[llvm] r294511 - ThinLTOBitcodeWriter: Strip debug info from merged module.

[Peter Collingbourne via llvm-commits]

Author: pcc
Date: Wed Feb  8 14:44:00 2017
New Revision: 294511

URL: http://llvm.org/viewvc/llvm-project?rev=294511&view=rev
Log:
ThinLTOBitcodeWriter: Strip debug info from merged module.

This module will contain nothing but vtable definitions and (soon)
available_externally function definitions, so there is no point in keeping
debug info in the module.

Differential Revision: https://reviews.llvm.org/D28913

Modified:
    llvm/trunk/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
    llvm/trunk/test/Transforms/ThinLTOBitcodeWriter/split.ll

Modified: llvm/trunk/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp?rev=294511&r1=294510&r2=294511&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/ThinLTOBitcodeWriter.cpp Wed Feb  8 14:44:00 2017
@@ -19,6 +19,7 @@
 #include "llvm/Analysis/TypeMetadataUtils.h"
 #include "llvm/Bitcode/BitcodeWriter.h"
 #include "llvm/IR/Constants.h"
+#include "llvm/IR/DebugInfo.h"
 #include "llvm/IR/Intrinsics.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/PassManager.h"
@@ -261,6 +262,7 @@ void splitAndWriteThinLTOBitcode(raw_ost
 
   ValueToValueMapTy VMap;
   std::unique_ptr<Module> MergedM(CloneModule(&M, VMap, IsInMergedM));
+  StripDebugInfo(*MergedM);
 
   filterModule(&M, [&](const GlobalValue *GV) { return !IsInMergedM(GV); });
 

Modified: llvm/trunk/test/Transforms/ThinLTOBitcodeWriter/split.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/ThinLTOBitcodeWriter/split.ll?rev=294511&r1=294510&r2=294511&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/ThinLTOBitcodeWriter/split.ll (original)
+++ llvm/trunk/test/Transforms/ThinLTOBitcodeWriter/split.ll Wed Feb  8 14:44:00 2017
@@ -26,3 +26,10 @@ define i8* @f() {
 
 ; M1: !0 = !{i32 0, !"typeid"}
 !0 = !{i32 0, !"typeid"}
+
+; M0: !llvm.dbg.cu
+; M1-NOT: !llvm.dbg.cu
+!llvm.dbg.cu = !{}
+
+!1 = !{i32 2, !"Debug Info Version", i32 3}
+!llvm.module.flags = !{!1}