[llvm-branch-commits] [llvm] [DA] Check nsw when extracting a constant operand of SCEVMul (PR #164408)

[Ryotaro Kasuga via llvm-branch-commits]

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@@ -2828,8 +2828,9 @@ static std::optional<APInt> getConstantPart(const SCEV *Expr) {
   if (const auto *Constant = dyn_cast<SCEVConstant>(Expr))
     return Constant->getAPInt();
   if (const auto *Product = dyn_cast<SCEVMulExpr>(Expr))
-    if (const auto *Constant = dyn_cast<SCEVConstant>(Product->getOperand(0)))
-      return Constant->getAPInt();
+    if (Product->hasNoSignedWrap())
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kasuga-fj wrote:

Thanks, renamed

https://github.com/llvm/llvm-project/pull/164408