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expr.c (move_by_pieces): Honor the alignment of TO and FROM.

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* expr.c (move_by_pieces): Honor the alignment of TO and FROM.
(emit_push_insn): Don't use push when the source alignment is less
than the stack's push rounding.

From-SVN: r66770
This commit is contained in:
DJ Delorie 2003-05-13 14:15:20 -04:00 committed by DJ Delorie
parent fa6ef81367
commit f26aca6db2
2 changed files with 10 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2003-05-12 DJ Delorie <dj@redhat.com>
* expr.c (move_by_pieces): Honor the alignment of TO and FROM.
(emit_push_insn): Don't use push when the source alignment is less
than the stack's push rounding.
2003-05-13 Zack Weinberg <zack@codesourcery.com>
* diagnostic.c (output_format): Add support for %m.

5
gcc/expr.c
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@ -1463,7 +1463,7 @@ convert_modes (mode, oldmode, x, unsignedp)
If PUSH_ROUNDING is defined and TO is NULL, emit_single_push_insn is
used to push FROM to the stack.
ALIGN is maximum alignment we can assume. */
ALIGN is maximum stack alignment we can assume. */
void
move_by_pieces (to, from, len, align)
@ -1477,6 +1477,8 @@ move_by_pieces (to, from, len, align)
enum machine_mode mode = VOIDmode, tmode;
enum insn_code icode;
align = MIN (to ? MEM_ALIGN (to) : align, MEM_ALIGN (from));
data.offset = 0;
data.from_addr = from_addr;
if (to)
@ -3849,6 +3851,7 @@ emit_push_insn (x, mode, type, size, align, partial, reg, extra,
&& PUSH_ARGS
&& GET_CODE (size) == CONST_INT
&& skip == 0
&& MEM_ALIGN (xinner) >= align
&& (MOVE_BY_PIECES_P ((unsigned) INTVAL (size) - used, align))
/* Here we avoid the case of a structure whose weak alignment
forces many pushes of a small amount of data,