[safestack] Fixup llvm.dbg.value when rewriting unsafe allocas.

When moving unsafe allocas to the unsafe stack, dbg.declare intrinsics are
updated to refer to the new location.

This change does the same to dbg.value intrinsics.

llvm-svn: 272968

llvm/lib/CodeGen/SafeStack.cpp

@@ -614,6 +614,7 @@ Value *SafeStack::moveStaticAllocasToUnsafeStack(
 
     // Replace alloc with the new location.
     replaceDbgDeclareForAlloca(AI, BasePointer, DIB, /*Deref=*/true, -StaticOffset);
+    replaceDbgValueForAlloca(AI, BasePointer, DIB, -StaticOffset);
     AI->replaceAllUsesWith(NewAI);
     AI->eraseFromParent();
   }