llvm/llvm/test/TableGen/GlobalISelCombinerEmitter/match-table-imms.td

// RUN: llvm-tblgen -I %p/../../../include -gen-global-isel-combiner \
// RUN:     -combiners=MyCombiner %s | \
// RUN: FileCheck %s

include "llvm/Target/Target.td"
include "llvm/Target/GlobalISel/Combine.td"

def MyTargetISA : InstrInfo;
def MyTarget : Target { let InstructionSet = MyTargetISA; }

// emits a imm
def InstTest0 : GICombineRule<
  (defs root:$a),
  (match (COPY $a, (i32 0))),
  (apply (COPY $a, 0))>;

// implicitly emits a G_CONSTANT
def InstTest1 : GICombineRule<
  (defs root:$a),
  (match (G_ZEXT $a, 0)),
  (apply (COPY $a, (i32 0)))>;

// emits a CImm because G_CONSTANT is a special case.
def CImmInstTest1 : GICombineRule<
  (defs root:$a),
  (match (G_CONSTANT $a, (i32 0))),
  (apply (G_CONSTANT $a, (i32 42)))>;

def MyCombiner: GICombiner<"GenMyCombiner", [
  InstTest0,
  InstTest1,
  CImmInstTest1
]>;

//      CHECK: const uint8_t *GenMyCombiner::getMatchTable() const {
// CHECK-NEXT:   constexpr static uint8_t MatchTable0[] = {
// CHECK-NEXT:     GIM_SwitchOpcode, /*MI*/0, /*[*/GIMT_Encode2(20), GIMT_Encode2({{[0-9]+}}), /*)*//*default:*//*Label 3*/ GIMT_Encode4([[L579:[0-9]+]]),
// CHECK-NEXT:     /*TargetOpcode::COPY*//*Label 0*/ GIMT_Encode4([[L462:[0-9]+]]), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0),
// CHECK-NEXT:     /*TargetOpcode::G_CONSTANT*//*Label 1*/ GIMT_Encode4([[L493:[0-9]+]]), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0), GIMT_Encode4(0),
// CHECK-NEXT:     /*TargetOpcode::G_ZEXT*//*Label 2*/ GIMT_Encode4({{[0-9]+}}),
// CHECK-NEXT:     // Label 0: @[[L462]]
// CHECK-NEXT:     GIM_Try, /*On fail goto*//*Label 4*/ GIMT_Encode4([[L492:[0-9]+]]), // Rule ID 0 //
// CHECK-NEXT:       GIM_CheckSimplePredicate, GIMT_Encode2(GICXXPred_Simple_IsRule0Enabled),
// CHECK-NEXT:       GIM_RootCheckType, /*Op*/1, /*Type*/GILLT_s32,
// CHECK-NEXT:       // MIs[0] a
// CHECK-NEXT:       // No operand predicates
// CHECK-NEXT:       GIM_CheckConstantInt8, /*MI*/0, /*Op*/1, 0,
// CHECK-NEXT:       // Combiner Rule #0: InstTest0
// CHECK-NEXT:       GIR_BuildRootMI, /*Opcode*/GIMT_Encode2(TargetOpcode::COPY),
// CHECK-NEXT:       GIR_RootToRootCopy, /*OpIdx*/0, // a
// CHECK-NEXT:       GIR_AddImm8, /*InsnID*/0, /*Imm*/0,
// CHECK-NEXT:       GIR_EraseRootFromParent_Done,
// CHECK-NEXT:     // Label 4: @[[L492]]
// CHECK-NEXT:     GIM_Reject,
// CHECK-NEXT:     // Label 1: @[[L493]]
// CHECK-NEXT:     GIM_Try, /*On fail goto*//*Label 5*/ GIMT_Encode4([[L538:[0-9]+]]), // Rule ID 2 //
// CHECK-NEXT:       GIM_CheckSimplePredicate, GIMT_Encode2(GICXXPred_Simple_IsRule2Enabled),
// CHECK-NEXT:       GIM_RootCheckType, /*Op*/1, /*Type*/GILLT_s32,
// CHECK-NEXT:       // MIs[0] a
// CHECK-NEXT:       // No operand predicates
// CHECK-NEXT:       GIM_CheckLiteralInt, /*MI*/0, /*Op*/1, GIMT_Encode8(0),
// CHECK-NEXT:       // Combiner Rule #2: CImmInstTest1
// CHECK-NEXT:       GIR_BuildRootMI, /*Opcode*/GIMT_Encode2(TargetOpcode::G_CONSTANT),
// CHECK-NEXT:       GIR_RootToRootCopy, /*OpIdx*/0, // a
// CHECK-NEXT:       GIR_AddCImm, /*InsnID*/0, /*Type*/GILLT_s32, /*Imm*/GIMT_Encode8(42),
// CHECK-NEXT:       GIR_EraseRootFromParent_Done,
// CHECK-NEXT:     // Label 5: @[[L538]]
// CHECK-NEXT:     GIM_Reject,
// CHECK-NEXT:     // Label 2: @{{[0-9]+}}
// CHECK-NEXT:     GIM_Try, /*On fail goto*//*Label 6*/ GIMT_Encode4([[L578:[0-9]+]]), // Rule ID 1 //
// CHECK-NEXT:       GIM_CheckSimplePredicate, GIMT_Encode2(GICXXPred_Simple_IsRule1Enabled),
// CHECK-NEXT:       // MIs[0] a
// CHECK-NEXT:       // No operand predicates
// CHECK-NEXT:       // MIs[0] Operand 1
// CHECK-NEXT:       GIM_CheckConstantInt8, /*MI*/0, /*Op*/1, 0,
// CHECK-NEXT:       GIR_MakeTempReg, /*TempRegID*/0, /*TypeID*/GILLT_s32,
// CHECK-NEXT:       GIR_BuildConstant, /*TempRegID*/0, /*Val*/GIMT_Encode8(0),
// CHECK-NEXT:       // Combiner Rule #1: InstTest1
// CHECK-NEXT:       GIR_BuildRootMI, /*Opcode*/GIMT_Encode2(TargetOpcode::COPY),
// CHECK-NEXT:       GIR_RootToRootCopy, /*OpIdx*/0, // a
// CHECK-NEXT:       GIR_AddSimpleTempRegister, /*InsnID*/0, /*TempRegID*/0,
// CHECK-NEXT:       GIR_EraseRootFromParent_Done,
// CHECK-NEXT:     // Label 6: @[[L578]]
// CHECK-NEXT:     GIM_Reject,
// CHECK-NEXT:     // Label 3: @[[L579]]
// CHECK-NEXT:     GIM_Reject,
// CHECK-NEXT:     }; // Size: {{[0-9]+}} bytes
// CHECK-NEXT:   return MatchTable0;
// CHECK-NEXT: }