().CoverageNotesFile);
   for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) {


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