mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-04-17 05:10:28 +08:00
Code Issues Packages Projects Releases Wiki Activity

re PR target/23630 (built-ins MMX regression)

Browse Source 
PR target/23630
        * expr.c (expand_expr_real_1) <VIEW_CONVERT_EXPR>: Use gen_lowpart
        whenever the mode sizes match.

From-SVN: r103660
This commit is contained in:
Richard Henderson 2005-08-30 22:00:37 -07:00
parent eb6b2571f3
commit fabaaf3678
2 changed files with 21 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2005-08-30 Richard Henderson <rth@redhat.com>
PR target/23630
* expr.c (expand_expr_real_1) <VIEW_CONVERT_EXPR>: Use gen_lowpart
whenever the mode sizes match.
2005-08-31 Alan Modra <amodra@bigpond.net.au>
* calls.c (load_register_parameters): Fix comment typo.
@ -84,8 +90,8 @@
2005-08-27 David Edelsohn <edelsohn@gnu.org>
PR target/23539
* config/rs6000/rs6000.c (expand_block_clear): Use HImode when
bytes >= 2 not bytes == 2.
* config/rs6000/rs6000.c (expand_block_clear): Use HImode when
bytes >= 2 not bytes == 2.
(expand_block_move): Same.
2005-08-27 Richard Guenther <rguenther@suse.de>

21
gcc/expr.c
View File

@ -7505,18 +7505,23 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
case VIEW_CONVERT_EXPR:
op0 = expand_expr (TREE_OPERAND (exp, 0), NULL_RTX, mode, modifier);
/* If the input and output modes are both the same, we are done.
Otherwise, if neither mode is BLKmode and both are integral and within
a word, we can use gen_lowpart. If neither is true, make sure the
operand is in memory and convert the MEM to the new mode. */
/* If the input and output modes are both the same, we are done. */
if (TYPE_MODE (type) == GET_MODE (op0))
;
/* If neither mode is BLKmode, and both modes are the same size
then we can use gen_lowpart. */
else if (TYPE_MODE (type) != BLKmode && GET_MODE (op0) != BLKmode
&& GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT
&& GET_MODE_CLASS (TYPE_MODE (type)) == MODE_INT
&& GET_MODE_SIZE (TYPE_MODE (type)) <= UNITS_PER_WORD
&& GET_MODE_SIZE (GET_MODE (op0)) <= UNITS_PER_WORD)
&& GET_MODE_SIZE (TYPE_MODE (type))
== GET_MODE_SIZE (GET_MODE (op0)))
op0 = gen_lowpart (TYPE_MODE (type), op0);
/* If both modes are integral, then we can convert from one to the
other. */
else if (SCALAR_INT_MODE_P (GET_MODE (op0))
&& SCALAR_INT_MODE_P (TYPE_MODE (type)))
op0 = convert_modes (TYPE_MODE (type), GET_MODE (op0), op0,
TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))));
/* As a last resort, spill op0 to memory, and reload it in a
different mode. */
else if (!MEM_P (op0))
{
/* If the operand is not a MEM, force it into memory. Since we