[-gmodules] Honor -fdebug-prefix-map in the debug info inside PCMs.
This patch passes -fdebug-prefix-map (a feature for renaming source
paths in the debug info) through to the per-module codegen options and
adds the debug prefix map to the module hash.
<rdar://problem/46045865>
Differential Revision: https://reviews.llvm.org/D55037
llvm-svn: 347926
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 8840e2e..f511fdc 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3264,6 +3264,12 @@
code = ext->hashExtension(code);
}
+ // When compiling with -gmodules, also hash -fdebug-prefix-map as it
+ // affects the debug info in the PCM.
+ if (getCodeGenOpts().DebugTypeExtRefs)
+ for (const auto &KeyValue : getCodeGenOpts().DebugPrefixMap)
+ code = hash_combine(code, KeyValue.first, KeyValue.second);
+
// Extend the signature with the enabled sanitizers, if at least one is
// enabled. Sanitizers which cannot affect AST generation aren't hashed.
SanitizerSet SanHash = LangOpts->Sanitize;