Skip to content

Riscv

riscv

RemoveRedundantMv

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
25
26
27
28
29
class RemoveRedundantMv(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.MVOp, rewriter: PatternRewriter) -> None:
        if op.rd.type == op.rs.type and op.rd.type.is_allocated:
            rewriter.replace(op, [], [op.rs])

match_and_rewrite(op: riscv.MVOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
26
27
28
29
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.MVOp, rewriter: PatternRewriter) -> None:
    if op.rd.type == op.rs.type and op.rd.type.is_allocated:
        rewriter.replace(op, [], [op.rs])

RemoveRedundantFMv

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
32
33
34
35
36
class RemoveRedundantFMv(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FMVOp, rewriter: PatternRewriter) -> None:
        if op.rd.type == op.rs.type and op.rd.type.is_allocated:
            rewriter.replace(op, [], [op.rs])

match_and_rewrite(op: riscv.FMVOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
33
34
35
36
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FMVOp, rewriter: PatternRewriter) -> None:
    if op.rd.type == op.rs.type and op.rd.type.is_allocated:
        rewriter.replace(op, [], [op.rs])

RemoveRedundantFMvD

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
39
40
41
42
43
class RemoveRedundantFMvD(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FMvDOp, rewriter: PatternRewriter) -> None:
        if op.rd.type == op.rs.type and op.rd.type.is_allocated:
            rewriter.replace(op, [], [op.rs])

match_and_rewrite(op: riscv.FMvDOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
40
41
42
43
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FMvDOp, rewriter: PatternRewriter) -> None:
    if op.rd.type == op.rs.type and op.rd.type.is_allocated:
        rewriter.replace(op, [], [op.rs])

MultiplyImmediates

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
class MultiplyImmediates(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.MulOp, rewriter: PatternRewriter) -> None:
        lhs: int | None = None
        rhs: int | None = None
        if (rs1 := get_constant_value(op.rs1)) is not None:
            lhs = rs1.value.data

        if (rs2 := get_constant_value(op.rs2)) is not None:
            rhs = rs2.value.data

        rd = op.rd.type

        match (lhs, rhs):
            case int(), None:
                rewriter.replace(
                    op,
                    riscv.MulOp(
                        op.rs2,
                        op.rs1,
                        rd=rd,
                    ),
                )
            case None, int():
                if rhs == 0:
                    rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))
                    return
                elif rhs == 1:
                    rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))
                    return
                else:
                    return
            case int(), int():
                rewriter.replace(op, rv32.LiOp(lhs * rhs, rd=rd))
            case _:
                return

match_and_rewrite(op: riscv.MulOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.MulOp, rewriter: PatternRewriter) -> None:
    lhs: int | None = None
    rhs: int | None = None
    if (rs1 := get_constant_value(op.rs1)) is not None:
        lhs = rs1.value.data

    if (rs2 := get_constant_value(op.rs2)) is not None:
        rhs = rs2.value.data

    rd = op.rd.type

    match (lhs, rhs):
        case int(), None:
            rewriter.replace(
                op,
                riscv.MulOp(
                    op.rs2,
                    op.rs1,
                    rd=rd,
                ),
            )
        case None, int():
            if rhs == 0:
                rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))
                return
            elif rhs == 1:
                rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))
                return
            else:
                return
        case int(), int():
            rewriter.replace(op, rv32.LiOp(lhs * rhs, rd=rd))
        case _:
            return

DivideByOneIdentity

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
84
85
86
87
88
89
90
91
92
93
94
95
96
97
class DivideByOneIdentity(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.DivOp, rewriter: PatternRewriter) -> None:
        # Check if rs2 is a constant 1
        if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 1:
            rd_type = op.rd.type

            # Replace the DivOp with a copy/move of rs1 to rd
            move_op = riscv.MVOp(
                op.rs1,
                rd=rd_type,
            )

            rewriter.replace(op, [move_op])

match_and_rewrite(op: riscv.DivOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
85
86
87
88
89
90
91
92
93
94
95
96
97
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.DivOp, rewriter: PatternRewriter) -> None:
    # Check if rs2 is a constant 1
    if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 1:
        rd_type = op.rd.type

        # Replace the DivOp with a copy/move of rs1 to rd
        move_op = riscv.MVOp(
            op.rs1,
            rd=rd_type,
        )

        rewriter.replace(op, [move_op])

