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Zwinkau
libfirm
Commits
8d2aba71
Commit
8d2aba71
authored
Feb 17, 2014
by
Matthias Braun
Browse files
Unknown values should not CSE
parent
934754c2
Changes
2
Hide whitespace changes
Inline
Side-by-side
ir/ir/irop.c
View file @
8d2aba71
...
...
@@ -437,12 +437,11 @@ static int node_cmp_attr_ASM(const ir_node *a, const ir_node *b)
return
node_cmp_exception
(
a
,
b
);
}
/**
Compares the inexistent attributes of two Dummy nodes
. */
static
int
node_cmp_attr_
Dummy
(
const
ir_node
*
a
,
const
ir_node
*
b
)
/**
Use this for nodes that should not CSE
. */
static
int
node_cmp_attr_
unequal
(
const
ir_node
*
a
,
const
ir_node
*
b
)
{
(
void
)
a
;
(
void
)
b
;
/* Dummy nodes never equal by definition */
return
1
;
}
...
...
@@ -599,9 +598,9 @@ void firm_init_op(void)
ir_init_opcodes
();
be_init_op
();
set_op_cmp_attr
(
op_ASM
,
node_cmp_attr_ASM
);
set_op_cmp_attr
(
op_Address
,
node_cmp_attr_entconst
);
set_op_cmp_attr
(
op_Align
,
node_cmp_attr_typeconst
);
set_op_cmp_attr
(
op_ASM
,
node_cmp_attr_ASM
);
set_op_cmp_attr
(
op_Alloc
,
node_cmp_attr_Alloc
);
set_op_cmp_attr
(
op_Builtin
,
node_cmp_attr_Builtin
);
set_op_cmp_attr
(
op_Call
,
node_cmp_attr_Call
);
...
...
@@ -610,7 +609,7 @@ void firm_init_op(void)
set_op_cmp_attr
(
op_Const
,
node_cmp_attr_Const
);
set_op_cmp_attr
(
op_CopyB
,
node_cmp_attr_CopyB
);
set_op_cmp_attr
(
op_Div
,
node_cmp_attr_Div
);
set_op_cmp_attr
(
op_Dummy
,
node_cmp_attr_
Dummy
);
set_op_cmp_attr
(
op_Dummy
,
node_cmp_attr_
unequal
);
set_op_cmp_attr
(
op_Load
,
node_cmp_attr_Load
);
set_op_cmp_attr
(
op_Mod
,
node_cmp_attr_Mod
);
set_op_cmp_attr
(
op_Offset
,
node_cmp_attr_entconst
);
...
...
@@ -619,6 +618,7 @@ void firm_init_op(void)
set_op_cmp_attr
(
op_Sel
,
node_cmp_attr_Sel
);
set_op_cmp_attr
(
op_Size
,
node_cmp_attr_typeconst
);
set_op_cmp_attr
(
op_Store
,
node_cmp_attr_Store
);
set_op_cmp_attr
(
op_Unknown
,
node_cmp_attr_unequal
);
set_op_hash
(
op_Address
,
hash_entconst
);
set_op_hash
(
op_Align
,
hash_typeconst
);
...
...
scripts/ir_spec.py
View file @
8d2aba71
...
...
@@ -850,7 +850,11 @@ class Tuple:
@
op
class
Unknown
:
"""Returns an unknown (at compile- and runtime) value. It is a valid
optimization to replace an Unknown by any other constant value."""
optimization to replace an Unknown by any other constant value.
Be carefull when optimising Unknown values, you cannot simply replace
Unknown+x or Unknown<x with a new Unknown node if there are multiple
users of the original unknown node!"""
knownBlock
=
True
pinned
=
"yes"
block
=
"get_irg_start_block(irg)"
...
...
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