[llvm] Match range check pattern with SExt (PR #118910)

[Matthias Braun via llvm-commits]

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@@ -695,14 +695,27 @@ Value *InstCombinerImpl::simplifyRangeCheck(ICmpInst *Cmp0, ICmpInst *Cmp1,
                                Cmp1->getPredicate());
 
   Value *Input = Cmp0->getOperand(0);
+  Value *Cmp1Op0 = Cmp1->getOperand(0);
+  Value *Cmp1Op1 = Cmp1->getOperand(1);
   Value *RangeEnd;
-  if (Cmp1->getOperand(0) == Input) {
+  if (Cmp1Op0 == Input) {
     // For the upper range compare we have: icmp x, n
-    RangeEnd = Cmp1->getOperand(1);
-  } else if (Cmp1->getOperand(1) == Input) {
+    RangeEnd = Cmp1Op1;
+  } else if (isa<SExtInst>(Cmp1Op0) &&
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MatzeB wrote:

ok

https://github.com/llvm/llvm-project/pull/118910