AddImmediates

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
class AddImmediates(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AddOp, rewriter: PatternRewriter) -> None:
        lhs: int | None = None
        rhs: int | None = None
        if (rs1 := get_constant_value(op.rs1)) is not None:
            lhs = rs1.value.data

        if (rs2 := get_constant_value(op.rs2)) is not None:
            rhs = rs2.value.data

        rd = op.rd.type

        match (lhs, rhs):
            case int(), None:
                rewriter.replace(
                    op,
                    riscv.AddiOp(
                        op.rs2,
                        lhs,
                        rd=rd,
                        comment=op.comment,
                    ),
                )
            case None, int():
                rewriter.replace(
                    op,
                    riscv.AddiOp(
                        op.rs1,
                        rhs,
                        rd=rd,
                        comment=op.comment,
                    ),
                )
            case int(), int():
                rewriter.replace(op, rv32.LiOp(lhs + rhs, rd=rd, comment=op.comment))
            case _:
                pass

match_and_rewrite(op: riscv.AddOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AddOp, rewriter: PatternRewriter) -> None:
    lhs: int | None = None
    rhs: int | None = None
    if (rs1 := get_constant_value(op.rs1)) is not None:
        lhs = rs1.value.data

    if (rs2 := get_constant_value(op.rs2)) is not None:
        rhs = rs2.value.data

    rd = op.rd.type

    match (lhs, rhs):
        case int(), None:
            rewriter.replace(
                op,
                riscv.AddiOp(
                    op.rs2,
                    lhs,
                    rd=rd,
                    comment=op.comment,
                ),
            )
        case None, int():
            rewriter.replace(
                op,
                riscv.AddiOp(
                    op.rs1,
                    rhs,
                    rd=rd,
                    comment=op.comment,
                ),
            )
        case int(), int():
            rewriter.replace(op, rv32.LiOp(lhs + rhs, rd=rd, comment=op.comment))
        case _:
            pass

AddImmediateZero

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
140
141
142
143
144
145
class AddImmediateZero(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AddiOp, rewriter: PatternRewriter) -> None:
        if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

match_and_rewrite(op: riscv.AddiOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
141
142
143
144
145
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AddiOp, rewriter: PatternRewriter) -> None:
    if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

AddImmediateConstant

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
class AddImmediateConstant(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AddiOp, rewriter: PatternRewriter) -> None:
        if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
            op.immediate, IntegerAttr
        ):
            rd = op.rd.type
            rewriter.replace(
                op,
                rv32.LiOp(
                    rs1.value.data + op.immediate.value.data,
                    rd=rd,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.AddiOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
149
150
151
152
153
154
155
156
157
158
159
160
161
162
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AddiOp, rewriter: PatternRewriter) -> None:
    if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
        op.immediate, IntegerAttr
    ):
        rd = op.rd.type
        rewriter.replace(
            op,
            rv32.LiOp(
                rs1.value.data + op.immediate.value.data,
                rd=rd,
                comment=op.comment,
            ),
        )

SubImmediates

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
class SubImmediates(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter) -> None:
        lhs: int | None = None
        rhs: int | None = None
        if (rs1 := get_constant_value(op.rs1)) is not None:
            lhs = rs1.value.data

        if (rs2 := get_constant_value(op.rs2)) is not None:
            rhs = rs2.value.data

        rd = op.rd.type

        match (lhs, rhs):
            case int(), None:
                # TODO: anything to do here?
                return
            case None, int():
                rewriter.replace(
                    op,
                    riscv.AddiOp(
                        op.rs1,
                        -rhs,
                        rd=rd,
                        comment=op.comment,
                    ),
                )
            case int(), int():
                rewriter.replace(op, rv32.LiOp(lhs - rhs, rd=rd, comment=op.comment))
            case _:
                pass

match_and_rewrite(op: riscv.SubOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter) -> None:
    lhs: int | None = None
    rhs: int | None = None
    if (rs1 := get_constant_value(op.rs1)) is not None:
        lhs = rs1.value.data

    if (rs2 := get_constant_value(op.rs2)) is not None:
        rhs = rs2.value.data

    rd = op.rd.type

    match (lhs, rhs):
        case int(), None:
            # TODO: anything to do here?
            return
        case None, int():
            rewriter.replace(
                op,
                riscv.AddiOp(
                    op.rs1,
                    -rhs,
                    rd=rd,
                    comment=op.comment,
                ),
            )
        case int(), int():
            rewriter.replace(op, rv32.LiOp(lhs - rhs, rd=rd, comment=op.comment))
        case _:
            pass

