Remove all dbg symobls, including those with circular references.
This is ugly, but I can't figure out a quick way out of this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65889 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/StripSymbols.cpp b/lib/Transforms/IPO/StripSymbols.cpp
index 47a18e2..3906b51 100644
--- a/lib/Transforms/IPO/StripSymbols.cpp
+++ b/lib/Transforms/IPO/StripSymbols.cpp
@@ -185,6 +185,21 @@
// llvm.dbg.region.end calls, and any globals they point to if now dead.
bool StripDebugInfo(Module &M) {
+ SmallPtrSet<const GlobalValue*, 8> llvmUsedValues;
+ findUsedValues(M, llvmUsedValues);
+
+ // 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);
+ if (!GV) continue;
+ if (!GV->use_empty() && llvmUsedValues.count(I) == 0) {
+ if (strncmp(GV->getNameStart(), "llvm.dbg", 8) == 0) {
+ GV->replaceAllUsesWith(UndefValue::get(GV->getType()));
+ }
+ }
+ }
+
Function *FuncStart = M.getFunction("llvm.dbg.func.start");
Function *StopPoint = M.getFunction("llvm.dbg.stoppoint");
Function *RegionStart = M.getFunction("llvm.dbg.region.start");
@@ -263,9 +278,6 @@
Declare->eraseFromParent();
}
- SmallPtrSet<const GlobalValue*, 8> llvmUsedValues;
- findUsedValues(M, llvmUsedValues);
-
// llvm.dbg.compile_units and llvm.dbg.subprograms are marked as linkonce
// but since we are removing all debug information, make them internal now.
// FIXME: Use private linkage maybe?