Recursively remove dead argument while removing llvm.dbg.declare intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65971 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/Transforms/IPO/StripSymbols.cpp b/lib/Transforms/IPO/StripSymbols.cpp
index 3906b5111e..fbb2075cb4 100644
--- a/lib/Transforms/IPO/StripSymbols.cpp
+++ b/lib/Transforms/IPO/StripSymbols.cpp
@@ -28,6 +28,7 @@
 #include "llvm/Pass.h"
 #include "llvm/ValueSymbolTable.h"
 #include "llvm/TypeSymbolTable.h"
+#include "llvm/Transforms/Utils/Local.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/ADT/SmallPtrSet.h"
 using namespace llvm;
@@ -268,8 +269,8 @@ bool StripDebugInfo(Module &M) {
       if (Arg1->use_empty()) {
         if (Constant *C = dyn_cast<Constant>(Arg1)) 
           DeadConstants.push_back(C);
-        if (Instruction *I = dyn_cast<Instruction>(Arg1))
-          I->eraseFromParent();
+        else 
+          RecursivelyDeleteTriviallyDeadInstructions(Arg1, NULL);
       }
       if (Arg2->use_empty())
         if (Constant *C = dyn_cast<Constant>(Arg2))