[Mlir-commits] [mlir] [MLIR][LLVM] Add `llvm.experimental.constrained.fptrunc` operation (PR #86260)

[Tobias Gysi]

================
@@ -311,6 +311,47 @@ def LLVM_InvariantEndOp : LLVM_ZeroResultIntrOp<"invariant.end", [2],
       "qualified(type($ptr))";
 }
 
+// Constrained Floating-Point Intrinsics
+
+class LLVM_ConstrainedIntr<string mnem, int numArgs, bit hasRoundingMode>
+    : LLVM_OneResultIntrOp<"experimental.constrained." # mnem,
+                           /*overloadedResults=*/[0],
+                           /*overloadedOperands=*/[0],
+                           /*traits=*/[Pure, DeclareOpInterfaceMethods<ExceptionBehaviorOpInterface>]
+                           # !cond(
+                               !gt(hasRoundingMode, 0) : [DeclareOpInterfaceMethods<RoundingModeOpInterface>],
+                               true : []),
+                           /*requiresFastmath=*/0,
+                           /*immArgPositions=*/[],
+                           /*immArgAttrNames=*/[]> {
+  dag regularArgs = !dag(ins, !listsplat(LLVM_Type, numArgs), !foreach(i, !range(numArgs), "arg_" #i));
+  dag attrArgs = !con(!cond(!gt(hasRoundingMode, 0) : (ins ValidRoundingModeAttr:$roundingmode),
----------------
gysit wrote:

```suggestion
  dag attrArgs = !con(!cond(!gt(hasRoundingMode, 0) : (ins ValidRoundingModeAttr:$roundingMode),
```
With the suggested interface change it may be possible to use snake case? 

https://github.com/llvm/llvm-project/pull/86260