llvm/test/TableGen/trydecode-emission.td
2016-03-11 17:27:38 +00:00

44 lines
1.4 KiB
TableGen

// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | FileCheck %s
// Check that if decoding of an instruction fails and the instruction does not
// have a complete decoder method that can determine if the bitpattern is valid
// or not then the decoder tries to find a more general instruction that
// matches the bitpattern too.
include "llvm/Target/Target.td"
def archInstrInfo : InstrInfo { }
def arch : Target {
let InstructionSet = archInstrInfo;
}
class TestInstruction : Instruction {
let Size = 1;
let OutOperandList = (outs);
let InOperandList = (ins);
field bits<8> Inst;
field bits<8> SoftFail = 0;
}
def InstA : TestInstruction {
let Inst = {0,0,0,0,?,?,?,?};
let AsmString = "InstA";
}
def InstB : TestInstruction {
let Inst = {0,0,0,0,0,0,?,?};
let AsmString = "InstB";
let DecoderMethod = "DecodeInstB";
let hasCompleteDecoder = 0;
}
// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValue, 0, 14, 0, // Skip to: 21
// CHECK-NEXT: /* 7 */ MCD::OPC_CheckField, 2, 2, 0, 5, 0, // Skip to: 18
// CHECK-NEXT: /* 13 */ MCD::OPC_TryDecode, 26, 0, 0, 0, // Opcode: InstB, skip to: 18
// CHECK-NEXT: /* 18 */ MCD::OPC_Decode, 25, 1, // Opcode: InstA
// CHECK-NEXT: /* 21 */ MCD::OPC_Fail,
// CHECK: if (DecodeInstB(MI, insn, Address, Decoder) == MCDisassembler::Fail) { DecodeComplete = false; return MCDisassembler::Fail; }