From 6d2db9edb2e66162dd85d4ccca67840aceb76966 Mon Sep 17 00:00:00 2001
From: Daniel Berlin <dberlin@dberlin.org>
Date: Wed, 14 Jun 2017 21:19:52 +0000
Subject: PredicateInfo: Don't insert conditional info when a conditional
 branch jumps to the same target regardless of condition

llvm-svn: 305416
---
 llvm/lib/Transforms/Utils/PredicateInfo.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Transforms/Utils/PredicateInfo.cpp')

diff --git a/llvm/lib/Transforms/Utils/PredicateInfo.cpp b/llvm/lib/Transforms/Utils/PredicateInfo.cpp
index 9e71cba4f1b..1260e35e934 100644
--- a/llvm/lib/Transforms/Utils/PredicateInfo.cpp
+++ b/llvm/lib/Transforms/Utils/PredicateInfo.cpp
@@ -460,6 +460,9 @@ void PredicateInfo::buildPredicateInfo() {
     if (auto *BI = dyn_cast<BranchInst>(BranchBB->getTerminator())) {
       if (!BI->isConditional())
         continue;
+      // Can't insert conditional information if they all go to the same place.
+      if (BI->getSuccessor(0) == BI->getSuccessor(1))
+        continue;
       processBranch(BI, BranchBB, OpsToRename);
     } else if (auto *SI = dyn_cast<SwitchInst>(BranchBB->getTerminator())) {
       processSwitch(SI, BranchBB, OpsToRename);
-- 
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