Don't replace *all* uses with the new stuff.

This is not necessarily the first or dominating use of the EH values. The IR
breaks if it's not. So replace the specific value in the instruction with the
new value.

llvm-svn: 138406

lib/CodeGen/SjLjEHPrepare.cpp

@@ -347,7 +347,7 @@ static void ReplaceLandingPadVal(Function &F, Instruction *Inst, Value *ExnAddr,
       continue;
     }
 
-    Inst->replaceAllUsesWith(CreateLandingPadLoad(F, ExnAddr, SelAddr, I));
+    I->replaceUsesOfWith(Inst, CreateLandingPadLoad(F, ExnAddr, SelAddr, I));
   }
 }