From df1635d3941600c1873d8eceb494edf7c32ee920 Mon Sep 17 00:00:00 2001
From: Sanjoy Das <sanjoy@playingwithpointers.com>
Date: Fri, 25 Sep 2015 19:59:52 +0000
Subject: [PATCH] [SCEV] Extract helper function from isImpliedCond; NFC

Summary:
This new helper routine will be used in a subsequent change.

Reviewers: hfinkel

Subscribers: hfinkel, sanjoy, llvm-commits

Differential Revision: http://reviews.llvm.org/D12949

llvm-svn: 248607
---
 llvm/include/llvm/Analysis/ScalarEvolution.h | 7 +++++++
 llvm/lib/Analysis/ScalarEvolution.cpp        | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/llvm/include/llvm/Analysis/ScalarEvolution.h b/llvm/include/llvm/Analysis/ScalarEvolution.h
index f1efeb877fa1..62d66c246d71 100644
--- a/llvm/include/llvm/Analysis/ScalarEvolution.h
+++ b/llvm/include/llvm/Analysis/ScalarEvolution.h
@@ -506,6 +506,13 @@ namespace llvm {
                        Value *FoundCondValue,
                        bool Inverse);
 
+    /// Test whether the condition described by Pred, LHS, and RHS is true
+    /// whenever the condition described by FoundPred, FoundLHS, FoundRHS is
+    /// true.
+    bool isImpliedCond(ICmpInst::Predicate Pred, const SCEV *LHS,
+                       const SCEV *RHS, ICmpInst::Predicate FoundPred,
+                       const SCEV *FoundLHS, const SCEV *FoundRHS);
+
     /// Test whether the condition described by Pred, LHS, and RHS is true
     /// whenever the condition described by Pred, FoundLHS, and FoundRHS is
     /// true.
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index a3763c354d2d..f87a5596c866 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -7151,6 +7151,14 @@ bool ScalarEvolution::isImpliedCond(ICmpInst::Predicate Pred,
   const SCEV *FoundLHS = getSCEV(ICI->getOperand(0));
   const SCEV *FoundRHS = getSCEV(ICI->getOperand(1));
 
+  return isImpliedCond(Pred, LHS, RHS, FoundPred, FoundLHS, FoundRHS);
+}
+
+bool ScalarEvolution::isImpliedCond(ICmpInst::Predicate Pred, const SCEV *LHS,
+                                    const SCEV *RHS,
+                                    ICmpInst::Predicate FoundPred,
+                                    const SCEV *FoundLHS,
+                                    const SCEV *FoundRHS) {
   // Balance the types.
   if (getTypeSizeInBits(LHS->getType()) <
       getTypeSizeInBits(FoundLHS->getType())) {