SubBySelf

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
class SubBySelf(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter):
        """
        x - x = 0
        """
        if op.rs1 == op.rs2:
            rd = op.rd.type
            rewriter.replace(
                op,
                (
                    zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                    riscv.MVOp(zero.res, rd=rd, comment=op.comment),
                ),
            )

match_and_rewrite(op: riscv.SubOp, rewriter: PatternRewriter)

x - x = 0

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
199
200
201
202
203
204
205
206
207
208
209
210
211
212
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter):
    """
    x - x = 0
    """
    if op.rs1 == op.rs2:
        rd = op.rd.type
        rewriter.replace(
            op,
            (
                zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                riscv.MVOp(zero.res, rd=rd, comment=op.comment),
            ),
        )

SubAddi

Bases: RewritePattern

(a + 4) - a -> 4

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
class SubAddi(RewritePattern):
    """
    (a + 4) - a -> 4
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
            and op.rs2 == op.rs1.op.rs1
        ):
            rd = op.rd.type
            rewriter.replace(op, rv32.LiOp(op.rs1.op.immediate.value.data, rd=rd))

match_and_rewrite(op: riscv.SubOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
220
221
222
223
224
225
226
227
228
229
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.SubOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
        and op.rs2 == op.rs1.op.rs1
    ):
        rd = op.rd.type
        rewriter.replace(op, rv32.LiOp(op.rs1.op.immediate.value.data, rd=rd))

AndiImmediate

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
232
233
234
235
236
237
238
239
240
241
class AndiImmediate(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AndiOp, rewriter: PatternRewriter) -> None:
        if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
            op.immediate, IntegerAttr
        ):
            rd = op.rd.type
            rewriter.replace(
                op, rv32.LiOp(rs1.value.data & op.immediate.value.data, rd=rd)
            )

match_and_rewrite(op: riscv.AndiOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
233
234
235
236
237
238
239
240
241
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AndiOp, rewriter: PatternRewriter) -> None:
    if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
        op.immediate, IntegerAttr
    ):
        rd = op.rd.type
        rewriter.replace(
            op, rv32.LiOp(rs1.value.data & op.immediate.value.data, rd=rd)
        )

AndiZero

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
244
245
246
247
248
249
class AndiZero(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AndiOp, rewriter: PatternRewriter) -> None:
        if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
            rd = op.rd.type
            rewriter.replace(op, rv32.LiOp(0, rd=rd))

match_and_rewrite(op: riscv.AndiOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
245
246
247
248
249
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AndiOp, rewriter: PatternRewriter) -> None:
    if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
        rd = op.rd.type
        rewriter.replace(op, rv32.LiOp(0, rd=rd))

OriImmediate

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
252
253
254
255
256
257
258
259
260
261
class OriImmediate(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.OriOp, rewriter: PatternRewriter) -> None:
        if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
            op.immediate, IntegerAttr
        ):
            rd = op.rd.type
            rewriter.replace(
                op, rv32.LiOp(rs1.value.data | op.immediate.value.data, rd=rd)
            )

match_and_rewrite(op: riscv.OriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
253
254
255
256
257
258
259
260
261
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.OriOp, rewriter: PatternRewriter) -> None:
    if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
        op.immediate, IntegerAttr
    ):
        rd = op.rd.type
        rewriter.replace(
            op, rv32.LiOp(rs1.value.data | op.immediate.value.data, rd=rd)
        )

OriImmediateZero

Bases: RewritePattern

x | 0 -> x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
264
265
266
267
268
269
270
271
272
class OriImmediateZero(RewritePattern):
    """
    x | 0 -> x
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.OriOp, rewriter: PatternRewriter) -> None:
        if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

match_and_rewrite(op: riscv.OriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
269
270
271
272
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.OriOp, rewriter: PatternRewriter) -> None:
    if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

