[llvm] 5afef79 - [NFC, StackSafety] Remove duplicate code

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2020-05-26T18:09:43-07:00
New Revision: 5afef79ff465e1711a9412f6814d66ff80f50dcf

URL: https://github.com/llvm/llvm-project/commit/5afef79ff465e1711a9412f6814d66ff80f50dcf
DIFF: https://github.com/llvm/llvm-project/commit/5afef79ff465e1711a9412f6814d66ff80f50dcf.diff

LOG: [NFC, StackSafety] Remove duplicate code

Added: 
    

Modified: 
    llvm/lib/Analysis/StackSafetyAnalysis.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/StackSafetyAnalysis.cpp b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
index 4985647c29d4..223f99804bda 100644
--- a/llvm/lib/Analysis/StackSafetyAnalysis.cpp
+++ b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
@@ -242,14 +242,7 @@ StackSafetyLocalAnalysis::getAccessRange(Value *Addr, Value *Base,
   if (SizeRange.isEmptySet())
     return ConstantRange::getEmpty(PointerSize);
 
-  if (!SE.isSCEVable(Addr->getType()))
-    return UnknownRange;
-
-  AllocaOffsetRewriter Rewriter(SE, Base);
-  const SCEV *Expr = Rewriter.visit(SE.getSCEV(Addr));
-
-  ConstantRange AccessStartRange =
-      SE.getUnsignedRange(Expr).zextOrTrunc(PointerSize);
+  ConstantRange AccessStartRange = offsetFrom(Addr, Base);
   ConstantRange AccessRange = AccessStartRange.add(SizeRange);
   assert(!AccessRange.isEmptySet());
   return AccessRange;