[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, 6 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index d18e6b9..3656410 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -990,6 +990,12 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
         {std::string(Split.first), std::string(Split.second)});
   }
 
+  for (const auto &Arg : Args.getAllArgValues(OPT_fprofile_prefix_map_EQ)) {
+    auto Split = StringRef(Arg).split('=');
+    Opts.ProfilePrefixMap.insert(
+        {std::string(Split.first), std::string(Split.second)});
+  }
+
   const llvm::Triple::ArchType DebugEntryValueArchs[] = {
       llvm::Triple::x86, llvm::Triple::x86_64, llvm::Triple::aarch64,
       llvm::Triple::arm, llvm::Triple::armeb, llvm::Triple::mips,