From: Sanjoy Das <sanjoy@playingwithpointers.com>
Date: Fri, 25 Sep 2015 19:59:52 +0000 (+0000)
Subject: [SCEV] Extract helper function from isImpliedCond; NFC
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=f5a027d2d3fd48d0e6a9b853270c7576877cd4cc

[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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248607 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/ScalarEvolution.h b/include/llvm/Analysis/ScalarEvolution.h
index f1efeb877fa..62d66c246d7 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/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/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index a3763c354d2..f87a5596c86 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/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())) {