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Emit runtime type checks in legalizer.rs (#112)

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* Emit runtime type checks in legalizer.rs
This commit is contained in:
d1m0
2017-07-10 15:28:32 -07:00
committed by Jakob Stoklund Olesen
parent 528e6ff3f5
commit fc11ae7b72
9 changed files with 494 additions and 69 deletions
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31
lib/cretonne/meta/gen_instr.py
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@@ -336,6 +336,25 @@ def get_constraint(op, ctrl_typevar, type_sets):
return 'Same'
# TypeSet indexes are encoded in 8 bits, with `0xff` reserved.
typeset_limit = 0xff
def gen_typesets_table(fmt, type_sets):
# type: (srcgen.Formatter, UniqueTable) -> None
"""
Generate the table of ValueTypeSets described by type_sets.
"""
fmt.comment('Table of value type sets.')
assert len(type_sets.table) <= typeset_limit, "Too many type sets"
with fmt.indented(
'const TYPE_SETS : [ValueTypeSet; {}] = ['
.format(len(type_sets.table)), '];'):
for ts in type_sets.table:
with fmt.indented('ValueTypeSet {', '},'):
ts.emit_fields(fmt)
def gen_type_constraints(fmt, instrs):
# type: (srcgen.Formatter, Sequence[Instruction]) -> None
"""
@@ -360,9 +379,6 @@ def gen_type_constraints(fmt, instrs):
# Preload table with constraints for typical binops.
operand_seqs.add(['Same'] * 3)
# TypeSet indexes are encoded in 8 bits, with `0xff` reserved.
typeset_limit = 0xff
fmt.comment('Table of opcode constraints.')
with fmt.indented(
'const OPCODE_CONSTRAINTS : [OpcodeConstraints; {}] = ['
@@ -418,14 +434,7 @@ def gen_type_constraints(fmt, instrs):
fmt.line('typeset_offset: {},'.format(ctrl_typeset))
fmt.line('constraint_offset: {},'.format(offset))
fmt.comment('Table of value type sets.')
assert len(type_sets.table) <= typeset_limit, "Too many type sets"
with fmt.indented(
'const TYPE_SETS : [ValueTypeSet; {}] = ['
.format(len(type_sets.table)), '];'):
for ts in type_sets.table:
with fmt.indented('ValueTypeSet {', '},'):
ts.emit_fields(fmt)
gen_typesets_table(fmt, type_sets)
fmt.comment('Table of operand constraint sequences.')
with fmt.indented(