================
@@ -753,6 +755,221 @@ def ScopeOp : CIR_Op<"scope", [
];
}
+//===----------------------------------------------------------------------===//
+// SwitchOp
+//===----------------------------------------------------------------------===//
+
+def CaseOpKind_DT : I32EnumAttrCase<"Default", 1, "default">;
+def CaseOpKind_EQ : I32EnumAttrCase<"Equal", 2, "equal">;
+def CaseOpKind_AO : I32EnumAttrCase<"Anyof", 3, "anyof">;
+def CaseOpKind_RG : I32EnumAttrCase<"Range", 4, "range">;
+
+def CaseOpKind : I32EnumAttr<
+ "CaseOpKind",
+ "case kind",
+ [CaseOpKind_DT, CaseOpKind_EQ, CaseOpKind_AO, CaseOpKind_RG]> {
+ let cppNamespace = "::cir";
+}
+
+def CaseOp : CIR_Op<"case", [
+ DeclareOpInterfaceMethods<RegionBranchOpInterface>,
+ RecursivelySpeculatable, AutomaticAllocationScope]> {
+ let summary = "Case operation";
+ let description = [{
+ The `cir.case` operation represents a case within a C/C++ switch.
+ The `cir.case` operation must be in a `cir.switch` operation directly
+ or indirectly.
+
+ The `cir.case` have 4 kinds:
+ - `equal, <constant>`: equality of the second case operand against the
+ condition.
+ - `anyof, [constant-list]`: equals to any of the values in a subsequent
+ following list.
+ - `range, [lower-bound, upper-bound]`: the condition is within the closed
+ interval.
+ - `default`: any other value.
+
+ Each case region must be explicitly terminated.
+ }];
+
+ let arguments = (ins ArrayAttr:$value, CaseOpKind:$kind);
+ let regions = (region AnyRegion:$caseRegion);
+
+ let assemblyFormat = "`(` $kind `,` $value `)` $caseRegion attr-dict";
+
+ let skipDefaultBuilders = 1;
+ let builders = [
+ OpBuilder<(ins "mlir::ArrayAttr":$value,
+ "CaseOpKind":$kind,
+ "mlir::OpBuilder::InsertPoint &":$insertPoint)>
+ ];
+}
+
+def SwitchOp : CIR_Op<"switch",
+ [SameVariadicOperandSize,
+ DeclareOpInterfaceMethods<RegionBranchOpInterface>,
+ RecursivelySpeculatable, AutomaticAllocationScope, NoRegionArguments]> {
+ let summary = "Switch operation";
+ let description = [{
+ The `cir.switch` operation represents C/C++ switch functionality for
+ conditionally executing multiple regions of code. The operand to an switch
+ is an integral condition value.
+
+ The set of `cir.case` operations and their enclosing `cir.switch`
+ represents the semantics of a C/C++ switch statement. Users can use
+ `collectCases(llvm::SmallVector<CaseOp> &cases)` to collect the `cir.case`
+ operation in the `cir.switch` operation easily.
+
+ The `cir.case` operations doesn't have to be in the region of `cir.switch`
+ directly. However, when all the `cir.case` operations lives in the region
+ of `cir.switch` directly and there is no other operations except the ending
+ `cir.yield` operation in the region of `cir.switch` directly, we call the
+ `cir.switch` operation is in a simple form. Users can use
+ `bool isSimpleForm(llvm::SmallVector<CaseOp> &cases)` member function to
+ detect if the `cir.switch` operation is in a simple form. The simple form
+ makes analysis easier to handle the `cir.switch` operation
----------------
andykaylor wrote:
```suggestion
makes it easier for analyses to handle the `cir.switch` operation
```
https://github.com/llvm/llvm-project/pull/137106
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