Debug Info: move StripDebugInfo from StripSymbols.cpp to DebugInfo.cpp.

We can share the implementation between StripSymbols and dropping debug info
for metadata versions that do not match.

Also update the comments to match the implementation. A follow-on patch will
drop the "Debug Info Version" module flag in StripDebugInfo.

llvm-svn: 195505

1 files changed, 0 insertions, 51 deletions

diff --git a/llvm/lib/Transforms/IPO/StripSymbols.cpp b/llvm/lib/Transforms/IPO/StripSymbols.cpp
index 1792aa866d2..c4f5cfc1b35 100644
--- a/llvm/lib/Transforms/IPO/StripSymbols.cpp
+++ b/llvm/lib/Transforms/IPO/StripSymbols.cpp
@@ -231,57 +231,6 @@ static bool StripSymbolNames(Module &M, bool PreserveDbgInfo) {
   return true;
 }
 
-// StripDebugInfo - Strip debug info in the module if it exists.
-// To do this, we remove llvm.dbg.func.start, llvm.dbg.stoppoint, and
-// llvm.dbg.region.end calls, and any globals they point to if now dead.
-static bool StripDebugInfo(Module &M) {
-
-  bool Changed = false;
-
-  // Remove all of the calls to the debugger intrinsics, and remove them from
-  // the module.
-  if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
-    while (!Declare->use_empty()) {
-      CallInst *CI = cast<CallInst>(Declare->use_back());
-      CI->eraseFromParent();
-    }
-    Declare->eraseFromParent();
-    Changed = true;
-  }
-
-  if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
-    while (!DbgVal->use_empty()) {
-      CallInst *CI = cast<CallInst>(DbgVal->use_back());
-      CI->eraseFromParent();
-    }
-    DbgVal->eraseFromParent();
-    Changed = true;
-  }
-
-  for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
-         NME = M.named_metadata_end(); NMI != NME;) {
-    NamedMDNode *NMD = NMI;
-    ++NMI;
-    if (NMD->getName().startswith("llvm.dbg.")) {
-      NMD->eraseFromParent();
-      Changed = true;
-    }
-  }
-
-  for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
-    for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
-         ++FI)
-      for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
-           ++BI) {
-        if (!BI->getDebugLoc().isUnknown()) {
-          Changed = true;
-          BI->setDebugLoc(DebugLoc());
-        }
-      }
-
-  return Changed;
-}
-
 bool StripSymbols::runOnModule(Module &M) {
   bool Changed = false;
   Changed |= StripDebugInfo(M);