Remove debug info anchors - llvm.dbg.compile_units, llvm.dbg.subprograms
and llvm.dbg.global_variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74251 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/StripSymbols.cpp b/lib/Transforms/IPO/StripSymbols.cpp
index ab8fe5f..046e044 100644
--- a/lib/Transforms/IPO/StripSymbols.cpp
+++ b/lib/Transforms/IPO/StripSymbols.cpp
@@ -26,6 +26,7 @@
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Pass.h"
+#include "llvm/Analysis/DebugInfo.h"
#include "llvm/ValueSymbolTable.h"
#include "llvm/TypeSymbolTable.h"
#include "llvm/Transforms/Utils/Local.h"
@@ -210,7 +211,25 @@
SmallPtrSet<const GlobalValue*, 8> llvmUsedValues;
findUsedValues(M, llvmUsedValues);
- // Delete all dbg variables.
+ SmallVector<GlobalVariable *, 2> CUs;
+ SmallVector<GlobalVariable *, 4> GVs;
+ SmallVector<GlobalVariable *, 4> SPs;
+ CollectDebugInfoAnchors(M, CUs, GVs, SPs);
+ // These anchors use LinkOnce linkage so that the optimizer does not
+ // remove them accidently. Set InternalLinkage for all these debug
+ // info anchors.
+ for (SmallVector<GlobalVariable *, 2>::iterator I = CUs.begin(),
+ E = CUs.end(); I != E; ++I)
+ (*I)->setLinkage(GlobalValue::InternalLinkage);
+ for (SmallVector<GlobalVariable *, 4>::iterator I = GVs.begin(),
+ E = GVs.end(); I != E; ++I)
+ (*I)->setLinkage(GlobalValue::InternalLinkage);
+ for (SmallVector<GlobalVariable *, 4>::iterator I = SPs.begin(),
+ E = SPs.end(); I != E; ++I)
+ (*I)->setLinkage(GlobalValue::InternalLinkage);
+
+
+ // Delete all dbg variables.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
GlobalVariable *GV = dyn_cast<GlobalVariable>(I);