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reload1.c (reload_cse_simplify_set): For LOAD_EXTEND_OP, do not "widen" a destination that is already wider than a word.

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* reload1.c (reload_cse_simplify_set): For LOAD_EXTEND_OP, do not
        "widen" a destination that is already wider than a word.  Also do
        not widen if LOAD_EXTEND_OP is NIL for the given mode.

From-SVN: r40510
This commit is contained in:
Jeffrey A Law 2001-03-15 19:55:43 +00:00 committed by Jeff Law
parent bb2cf916da
commit b216e516b8
2 changed files with 13 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Thu Mar 15 12:57:14 2001 Jeffrey A Law (law@cygnus.com)
* reload1.c (reload_cse_simplify_set): For LOAD_EXTEND_OP, do not
"widen" a destination that is already wider than a word. Also do
not widen if LOAD_EXTEND_OP is NIL for the given mode.
2001-03-15 Bernd Schmidt <bernds@redhat.com>
* config/ia64/ia64.c (ia64_sched_reorder): Remove debugging aids.

10
gcc/reload1.c
View File

@ -8279,9 +8279,13 @@ reload_cse_simplify_set (set, insn)
&& GET_CODE (SET_SRC (set)) != REG))
{
#ifdef LOAD_EXTEND_OP
rtx wide_dest = gen_rtx_REG (word_mode, REGNO (SET_DEST (set)));
ORIGINAL_REGNO (wide_dest) = ORIGINAL_REGNO (SET_DEST (set));
validate_change (insn, &SET_DEST (set), wide_dest, 1);
if (GET_MODE_BITSIZE (GET_MODE (SET_DEST (set))) < BITS_PER_WORD
&& extend_op != NIL)
{
rtx wide_dest = gen_rtx_REG (word_mode, REGNO (SET_DEST (set)));
ORIGINAL_REGNO (wide_dest) = ORIGINAL_REGNO (SET_DEST (set));
validate_change (insn, &SET_DEST (set), wide_dest, 1);
}
#endif
validate_change (insn, &SET_SRC (set), copy_rtx (this_rtx), 1);