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Allow for multiple legalization patterns for the same opcode.

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Each input pattern can have a predicate in addition to an opcode being
matched. When an opcode has multiple patterns, execute the first pattern
with a true predicate.

The predicates can be type checks or instruction predicates checking
immediate fields.
This commit is contained in:
Jakob Stoklund Olesen
2017-07-28 11:06:09 -07:00
parent b5076108c1
commit 1f02d1f880
2 changed files with 73 additions and 71 deletions
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32
lib/cretonne/meta/test_gen_legalizer.py
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@@ -49,39 +49,27 @@ def typeset_check(v, ts):
# type: (Var, TypeSet) -> CheckProducer
return lambda typesets: format_check(
typesets,
'if !TYPE_SETS[{}].contains(typeof_{}) ' +
'{{\n return false;\n}};\n', ts, v)
'let predicate = predicate && TYPE_SETS[{}].contains(typeof_{});\n',
ts, v)
def equiv_check(tv1, tv2):
# type: (TypeVar, TypeVar) -> CheckProducer
# type: (str, str) -> CheckProducer
return lambda typesets: format_check(
typesets,
'{{\n' +
' let a = {};\n' +
' let b = {};\n' +
' if a.is_none() || b.is_none() {{\n' +
' return false;\n' +
' }};\n' +
' if a != b {{\n' +
' return false;\n' +
' }};\n' +
'let predicate = predicate && match ({}, {}) {{\n'
' (Some(a), Some(b)) => a == b,\n'
' _ => false,\n'
'}};\n', tv1, tv2)
def wider_check(tv1, tv2):
# type: (TypeVar, TypeVar) -> CheckProducer
# type: (str, str) -> CheckProducer
return lambda typesets: format_check(
typesets,
'{{\n' +
' let a = {};\n' +
' let b = {};\n' +
' if a.is_none() || b.is_none() {{\n' +
' return false;\n' +
' }};\n' +
' if !a.wider_or_equal(b) {{\n' +
' return false;\n' +
' }};\n' +
'let predicate = predicate && match ({}, {}) {{\n'
' (Some(a), Some(b)) => a.wider_or_equal(b),\n'
' _ => false,\n'
'}};\n', tv1, tv2)