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[NFC][TableGen] Print DecodeIdx for DecodeOps in DecoderEmitter #142963

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Merged
merged 1 commit into from
Jun 6, 2025
Merged

[NFC][TableGen] Print DecodeIdx for DecodeOps in DecoderEmitter #142963

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8 changes: 4 additions & 4 deletions llvm/test/TableGen/trydecode-emission.td
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Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,8 @@ def InstB : TestInstruction {
// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-NEXT: /* 5 */ MCD::OPC_CheckField, 2, 2, 0, 6, 0, // Skip to: 17
// CHECK-NEXT: /* 11 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, Skip to: 17
// CHECK-NEXT: /* 17 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-NEXT: /* 11 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 17
// CHECK-NEXT: /* 17 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA, DecodeIdx: {{[0-9]+}}
// CHECK-NEXT: /* 21 */ MCD::OPC_Fail,

// CHECK: if (!Check(S, DecodeInstB(MI, insn, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
Expand All @@ -50,8 +50,8 @@ def InstB : TestInstruction {
// CHECK-LARGE: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
// CHECK-LARGE-NEXT: /* 3 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-LARGE-NEXT: /* 5 */ MCD::OPC_CheckField, 2, 2, 0, 7, 0, 0, // Skip to: 19
// CHECK-LARGE-NEXT: /* 12 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, Skip to: 19
// CHECK-LARGE-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-LARGE-NEXT: /* 12 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 19
// CHECK-LARGE-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA, DecodeIdx: {{[0-9]+}}
// CHECK-LARGE-NEXT: /* 23 */ MCD::OPC_Fail,

// CHECK-LARGE: if (!Check(S, DecodeInstB(MI, insn, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
Expand Down
4 changes: 2 additions & 2 deletions llvm/test/TableGen/trydecode-emission2.td
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Expand Up @@ -36,7 +36,7 @@ def InstB : TestInstruction {
// CHECK-NEXT: /* 5 */ MCD::OPC_ExtractField, 5, 3, // Inst{7-5} ...
// CHECK-NEXT: /* 8 */ MCD::OPC_FilterValueOrFail, 0
// CHECK-NEXT: /* 10 */ MCD::OPC_CheckField, 0, 2, 3, 6, 0, // Skip to: 22
// CHECK-NEXT: /* 16 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, Skip to: 22
// CHECK-NEXT: /* 16 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 22
// CHECK-NEXT: /* 22 */ MCD::OPC_CheckFieldOrFail, 3, 2, 0,
// CHECK-NEXT: /* 26 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, {{[0-9]+}}, 1,
// CHECK-NEXT: /* 30 */ MCD::OPC_Fail,
Expand All @@ -49,7 +49,7 @@ def InstB : TestInstruction {
// CHECK-LARGE-NEXT: /* 5 */ MCD::OPC_ExtractField, 5, 3, // Inst{7-5} ...
// CHECK-LARGE-NEXT: /* 8 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-LARGE-NEXT: /* 10 */ MCD::OPC_CheckField, 0, 2, 3, 7, 0, 0, // Skip to: 24
// CHECK-LARGE-NEXT: /* 17 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, Skip to: 24
// CHECK-LARGE-NEXT: /* 17 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 24
// CHECK-LARGE-NEXT: /* 24 */ MCD::OPC_CheckFieldOrFail, 3, 2, 0,
// CHECK-LARGE-NEXT: /* 28 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, {{[0-9]+}}, 1,
// CHECK-LARGE-NEXT: /* 32 */ MCD::OPC_Fail,
Expand Down
6 changes: 3 additions & 3 deletions llvm/test/TableGen/trydecode-emission3.td
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ def InstB : TestInstruction {
// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-NEXT: /* 5 */ MCD::OPC_CheckField, 2, 2, 0, 6, 0, // Skip to: 17
// CHECK-NEXT: /* 11 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, Skip to: 17
// CHECK-NEXT: /* 11 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 17
// CHECK-NEXT: /* 17 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-NEXT: /* 21 */ MCD::OPC_Fail,

Expand All @@ -47,8 +47,8 @@ def InstB : TestInstruction {
// CHECK-LARGE: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
// CHECK-LARGE-NEXT: /* 3 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-LARGE-NEXT: /* 5 */ MCD::OPC_CheckField, 2, 2, 0, 7, 0, 0, // Skip to: 19
// CHECK-LARGE-NEXT: /* 12 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, Skip to: 19
// CHECK-LARGE-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-LARGE-NEXT: /* 12 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 19
// CHECK-LARGE-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA, DecodeIdx: {{[0-9]+}}
// CHECK-LARGE-NEXT: /* 23 */ MCD::OPC_Fail,

