r266852 - Enable ODR uniquing of DITypes for ThinLTO backends

[Teresa Johnson via cfe-commits]

Author: tejohnson
Date: Tue Apr 19 21:23:52 2016
New Revision: 266852

URL: http://llvm.org/viewvc/llvm-project?rev=266852&view=rev
Log:
Enable ODR uniquing of DITypes for ThinLTO backends

Summary:
This is a follow-on to apply Duncan's new DIType ODR uniquing from
r266549 and r266713 in more places.

When invoking ThinLTO backend compiles via clang (for a distributed
build), invoke enableDebugTypeODRUniquing() before parsing the module.

Reviewers: dexonsmith, joker.eph

Subscribers: llvm-commits, joker.eph

Differential Revision: http://reviews.llvm.org/D19264

Modified:
    cfe/trunk/lib/CodeGen/CodeGenAction.cpp

Modified: cfe/trunk/lib/CodeGen/CodeGenAction.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CodeGenAction.cpp?rev=266852&r1=266851&r2=266852&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CodeGenAction.cpp (original)
+++ cfe/trunk/lib/CodeGen/CodeGenAction.cpp Tue Apr 19 21:23:52 2016
@@ -794,6 +794,11 @@ void CodeGenAction::ExecuteAction() {
     if (Invalid)
       return;
 
+    // For ThinLTO backend invocations, ensure that the context
+    // merges types based on ODR identifiers.
+    if (!CI.getCodeGenOpts().ThinLTOIndexFile.empty())
+      VMContext->enableDebugTypeODRUniquing();
+
     llvm::SMDiagnostic Err;
     TheModule = parseIR(MainFile->getMemBufferRef(), Err, *VMContext);
     if (!TheModule) {