Use Instruction::eraseFromParent().

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52606 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/ConstantProp.cpp

@@ -79,7 +79,7 @@ bool ConstantPropagation::runOnFunction(Function &F) {
 
         // Remove the dead instruction.
         WorkList.erase(I);
-        I->getParent()->getInstList().erase(I);
+        I->eraseFromParent();
 
         // We made a change to the function...
         Changed = true;

lib/Transforms/Scalar/GCSE.cpp

@@ -201,5 +201,5 @@ void GCSE::ReplaceInstructionWith(Instruction *I, Value *V) {
   }
 
   // Erase the instruction from the program.
-  I->getParent()->getInstList().erase(I);
+  I->eraseFromParent();
 }