[InstCombine] Handle non-icmp

dtcxzyw · dtcxzyw · commit 6c08d527d57c · 2025-02-06T10:03:50.000+08:00
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -611,8 +611,10 @@ static Value *foldLogOpOfMaskedICmps(Value *LHS, Value *RHS, bool IsAnd,
       if (NewMask == *ConstB)
         return LHS;
       if (NewMask == *ConstD) {
-        if (IsLogical)
-          cast<ICmpInst>(RHS)->setSameSign(false);
+        if (IsLogical) {
+          if (auto *ICmp = dyn_cast<ICmpInst>(RHS))
+            ICmp->setSameSign(false);
+        }
         return RHS;
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -611,8 +611,10 @@ static Value foldLogOpOfMaskedICmps(Value LHS, Value *RHS, bool IsAnd,`
`611`	`611`	`if (NewMask == *ConstB)`
`612`	`612`	`return LHS;`
`613`	`613`	`if (NewMask == *ConstD) {`
`614`		`- if (IsLogical)`
`615`		`- cast<ICmpInst>(RHS)->setSameSign(false);`
	`614`	`+ if (IsLogical) {`
	`615`	`+ if (auto *ICmp = dyn_cast<ICmpInst>(RHS))`
	`616`	`+ ICmp->setSameSign(false);`
	`617`	`+ }`
`616`	`618`	`return RHS;`
`617`	`619`	`}`
`618`	`620`	`}`