From 388af14f859b58a98c2400e4b4469922ea788d2f Mon Sep 17 00:00:00 2001
From: Florian Hahn <florian.hahn@arm.com>
Date: Thu, 28 Jun 2018 09:53:38 +0000
Subject: [SCCP] Mark CFG as preserved.

SCCP does not change the CFG, so we can mark it as preserved.

Reviewers: dberlin, efriedma, davide

Reviewed By: davide

Differential Revision: https://reviews.llvm.org/D47149

llvm-svn: 335820
---
 llvm/lib/Transforms/Scalar/SCCP.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Transforms')

diff --git a/llvm/lib/Transforms/Scalar/SCCP.cpp b/llvm/lib/Transforms/Scalar/SCCP.cpp
index 33eb80734d1..af201257135 100644
--- a/llvm/lib/Transforms/Scalar/SCCP.cpp
+++ b/llvm/lib/Transforms/Scalar/SCCP.cpp
@@ -1777,6 +1777,7 @@ PreservedAnalyses SCCPPass::run(Function &F, FunctionAnalysisManager &AM) {
 
   auto PA = PreservedAnalyses();
   PA.preserve<GlobalsAA>();
+  PA.preserveSet<CFGAnalyses>();
   return PA;
 }
 
@@ -1799,6 +1800,7 @@ public:
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<TargetLibraryInfoWrapperPass>();
     AU.addPreserved<GlobalsAAWrapperPass>();
+    AU.setPreservesCFG();
   }
 
   // runOnFunction - Run the Sparse Conditional Constant Propagation
-- 
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