XoriZero

Bases: RewritePattern

xor(x, 0) -> mv x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
275
276
277
278
279
280
281
282
283
class XoriZero(RewritePattern):
    """
    xor(x, 0) -> mv x
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
        if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

match_and_rewrite(op: riscv.XoriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
280
281
282
283
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
    if isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0:
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

XoriSelfInverse

Bases: RewritePattern

(x ^ a) ^ a -> x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
class XoriSelfInverse(RewritePattern):
    """
    (x ^ a) ^ a -> x
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.XoriOp)
            and isinstance(op.immediate, IntegerAttr)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
            and op.immediate.value.data == op.rs1.op.immediate.value.data
        ):
            rd = op.rd.type
            can_erase = op.rs1.op.rd.has_one_use()
            rewriter.replace(op, riscv.MVOp(op.rs1.op.rs1, rd=rd))
            if can_erase:
                rewriter.erase(op.rs1.op)

match_and_rewrite(op: riscv.XoriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
291
292
293
294
295
296
297
298
299
300
301
302
303
304
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.XoriOp)
        and isinstance(op.immediate, IntegerAttr)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
        and op.immediate.value.data == op.rs1.op.immediate.value.data
    ):
        rd = op.rd.type
        can_erase = op.rs1.op.rd.has_one_use()
        rewriter.replace(op, riscv.MVOp(op.rs1.op.rs1, rd=rd))
        if can_erase:
            rewriter.erase(op.rs1.op)

XoriOfXori

Bases: RewritePattern

(x ^ a) ^ b -> x ^ (a ^ b)

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
class XoriOfXori(RewritePattern):
    """
    (x ^ a) ^ b -> x ^ (a ^ b)
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:

        if (
            isinstance(op.rs1, OpResult)
            and isinstance(inner_op := op.rs1.op, riscv.XoriOp)
            and isinstance(op.immediate, IntegerAttr)
            and isinstance(inner_op.immediate, IntegerAttr)
        ):
            combined_immediate = inner_op.immediate.value.data ^ op.immediate.value.data
            new_op = riscv.XoriOp(inner_op.rs1, combined_immediate, rd=op.rd.type)
            can_erase = inner_op.rd.has_one_use()
            rewriter.replace(op, new_op)
            if can_erase:
                rewriter.erase(inner_op)

match_and_rewrite(op: riscv.XoriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:

    if (
        isinstance(op.rs1, OpResult)
        and isinstance(inner_op := op.rs1.op, riscv.XoriOp)
        and isinstance(op.immediate, IntegerAttr)
        and isinstance(inner_op.immediate, IntegerAttr)
    ):
        combined_immediate = inner_op.immediate.value.data ^ op.immediate.value.data
        new_op = riscv.XoriOp(inner_op.rs1, combined_immediate, rd=op.rd.type)
        can_erase = inner_op.rd.has_one_use()
        rewriter.replace(op, new_op)
        if can_erase:
            rewriter.erase(inner_op)

XoriImmediate

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
329
330
331
332
333
334
335
336
337
338
class XoriImmediate(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
        if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
            op.immediate, IntegerAttr
        ):
            rd = op.rd.type
            rewriter.replace(
                op, rv32.LiOp(rs1.value.data ^ op.immediate.value.data, rd=rd)
            )

match_and_rewrite(op: riscv.XoriOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
330
331
332
333
334
335
336
337
338
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XoriOp, rewriter: PatternRewriter) -> None:
    if (rs1 := get_constant_value(op.rs1)) is not None and isinstance(
        op.immediate, IntegerAttr
    ):
        rd = op.rd.type
        rewriter.replace(
            op, rv32.LiOp(rs1.value.data ^ op.immediate.value.data, rd=rd)
        )

ShiftbyZero

Bases: RewritePattern, Generic[IWidth]

shift(x, 0) -> x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
class ShiftbyZero(RewritePattern, Generic[IWidth]):
    """
    shift(x, 0) -> x
    """

    shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]]

    def __init__(
        self,
        shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]],
    ):
        self.shift_op_type = shift_op_type

    def match_and_rewrite(
        self,
        op: Operation,
        rewriter: PatternRewriter,
    ) -> None:
        # check if the shift amount is zero
        if isa(op, self.shift_op_type) and (op.immediate.value.data == 0):
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]] = shift_op_type instance-attribute

