[InstComine] Use getNonEmpty to handle edge case

brandonxin · dtcxzyw · web-flow · commit af64a82a130b · 2025-10-01T11:14:38.000-05:00
Co-authored-by: Yingwei Zheng &lt;dtcxzyw@qq.com&gt;
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -5804,7 +5804,7 @@ Instruction *InstCombinerImpl::foldICmpWithClamp(ICmpInst &I, Value *X,
       return nullptr;
   }
 
-  ConstantRange CR(*Lo, *Hi + 1);
+  ConstantRange CR = ConstantRange::getNonEmpty(*Lo, *Hi + 1);
   ICmpInst::Predicate Pred;
   APInt C, Offset;
   if (I.getPredicate() == ICmpInst::ICMP_EQ)

Original file line number	Diff line number	Diff line change
`@@ -5804,7 +5804,7 @@ Instruction InstCombinerImpl::foldICmpWithClamp(ICmpInst &I, Value X,`
`5804`	`5804`	`return nullptr;`
`5805`	`5805`	`}`
`5806`	`5806`
`5807`		`- ConstantRange CR(Lo, Hi + 1);`
	`5807`	`+ ConstantRange CR = ConstantRange::getNonEmpty(Lo, Hi + 1);`
`5808`	`5808`	`ICmpInst::Predicate Pred;`
`5809`	`5809`	`APInt C, Offset;`
`5810`	`5810`	`if (I.getPredicate() == ICmpInst::ICMP_EQ)`