[clang] [CIR] Add Pure trait to IsFPClassOp (PR #186625)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Henrich Lauko (xlauko)

<details>
<summary>Changes</summary>

IsFPClassOp is a pure classification check on a floating-point value
with no memory effects. 

---
Full diff: https://github.com/llvm/llvm-project/pull/186625.diff


1 Files Affected:

- (modified) clang/include/clang/CIR/Dialect/IR/CIROps.td (+1-1) 


``````````diff
diff --git a/clang/include/clang/CIR/Dialect/IR/CIROps.td b/clang/include/clang/CIR/Dialect/IR/CIROps.td
index d9c4356ba95b9..9b04d4aa4773f 100644
--- a/clang/include/clang/CIR/Dialect/IR/CIROps.td
+++ b/clang/include/clang/CIR/Dialect/IR/CIROps.td
@@ -5624,7 +5624,7 @@ def FPClassTestEnum : CIR_I32EnumAttr<"FPClassTest", "floating-point class test
   let cppNamespace = "::cir";
 }
 
-def CIR_IsFPClassOp : CIR_Op<"is_fp_class"> {
+def CIR_IsFPClassOp : CIR_Op<"is_fp_class", [Pure]> {
   let summary = "Corresponding to the `__builtin_fpclassify` builtin function in clang";
 
   let description = [{

``````````

</details>


https://github.com/llvm/llvm-project/pull/186625