__init__(shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]])

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
348
349
350
351
352
def __init__(
    self,
    shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]],
):
    self.shift_op_type = shift_op_type

match_and_rewrite(op: Operation, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
354
355
356
357
358
359
360
361
def match_and_rewrite(
    self,
    op: Operation,
    rewriter: PatternRewriter,
) -> None:
    # check if the shift amount is zero
    if isa(op, self.shift_op_type) and (op.immediate.value.data == 0):
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=op.rd.type))

ShiftConstantFolding

Bases: RewritePattern, Generic[IWidth]

shift(c1, c2) -> c3

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
class ShiftConstantFolding(RewritePattern, Generic[IWidth]):
    """
    shift(c1, c2) -> c3
    """

    li_op_type: type[LiOperation[IWidth]]
    shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]]

    def __init__(
        self,
        li_op_type: type[LiOperation[IWidth]],
        shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]],
    ):
        self.li_op_type = li_op_type
        self.shift_op_type = shift_op_type

    def match_and_rewrite(
        self,
        op: Operation,
        rewriter: PatternRewriter,
    ) -> None:
        if (
            isa(op, self.shift_op_type)
            and (rs1 := get_constant_value(op.rs1)) is not None
        ):
            rd = op.rd.type
            result = op.py_operation(cast(IntegerAttr[IWidth], rs1))
            rewriter.replace(op, self.li_op_type(result, rd=rd))

li_op_type: type[LiOperation[IWidth]] = li_op_type instance-attribute

shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]] = shift_op_type instance-attribute

__init__(li_op_type: type[LiOperation[IWidth]], shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]])

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
372
373
374
375
376
377
378
def __init__(
    self,
    li_op_type: type[LiOperation[IWidth]],
    shift_op_type: type[riscv.RdRsImmShiftOperation[Any, IWidth]],
):
    self.li_op_type = li_op_type
    self.shift_op_type = shift_op_type

match_and_rewrite(op: Operation, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
380
381
382
383
384
385
386
387
388
389
390
391
def match_and_rewrite(
    self,
    op: Operation,
    rewriter: PatternRewriter,
) -> None:
    if (
        isa(op, self.shift_op_type)
        and (rs1 := get_constant_value(op.rs1)) is not None
    ):
        rd = op.rd.type
        result = op.py_operation(cast(IntegerAttr[IWidth], rs1))
        rewriter.replace(op, self.li_op_type(result, rd=rd))

LoadWordWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
class LoadWordWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.LwOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
            and isinstance(op.immediate, IntegerAttr)
        ):
            rd = op.rd.type
            rewriter.replace(
                op,
                riscv.LwOp(
                    op.rs1.op.rs1,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    rd=rd,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.LwOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.LwOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
        and isinstance(op.immediate, IntegerAttr)
    ):
        rd = op.rd.type
        rewriter.replace(
            op,
            riscv.LwOp(
                op.rs1.op.rs1,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                rd=rd,
                comment=op.comment,
            ),
        )

StoreWordWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
class StoreWordWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.SwOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
        ):
            rewriter.replace(
                op,
                riscv.SwOp(
                    op.rs1.op.rs1,
                    op.rs2,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.SwOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.SwOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
    ):
        rewriter.replace(
            op,
            riscv.SwOp(
                op.rs1.op.rs1,
                op.rs2,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                comment=op.comment,
            ),
        )

LoadFloatWordWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
class LoadFloatWordWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FLwOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
            and isinstance(op.immediate, IntegerAttr)
        ):
            rd = op.rd.type
            rewriter.replace(
                op,
                riscv.FLwOp(
                    op.rs1.op.rs1,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    rd=rd,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.FLwOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FLwOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
        and isinstance(op.immediate, IntegerAttr)
    ):
        rd = op.rd.type
        rewriter.replace(
            op,
            riscv.FLwOp(
                op.rs1.op.rs1,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                rd=rd,
                comment=op.comment,
            ),
        )

StoreFloatWordWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
class StoreFloatWordWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FSwOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
        ):
            rewriter.replace(
                op,
                riscv.FSwOp(
                    op.rs1.op.rs1,
                    op.rs2,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.FSwOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FSwOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
    ):
        rewriter.replace(
            op,
            riscv.FSwOp(
                op.rs1.op.rs1,
                op.rs2,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                comment=op.comment,
            ),
        )

LoadDoubleWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
class LoadDoubleWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FLdOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
            and isinstance(op.immediate, IntegerAttr)
        ):
            rd = op.rd.type
            rewriter.replace(
                op,
                riscv.FLdOp(
                    op.rs1.op.rs1,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    rd=rd,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.FLdOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FLdOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
        and isinstance(op.immediate, IntegerAttr)
    ):
        rd = op.rd.type
        rewriter.replace(
            op,
            riscv.FLdOp(
                op.rs1.op.rs1,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                rd=rd,
                comment=op.comment,
            ),
        )

StoreDoubleWithKnownOffset

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
class StoreDoubleWithKnownOffset(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FSdOp, rewriter: PatternRewriter) -> None:
        if (
            isinstance(op.rs1, OpResult)
            and isinstance(op.rs1.op, riscv.AddiOp)
            and isinstance(op.rs1.op.immediate, IntegerAttr)
        ):
            rewriter.replace(
                op,
                riscv.FSdOp(
                    op.rs1.op.rs1,
                    op.rs2,
                    op.rs1.op.immediate.value.data + op.immediate.value.data,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv.FSdOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FSdOp, rewriter: PatternRewriter) -> None:
    if (
        isinstance(op.rs1, OpResult)
        and isinstance(op.rs1.op, riscv.AddiOp)
        and isinstance(op.rs1.op.immediate, IntegerAttr)
    ):
        rewriter.replace(
            op,
            riscv.FSdOp(
                op.rs1.op.rs1,
                op.rs2,
                op.rs1.op.immediate.value.data + op.immediate.value.data,
                comment=op.comment,
            ),
        )

AdditionOfSameVariablesToMultiplyByTwo

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
class AdditionOfSameVariablesToMultiplyByTwo(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AddOp, rewriter: PatternRewriter) -> None:
        if op.rs1 == op.rs2:
            rd = op.rd.type
            rewriter.replace(
                op,
                [
                    li_op := rv32.LiOp(2),
                    riscv.MulOp(
                        op.rs1,
                        li_op,
                        rd=rd,
                        comment=op.comment,
                    ),
                ],
            )

match_and_rewrite(op: riscv.AddOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AddOp, rewriter: PatternRewriter) -> None:
    if op.rs1 == op.rs2:
        rd = op.rd.type
        rewriter.replace(
            op,
            [
                li_op := rv32.LiOp(2),
                riscv.MulOp(
                    op.rs1,
                    li_op,
                    rd=rd,
                    comment=op.comment,
                ),
            ],
        )

FuseMultiplyAddD

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
class FuseMultiplyAddD(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.FAddDOp, rewriter: PatternRewriter) -> None:
        """
        Converts `c = a * b` and `d = e + c` to `d = e + a * b`.
        `c` should not be used anywhere else and both operations must have the
        `contract` fastmath flag set.
        """

        if not _has_contract_flag(op):
            return

        addend = mul = None
        if (
            isinstance(mul := op.rs2.owner, riscv.FMulDOp)
            and _has_contract_flag(mul)
            and mul.rd.has_one_use()
        ):
            addend = op.rs1
        elif (
            isinstance(mul := op.rs1.owner, riscv.FMulDOp)
            and _has_contract_flag(mul)
            and mul.rd.has_one_use()
        ):
            addend = op.rs2
        else:
            return

        rd = op.rd.type
        rewriter.replace(
            op,
            riscv.FMAddDOp(
                mul.rs1,
                mul.rs2,
                addend,
                rd=rd,
                comment=op.comment,
            ),
        )

match_and_rewrite(op: riscv.FAddDOp, rewriter: PatternRewriter) -> None

Converts c = a * b and d = e + c to d = e + a * b. c should not be used anywhere else and both operations must have the contract fastmath flag set.

