[llvm] r354612 - [EarlyCSE] Cleanup deadcode. [NFCI]

[Alina Sbirlea via llvm-commits]

Author: asbirlea
Date: Thu Feb 21 11:49:57 2019
New Revision: 354612

URL: http://llvm.org/viewvc/llvm-project?rev=354612&view=rev
Log:
[EarlyCSE] Cleanup deadcode. [NFCI]

Summary: Cleanup nop assignments.

Reviewers: george.burgess.iv, davide

Subscribers: sanjoy, jlebar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58308

Modified:
    llvm/trunk/lib/Transforms/Scalar/EarlyCSE.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/EarlyCSE.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/EarlyCSE.cpp?rev=354612&r1=354611&r2=354612&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/EarlyCSE.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/EarlyCSE.cpp Thu Feb 21 11:49:57 2019
@@ -1169,8 +1169,7 @@ bool EarlyCSE::run() {
       CurrentGeneration, DT.getRootNode(),
       DT.getRootNode()->begin(), DT.getRootNode()->end()));
 
-  // Save the current generation.
-  unsigned LiveOutGeneration = CurrentGeneration;
+  assert(!CurrentGeneration && "Create a new EarlyCSE instance to rerun it.");
 
   // Process the stack.
   while (!nodesToProcess.empty()) {
@@ -1202,9 +1201,6 @@ bool EarlyCSE::run() {
     }
   } // while (!nodes...)
 
-  // Reset the current generation.
-  CurrentGeneration = LiveOutGeneration;
-
   return Changed;
 }