2a586a8118
It can never be reached. It could be reached if we emitted an opcode that could fall outside the outermost scope, but emission of all such opcodes is guarded by `!isOutermostScope()`. That also means we never add fixups to the outermost scope, so avoid pushing an entry for it onto the stack.
119 lines
3.4 KiB
TableGen
119 lines
3.4 KiB
TableGen
// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | \
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// RUN: FileCheck %s --check-prefix=DECODER
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// RUN: llvm-tblgen -gen-disassembler --suppress-per-hwmode-duplicates=O2 -I \
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// RUN: %p/../../include %s | FileCheck %s --check-prefix=DECODER-SUPPRESS
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// Test duplicate table suppression for per-HwMode decoders.
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include "llvm/Target/Target.td"
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def archInstrInfo : InstrInfo { }
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def arch : Target {
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let InstructionSet = archInstrInfo;
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}
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def Myi32 : Operand<i32> {
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let DecoderMethod = "DecodeMyi32";
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}
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def HasA : Predicate<"Subtarget->hasA()">;
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def HasB : Predicate<"Subtarget->hasB()">;
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def ModeA : HwMode<"+a", [HasA]>;
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def ModeB : HwMode<"+b", [HasB]>;
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def fooTypeEncA : InstructionEncoding {
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let Size = 4;
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field bits<32> SoftFail = 0;
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bits<32> Inst;
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bits<8> factor;
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let Inst{7...0} = factor;
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let Inst{3...2} = 0b11;
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let Inst{1...0} = 0b00;
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}
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def fooTypeEncB : InstructionEncoding {
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let Size = 4;
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field bits<32> SoftFail = 0;
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bits<32> Inst;
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bits<8> factor;
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let Inst{15...8} = factor;
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let Inst{1...0} = 0b11;
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}
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let OutOperandList = (outs) in {
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def foo : Instruction {
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let InOperandList = (ins i32imm:$factor);
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let EncodingInfos = EncodingByHwMode<
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[ModeA, ModeB], [fooTypeEncA, fooTypeEncB]
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>;
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let AsmString = "foo $factor";
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}
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// Encoding not overridden, same namespace:
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// In the default case, this instruction is duplicated into both ModeA and
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// ModeB decoder tables.
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// In the suppressed case, this instruction appears in a single decoder table.
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def bar: Instruction {
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let InOperandList = (ins i32imm:$factor);
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let Size = 4;
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bits<32> Inst;
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bits<32> SoftFail;
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bits<8> factor;
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let Inst{31...24} = factor;
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let Inst{1...0} = 0b10;
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let AsmString = "bar $factor";
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}
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def baz : Instruction {
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let InOperandList = (ins i32imm:$factor);
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bits<32> Inst;
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let EncodingInfos = EncodingByHwMode<
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[ModeB], [fooTypeEncA]
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>;
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let AsmString = "foo $factor";
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}
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// Encoding not overridden, different namespace:
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// In the default case, this instruction is duplicated into two Alt decoder
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// tables (ModeA and ModeB).
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// In the suppressed case, this instruction appears in a single decoder table.
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def unrelated: Instruction {
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let DecoderNamespace = "Alt";
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let InOperandList = (ins i32imm:$factor);
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let Size = 4;
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bits<32> Inst;
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bits<32> SoftFail;
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bits<8> factor;
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let Inst{31...24} = factor;
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let Inst{1...0} = 0b10;
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let AsmString = "unrelated $factor";
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}
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}
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// DECODER-LABEL: DecoderTable_ModeA32
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// DECODER-DAG: Opcode: fooTypeEncA:foo
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTable_ModeB32
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// DECODER-DAG: Opcode: fooTypeEncB:foo
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// DECODER-DAG: Opcode: fooTypeEncA:baz
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTableAlt_ModeA32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-LABEL: DecoderTableAlt_ModeB32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-SUPPRESS-LABEL: DecoderTable32
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// DECODER-SUPPRESS-DAG: Opcode: bar
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// DECODER-SUPPRESS-LABEL: DecoderTable_ModeA32
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// DECODER-SUPPRESS-DAG: Opcode: fooTypeEncA:foo
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// DECODER-SUPPRESS-NOT: Opcode: bar
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// DECODER-SUPPRESS-LABEL: DecoderTable_ModeB32
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// DECODER-SUPPRESS-DAG: Opcode: fooTypeEncB:foo
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// DECODER-SUPPRESS-DAG: Opcode: fooTypeEncA:baz
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// DECODER-SUPPRESS-NOT: Opcode: bar
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// DECODER-SUPPRESS-LABEL: DecoderTableAlt32
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// DECODER-SUPPRESS-DAG: Opcode: unrelated
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