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tree-ssa-ccp.c (canonicalize_float_value): Rename to ... 

2013-11-07  Richard Biener  <rguenther@suse.de>

	* tree-ssa-ccp.c (canonicalize_float_value): Rename to ...
	(canonicalize_value): ... this.  Also handle stripping of
	TREE_OVERFLOW.
	(get_value, set_lattice_value, get_value_for_expr): Adjust.
	* gimple-fold.c (canonicalize_constructor_val): Strip
	TREE_OVERFLOW.
	* tree-ssa-threadedge.c (set_ssa_name_value): Likewise.

From-SVN: r204506
This commit is contained in:
Richard Biener 2013-11-07 11:33:03 +00:00 committed by Richard Biener
parent b0a9217cca
commit 846abd0d6d
4 changed files with 29 additions and 8 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2013-11-07 Richard Biener <rguenther@suse.de>
* tree-ssa-ccp.c (canonicalize_float_value): Rename to ...
(canonicalize_value): ... this. Also handle stripping of
TREE_OVERFLOW.
(get_value, set_lattice_value, get_value_for_expr): Adjust.
* gimple-fold.c (canonicalize_constructor_val): Strip
TREE_OVERFLOW.
* tree-ssa-threadedge.c (set_ssa_name_value): Likewise.
2013-11-07 Richard Biener <rguenther@suse.de>
* tree-dfa.c (get_ref_base_and_extent): Fix casting.

2
gcc/gimple-fold.c
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@ -205,6 +205,8 @@ canonicalize_constructor_val (tree cval, tree from_decl)
cval = fold_convert (TREE_TYPE (orig_cval), cval);
return cval;
}
if (TREE_OVERFLOW_P (cval))
return drop_tree_overflow (cval);
return orig_cval;
}

23
gcc/tree-ssa-ccp.c
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@ -168,7 +168,7 @@ typedef struct prop_value_d prop_value_t;
static prop_value_t *const_val;
static unsigned n_const_val;
static void canonicalize_float_value (prop_value_t *);
static void canonicalize_value (prop_value_t *);
static bool ccp_fold_stmt (gimple_stmt_iterator *);
/* Dump constant propagation value VAL to file OUTF prefixed by PREFIX. */
@ -326,7 +326,7 @@ get_value (tree var)
if (val->lattice_val == UNINITIALIZED)
*val = get_default_value (var);
canonicalize_float_value (val);
canonicalize_value (val);
return val;
}
@ -378,17 +378,24 @@ set_value_varying (tree var)
that HONOR_NANS is false, and we try to change the value of x to 0,
causing an ICE. With HONOR_NANS being false, the real appearance of
NaN would cause undefined behavior, though, so claiming that y (and x)
are UNDEFINED initially is correct. */
are UNDEFINED initially is correct.
For other constants, make sure to drop TREE_OVERFLOW. */
static void
canonicalize_float_value (prop_value_t *val)
canonicalize_value (prop_value_t *val)
{
enum machine_mode mode;
tree type;
REAL_VALUE_TYPE d;
if (val->lattice_val != CONSTANT
|| TREE_CODE (val->value) != REAL_CST)
if (val->lattice_val != CONSTANT)
return;
if (TREE_OVERFLOW_P (val->value))
val->value = drop_tree_overflow (val->value);
if (TREE_CODE (val->value) != REAL_CST)
return;
d = TREE_REAL_CST (val->value);
@ -454,7 +461,7 @@ set_lattice_value (tree var, prop_value_t new_val)
/* We can deal with old UNINITIALIZED values just fine here. */
prop_value_t *old_val = &const_val[SSA_NAME_VERSION (var)];
canonicalize_float_value (&new_val);
canonicalize_value (&new_val);
/* We have to be careful to not go up the bitwise lattice
represented by the mask.
@ -569,7 +576,7 @@ get_value_for_expr (tree expr, bool for_bits_p)
val.lattice_val = CONSTANT;
val.value = expr;
val.mask = double_int_zero;
canonicalize_float_value (&val);
canonicalize_value (&val);
}
else if (TREE_CODE (expr) == ADDR_EXPR)
val = get_value_from_alignment (expr);

2
gcc/tree-ssa-threadedge.c
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@ -58,6 +58,8 @@ set_ssa_name_value (tree name, tree value)
{
if (SSA_NAME_VERSION (name) >= ssa_name_values.length ())
ssa_name_values.safe_grow_cleared (SSA_NAME_VERSION (name) + 1);
if (value && TREE_OVERFLOW_P (value))
value = drop_tree_overflow (value);
ssa_name_values[SSA_NAME_VERSION (name)] = value;
}