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tree-ssa-dom.c (gimple_assign_unary_useless_conversion_p): Remove. 

2009-04-17  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-dom.c (gimple_assign_unary_useless_conversion_p): Remove.
	(record_equivalences_from_stmt): Remove useless checks and
	simplifications.
	* tree-ssa-pre.c (eliminate): Avoid converting a constant if
	the type is already suitable.

From-SVN: r146260
This commit is contained in:
Richard Guenther 2009-04-17 12:43:02 +00:00 committed by Richard Biener
parent 01cd0938b5
commit 7e67327329
3 changed files with 13 additions and 27 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2009-04-17 Richard Guenther <rguenther@suse.de>
* tree-ssa-dom.c (gimple_assign_unary_useless_conversion_p): Remove.
(record_equivalences_from_stmt): Remove useless checks and
simplifications.
* tree-ssa-pre.c (eliminate): Avoid converting a constant if
the type is already suitable.
2009-04-17 Paolo Bonzini <bonzini@gnu.org>
* config/sh/sh.h (FUNCTION_VALUE): Fix call to sh_promote_prototypes.

26
gcc/tree-ssa-dom.c
View File

@ -1915,26 +1915,6 @@ eliminate_redundant_computations (gimple_stmt_iterator* gsi)
return retval;
}
/* Return true if statement GS is an assignment that peforms a useless
type conversion. It is is intended to be a tuples analog of function
tree_ssa_useless_type_conversion. */
static bool
gimple_assign_unary_useless_conversion_p (gimple gs)
{
if (is_gimple_assign (gs)
&& (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (gs))
|| gimple_assign_rhs_code (gs) == VIEW_CONVERT_EXPR
|| gimple_assign_rhs_code (gs) == NON_LVALUE_EXPR))
{
tree lhs_type = TREE_TYPE (gimple_assign_lhs (gs));
tree rhs_type = TREE_TYPE (gimple_assign_rhs1 (gs));
return useless_type_conversion_p (lhs_type, rhs_type);
}
return false;
}
/* STMT, a GIMPLE_ASSIGN, may create certain equivalences, in either
the available expressions table or the const_and_copies table.
Detect and record those equivalences. */
@ -1953,14 +1933,10 @@ record_equivalences_from_stmt (gimple stmt, int may_optimize_p)
lhs_code = TREE_CODE (lhs);
if (lhs_code == SSA_NAME
&& (gimple_assign_single_p (stmt)
|| gimple_assign_unary_useless_conversion_p (stmt)))
&& gimple_assign_single_p (stmt))
{
tree rhs = gimple_assign_rhs1 (stmt);
/* Strip away any useless type conversions. */
STRIP_USELESS_TYPE_CONVERSION (rhs);
/* If the RHS of the assignment is a constant or another variable that
may be propagated, register it in the CONST_AND_COPIES table. We
do not need to record unwind data for this, since this is a true

6
gcc/tree-ssa-pre.c
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@ -3981,8 +3981,10 @@ eliminate (void)
value is constant, use that constant. */
if (!sprime && is_gimple_min_invariant (VN_INFO (lhs)->valnum))
{
sprime = fold_convert (TREE_TYPE (lhs),
VN_INFO (lhs)->valnum);
sprime = VN_INFO (lhs)->valnum;
if (!useless_type_conversion_p (TREE_TYPE (lhs),
TREE_TYPE (sprime)))
sprime = fold_convert (TREE_TYPE (lhs), sprime);
if (dump_file && (dump_flags & TDF_DETAILS))
{