From: Philip Reames <listmail@philipreames.com>
Date: Wed, 3 Jul 2019 18:24:06 +0000 (+0000)
Subject: [LFTR] Remove falsely generalized (dead) code [NFC]
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d9219bd3001d883c7a59f0c957de5c64bc4a6f47;p=llvm

[LFTR] Remove falsely generalized (dead) code [NFC]



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365067 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 4f939b21a2e..0566a1558b0 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -2477,11 +2477,8 @@ linearFunctionTestReplace(Loop *L, BasicBlock *ExitingBB,
       Count = Count.zext(CmpIndVarSize);
       if (UsePostInc)
         ++Count;
-      APInt NewLimit;
-      if (cast<SCEVConstant>(ARStep)->getValue()->isNegative())
-        NewLimit = Start - Count;
-      else
-        NewLimit = Start + Count;
+      assert(cast<SCEVConstant>(ARStep)->getValue()->isOne());
+      APInt NewLimit = Start + Count;
       ExitCnt = ConstantInt::get(CmpIndVar->getType(), NewLimit);
     } else {
       // We try to extend trip count first. If that doesn't work we truncate IV.