[SCEV] Remove zext/sext from BuildConstantForSCEV

In preparation for removing these constant expressions.
llvm · Sep 28, 2023 · c887700 · c887700
1 parent 6dd8ec6
commit c887700
Showing 1 changed file with 3 additions and 13 deletions.
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp
@@ -9666,18 +9666,6 @@ static Constant *BuildConstantFromSCEV(const SCEV *V) {
     return cast<SCEVConstant>(V)->getValue();
   case scUnknown:
     return dyn_cast<Constant>(cast<SCEVUnknown>(V)->getValue());
-  case scSignExtend: {
-    const SCEVSignExtendExpr *SS = cast<SCEVSignExtendExpr>(V);
-    if (Constant *CastOp = BuildConstantFromSCEV(SS->getOperand()))
-      return ConstantExpr::getSExt(CastOp, SS->getType());
-    return nullptr;
-  }
-  case scZeroExtend: {
-    const SCEVZeroExtendExpr *SZ = cast<SCEVZeroExtendExpr>(V);
-    if (Constant *CastOp = BuildConstantFromSCEV(SZ->getOperand()))
-      return ConstantExpr::getZExt(CastOp, SZ->getType());
-    return nullptr;
-  }
   case scPtrToInt: {
     const SCEVPtrToIntExpr *P2I = cast<SCEVPtrToIntExpr>(V);
     if (Constant *CastOp = BuildConstantFromSCEV(P2I->getOperand()))
@@ -9727,13 +9715,15 @@ static Constant *BuildConstantFromSCEV(const SCEV *V) {
     }
     return C;
   }
+  case scSignExtend:
+  case scZeroExtend:
   case scUDivExpr:
   case scSMaxExpr:
   case scUMaxExpr:
   case scSMinExpr:
   case scUMinExpr:
   case scSequentialUMinExpr:
-    return nullptr; // TODO: smax, umax, smin, umax, umin_seq.
+    return nullptr;
   }
   llvm_unreachable("Unknown SCEV kind!");
 }