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.FAddDOp, rewriter: PatternRewriter) -> None:
    """
    Converts `c = a * b` and `d = e + c` to `d = e + a * b`.
    `c` should not be used anywhere else and both operations must have the
    `contract` fastmath flag set.
    """

    if not _has_contract_flag(op):
        return

    addend = mul = None
    if (
        isinstance(mul := op.rs2.owner, riscv.FMulDOp)
        and _has_contract_flag(mul)
        and mul.rd.has_one_use()
    ):
        addend = op.rs1
    elif (
        isinstance(mul := op.rs1.owner, riscv.FMulDOp)
        and _has_contract_flag(mul)
        and mul.rd.has_one_use()
    ):
        addend = op.rs2
    else:
        return

    rd = op.rd.type
    rewriter.replace(
        op,
        riscv.FMAddDOp(
            mul.rs1,
            mul.rs2,
            addend,
            rd=rd,
            comment=op.comment,
        ),
    )

BitwiseAndByZero

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
class BitwiseAndByZero(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AndOp, rewriter: PatternRewriter):
        """
        rewrite pattern to optimize bitwise and by 0
        x & 0 = 0
        """

        # check if the first operand is 0
        if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
            # if the first operand is 0, set the destination to 0
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

        # check if the second operand is 0
        if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
            # if the second operand is 0, set the destination to 0
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

match_and_rewrite(op: riscv.AndOp, rewriter: PatternRewriter)

rewrite pattern to optimize bitwise and by 0 x & 0 = 0

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AndOp, rewriter: PatternRewriter):
    """
    rewrite pattern to optimize bitwise and by 0
    x & 0 = 0
    """

    # check if the first operand is 0
    if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
        # if the first operand is 0, set the destination to 0
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

    # check if the second operand is 0
    if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
        # if the second operand is 0, set the destination to 0
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

BitwiseAndBySelf

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
599
600
601
602
603
604
605
606
607
class BitwiseAndBySelf(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.AndOp, rewriter: PatternRewriter):
        """
        x & x = x
        """
        if op.rs1 == op.rs2:
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd, comment=op.comment))

match_and_rewrite(op: riscv.AndOp, rewriter: PatternRewriter)

x & x = x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
600
601
602
603
604
605
606
607
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.AndOp, rewriter: PatternRewriter):
    """
    x & x = x
    """
    if op.rs1 == op.rs2:
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd, comment=op.comment))

BitwiseOrByZero

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
class BitwiseOrByZero(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.OrOp, rewriter: PatternRewriter):
        """
        x | 0 = x
        """

        # check if the first operand is 0
        if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
            # if the first operand is 0, set the destination to the second operand
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

        # check if the second operand is 0
        elif (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
            # if the second operand is 0, set the destination to first operand
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

match_and_rewrite(op: riscv.OrOp, rewriter: PatternRewriter)

x | 0 = x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.OrOp, rewriter: PatternRewriter):
    """
    x | 0 = x
    """

    # check if the first operand is 0
    if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
        # if the first operand is 0, set the destination to the second operand
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

    # check if the second operand is 0
    elif (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
        # if the second operand is 0, set the destination to first operand
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

BitwiseOrBySelf

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
630
631
632
633
634
635
636
637
638
class BitwiseOrBySelf(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.OrOp, rewriter: PatternRewriter):
        """
        x | x = x
        """
        if op.rs1 == op.rs2:
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd, comment=op.comment))

match_and_rewrite(op: riscv.OrOp, rewriter: PatternRewriter)

x | x = x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
631
632
633
634
635
636
637
638
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.OrOp, rewriter: PatternRewriter):
    """
    x | x = x
    """
    if op.rs1 == op.rs2:
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd, comment=op.comment))

XorBySelf

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
class XorBySelf(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XorOp, rewriter: PatternRewriter):
        """
        x ^ x = 0
        """
        if op.rs1 == op.rs2:
            rd = op.rd.type
            rewriter.replace(
                op,
                (
                    zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                    riscv.MVOp(zero.res, rd=rd, comment=op.comment),
                ),
            )

match_and_rewrite(op: riscv.XorOp, rewriter: PatternRewriter)

x ^ x = 0

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
642
643
644
645
646
647
648
649
650
651
652
653
654
655
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XorOp, rewriter: PatternRewriter):
    """
    x ^ x = 0
    """
    if op.rs1 == op.rs2:
        rd = op.rd.type
        rewriter.replace(
            op,
            (
                zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                riscv.MVOp(zero.res, rd=rd, comment=op.comment),
            ),
        )

