[llvm] 6dd8ec6 - [SCEV] Work on APInt instead of ConstantExpr (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2023-09-28T15:23:58+02:00
New Revision: 6dd8ec64653ab414cb12ad62924e521f87e5cd52

URL: https://github.com/llvm/llvm-project/commit/6dd8ec64653ab414cb12ad62924e521f87e5cd52
DIFF: https://github.com/llvm/llvm-project/commit/6dd8ec64653ab414cb12ad62924e521f87e5cd52.diff

LOG: [SCEV] Work on APInt instead of ConstantExpr (NFC)

Avoid an unnecessary use of ConstantExpr::getZExt() when
APInt::zext() is sufficient.

Added: 
    

Modified: 
    llvm/lib/Analysis/ScalarEvolution.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
index 4e5157970dc0719..9ffffcc018cb577 100644
--- a/llvm/lib/Analysis/ScalarEvolution.cpp
+++ b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -1571,8 +1571,7 @@ const SCEV *ScalarEvolution::getZeroExtendExprImpl(const SCEV *Op, Type *Ty,
 
   // Fold if the operand is constant.
   if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op))
-    return getConstant(
-      cast<ConstantInt>(ConstantExpr::getZExt(SC->getValue(), Ty)));
+    return getConstant(SC->getAPInt().zext(getTypeSizeInBits(Ty)));
 
   // zext(zext(x)) --> zext(x)
   if (const SCEVZeroExtendExpr *SZ = dyn_cast<SCEVZeroExtendExpr>(Op))
@@ -1908,8 +1907,7 @@ const SCEV *ScalarEvolution::getSignExtendExprImpl(const SCEV *Op, Type *Ty,
 
   // Fold if the operand is constant.
   if (const SCEVConstant *SC = dyn_cast<SCEVConstant>(Op))
-    return getConstant(
-      cast<ConstantInt>(ConstantExpr::getSExt(SC->getValue(), Ty)));
+    return getConstant(SC->getAPInt().sext(getTypeSizeInBits(Ty)));
 
   // sext(sext(x)) --> sext(x)
   if (const SCEVSignExtendExpr *SS = dyn_cast<SCEVSignExtendExpr>(Op))