// CHECK-LARGE: if (!Check(S, DecodeInstBOp(MI, tmp, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
8 changes: 4 additions & 4 deletions llvm/test/TableGen/trydecode-emission4.td
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Expand Up @@ -36,8 +36,8 @@ def InstB : TestInstruction {
// CHECK: /* 0 */ MCD::OPC_ExtractField, 250, 3, 4, // Inst{509-506} ...
// CHECK-NEXT: /* 4 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-NEXT: /* 6 */ MCD::OPC_CheckField, 248, 3, 2, 0, 6, 0, // Skip to: 19
// CHECK-NEXT: /* 13 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, Skip to: 19
// CHECK-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-NEXT: /* 13 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 19
// CHECK-NEXT: /* 19 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA, DecodeIdx: {{[0-9]+}}
// CHECK-NEXT: /* 23 */ MCD::OPC_Fail,

// CHECK: if (!Check(S, DecodeInstB(MI, insn, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
Expand All @@ -46,8 +46,8 @@ def InstB : TestInstruction {
// CHECK-LARGE: /* 0 */ MCD::OPC_ExtractField, 250, 3, 4, // Inst{509-506} ...
// CHECK-LARGE-NEXT: /* 4 */ MCD::OPC_FilterValueOrFail, 0,
// CHECK-LARGE-NEXT: /* 6 */ MCD::OPC_CheckField, 248, 3, 2, 0, 7, 0, 0, // Skip to: 21
// CHECK-LARGE-NEXT: /* 14 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, Skip to: 21
// CHECK-LARGE-NEXT: /* 21 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA
// CHECK-LARGE-NEXT: /* 14 */ MCD::OPC_TryDecode, {{[0-9]+}}, {{[0-9]+}}, 0, 0, 0, 0, // Opcode: InstB, DecodeIdx: {{[0-9]+}}, Skip to: 21
// CHECK-LARGE-NEXT: /* 21 */ MCD::OPC_Decode, {{[0-9]+}}, {{[0-9]+}}, 1, // Opcode: InstA, DecodeIdx: {{[0-9]+}}
// CHECK-LARGE-NEXT: /* 25 */ MCD::OPC_Fail,

// CHECK-LARGE: if (!Check(S, DecodeInstB(MI, insn, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
Expand Down
14 changes: 8 additions & 6 deletions llvm/utils/TableGen/DecoderEmitter.cpp
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Expand Up @@ -975,25 +975,26 @@ void DecoderEmitter::emitTable(formatted_raw_ostream &OS, DecoderTable &Table,
emitULEB128(I, OS);

// Decoder index.
unsigned DecodeIdx = decodeULEB128(&*I, nullptr, EndPtr, &ErrMsg);
assert(ErrMsg == nullptr && "ULEB128 value too large!");
emitULEB128(I, OS);

auto EncI = OpcodeToEncodingID.find(Opc);
assert(EncI != OpcodeToEncodingID.end() && "no encoding entry");
auto EncodingID = EncI->second;

if (!IsTry) {
OS << "// Opcode: " << NumberedEncodings[EncodingID] << "\n";
OS << "// Opcode: " << NumberedEncodings[EncodingID]
<< ", DecodeIdx: " << DecodeIdx << '\n';
break;
}

// Fallthrough for OPC_TryDecode.

if (!IsFail) {
uint32_t NumToSkip = emitNumToSkip(I, OS);
OS << "// Opcode: " << NumberedEncodings[EncodingID];
OS << "// Opcode: " << NumberedEncodings[EncodingID]
<< ", DecodeIdx: " << DecodeIdx;
emitNumToSkipComment(NumToSkip, /*InComment=*/true);
} else {
OS << "// Opcode: " << NumberedEncodings[EncodingID];
}
OS << '\n';
break;
Expand Down Expand Up @@ -2249,7 +2250,8 @@ static DecodeStatus decodeInstruction(const uint8_t DecodeTable[], MCInst &MI,
const uint8_t DecoderOp = *Ptr++;
switch (DecoderOp) {
default:
errs() << Loc << ": Unexpected decode table opcode!\n";
errs() << Loc << ": Unexpected decode table opcode: "
<< (int)DecoderOp << '\n';
return MCDisassembler::Fail;
case MCD::OPC_ExtractField: {
// Decode the start value.
Expand Down