BitwiseXorByZero

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
658
659
660
661
662
663
664
665
666
667
668
669
670
class BitwiseXorByZero(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: riscv.XorOp, rewriter: PatternRewriter):
        """
        x ^ 0 = x
        """
        if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

        if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
            rd = op.rd.type
            rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

match_and_rewrite(op: riscv.XorOp, rewriter: PatternRewriter)

x ^ 0 = x

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
659
660
661
662
663
664
665
666
667
668
669
670
@op_type_rewrite_pattern
def match_and_rewrite(self, op: riscv.XorOp, rewriter: PatternRewriter):
    """
    x ^ 0 = x
    """
    if (rs1 := get_constant_value(op.rs1)) is not None and rs1.value.data == 0:
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs2, rd=rd))

    if (rs2 := get_constant_value(op.rs2)) is not None and rs2.value.data == 0:
        rd = op.rd.type
        rewriter.replace(op, riscv.MVOp(op.rs1, rd=rd))

ScfgwOpUsingImmediate

Bases: RewritePattern

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
673
674
675
676
677
678
679
680
681
682
683
684
685
686
class ScfgwOpUsingImmediate(RewritePattern):
    @op_type_rewrite_pattern
    def match_and_rewrite(
        self, op: riscv_snitch.ScfgwOp, rewriter: PatternRewriter
    ) -> None:
        if (rs2 := get_constant_value(op.rs2)) is not None:
            rewriter.replace(
                op,
                riscv_snitch.ScfgwiOp(
                    op.rs1,
                    rs2.value.data,
                    comment=op.comment,
                ),
            )

match_and_rewrite(op: riscv_snitch.ScfgwOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
674
675
676
677
678
679
680
681
682
683
684
685
686
@op_type_rewrite_pattern
def match_and_rewrite(
    self, op: riscv_snitch.ScfgwOp, rewriter: PatternRewriter
) -> None:
    if (rs2 := get_constant_value(op.rs2)) is not None:
        rewriter.replace(
            op,
            riscv_snitch.ScfgwiOp(
                op.rs1,
                rs2.value.data,
                comment=op.comment,
            ),
        )

LoadImmediate0

Bases: RewritePattern

The canonical form of an operation that stores a 0 to register RD is li RD, ZERO.

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
class LoadImmediate0(RewritePattern):
    """
    The canonical form of an operation that stores a 0 to register RD is li RD, ZERO.
    """

    @op_type_rewrite_pattern
    def match_and_rewrite(self, op: rv32.LiOp, rewriter: PatternRewriter) -> None:
        if not (isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0):
            return

        rd = op.rd.type
        if rd == riscv.Registers.ZERO:
            rewriter.replace(op, rv32.GetRegisterOp(riscv.Registers.ZERO))
        else:
            rewriter.replace(
                op,
                (
                    zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                    riscv.MVOp(zero.res, rd=rd, comment=op.comment),
                ),
            )

match_and_rewrite(op: rv32.LiOp, rewriter: PatternRewriter) -> None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
@op_type_rewrite_pattern
def match_and_rewrite(self, op: rv32.LiOp, rewriter: PatternRewriter) -> None:
    if not (isinstance(op.immediate, IntegerAttr) and op.immediate.value.data == 0):
        return

    rd = op.rd.type
    if rd == riscv.Registers.ZERO:
        rewriter.replace(op, rv32.GetRegisterOp(riscv.Registers.ZERO))
    else:
        rewriter.replace(
            op,
            (
                zero := rv32.GetRegisterOp(riscv.Registers.ZERO),
                riscv.MVOp(zero.res, rd=rd, comment=op.comment),
            ),
        )

get_constant_value(value: SSAValue) -> IntegerAttr[I32] | IntegerAttr[I64] | None

Source code in xdsl/transforms/canonicalization_patterns/riscv.py 
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
def get_constant_value(
    value: SSAValue,
) -> IntegerAttr[I32] | IntegerAttr[I64] | None:
    if not isinstance(value, OpResult):
        return

    if value.type == riscv.Registers.ZERO:
        if isinstance(value.op, rv32.GetRegisterOp):
            return IntegerAttr(0, i32)
        elif isinstance(value.op, rv64.GetRegisterOp):
            return IntegerAttr(0, i64)

    if isinstance(value.op, riscv.MVOp):
        return get_constant_value(value.op.rs)

    if (
        result := ConstantLike.get_constant_value(value)
    ) is not None and _I32_I64_CONSTRAINT.verifies(result):
        return cast(IntegerAttr[I32] | IntegerAttr[I64], result)