[llvm] b3a8a15 - [LAA] Minor code style tweaks [NFC]

[Philip Reames via llvm-commits]

Author: Philip Reames
Date: 2020-11-24T15:49:27-08:00
New Revision: b3a8a153433f65c419b891ae6763f458b33e9605

URL: https://github.com/llvm/llvm-project/commit/b3a8a153433f65c419b891ae6763f458b33e9605
DIFF: https://github.com/llvm/llvm-project/commit/b3a8a153433f65c419b891ae6763f458b33e9605.diff

LOG: [LAA] Minor code style tweaks [NFC]

Added: 
    

Modified: 
    llvm/lib/Analysis/LoopAccessAnalysis.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Analysis/LoopAccessAnalysis.cpp b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
index 34de1a052ddf..0bffa7dbddec 100644
--- a/llvm/lib/Analysis/LoopAccessAnalysis.cpp
+++ b/llvm/lib/Analysis/LoopAccessAnalysis.cpp
@@ -149,27 +149,23 @@ const SCEV *llvm::replaceSymbolicStrideSCEV(PredicatedScalarEvolution &PSE,
   // symbolic stride replaced by one.
   ValueToValueMap::const_iterator SI =
       PtrToStride.find(OrigPtr ? OrigPtr : Ptr);
-  if (SI != PtrToStride.end()) {
-    Value *StrideVal = SI->second;
+  if (SI == PtrToStride.end())
+    // For a non-symbolic stride, just return the original expression.
+    return OrigSCEV;
 
-    // Strip casts.
-    StrideVal = stripIntegerCast(StrideVal);
+  Value *StrideVal = stripIntegerCast(SI->second);
 
-    ScalarEvolution *SE = PSE.getSE();
-    const auto *U = cast<SCEVUnknown>(SE->getSCEV(StrideVal));
-    const auto *CT =
-        static_cast<const SCEVConstant *>(SE->getOne(StrideVal->getType()));
+  ScalarEvolution *SE = PSE.getSE();
+  const auto *U = cast<SCEVUnknown>(SE->getSCEV(StrideVal));
+  const auto *CT =
+    static_cast<const SCEVConstant *>(SE->getOne(StrideVal->getType()));
 
-    PSE.addPredicate(*SE->getEqualPredicate(U, CT));
-    auto *Expr = PSE.getSCEV(Ptr);
+  PSE.addPredicate(*SE->getEqualPredicate(U, CT));
+  auto *Expr = PSE.getSCEV(Ptr);
 
-    LLVM_DEBUG(dbgs() << "LAA: Replacing SCEV: " << *OrigSCEV
-                      << " by: " << *Expr << "\n");
-    return Expr;
-  }
-
-  // Otherwise, just return the SCEV of the original pointer.
-  return OrigSCEV;
+  LLVM_DEBUG(dbgs() << "LAA: Replacing SCEV: " << *OrigSCEV
+	     << " by: " << *Expr << "\n");
+  return Expr;
 }
 
 RuntimeCheckingPtrGroup::RuntimeCheckingPtrGroup(
@@ -2150,12 +2146,8 @@ bool LoopAccessInfo::isUniform(Value *V) const {
 }
 
 void LoopAccessInfo::collectStridedAccess(Value *MemAccess) {
-  Value *Ptr = nullptr;
-  if (LoadInst *LI = dyn_cast<LoadInst>(MemAccess))
-    Ptr = LI->getPointerOperand();
-  else if (StoreInst *SI = dyn_cast<StoreInst>(MemAccess))
-    Ptr = SI->getPointerOperand();
-  else
+  Value *Ptr = getLoadStorePointerOperand(MemAccess);
+  if (!Ptr)
     return;
 
   Value *Stride = getStrideFromPointer(Ptr, PSE->getSE(), TheLoop);