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(expand_expr, case COMPONENT_REF): Don't actually do extraction from 

memory if we want address.

(emit_block_move): Fix problems in last change.

From-SVN: r1873
This commit is contained in:
Richard Kenner 1992-08-17 07:37:25 -04:00
parent a73f9fc940
commit 0bba3f6fb7
1 changed files with 14 additions and 7 deletions
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21
gcc/expr.c
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@ -1175,26 +1175,31 @@ emit_block_move (x, y, size, align)
including more than one in the machine description unless
the more limited one has some advantage. */
rtx opalign = GEN_INT (align);
enum machine_mode mode;
for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT); mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
{
enum insn_code code = movstr_optab[(int) mode];
rtx opalign = GEN_INT (align);
if (code != CODE_FOR_nothing
&& GET_MODE_BITSIZE (mode) < HOST_BITS_PER_WIDE_INT
&& GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT
&& (unsigned) INTVAL (size) <= GET_MODE_MASK (mode)
&& (*insn_operand_predicate[(int) code][0]) (x, Pmode)
&& (*insn_operand_predicate[(int) code][1]) (y, Pmode)
&& (*insn_operand_predicate[(int) code][3]) (opalign, VOIDmode))
&& (insn_operand_predicate[(int) code][0] == 0
|| (*insn_operand_predicate[(int) code][0]) (x, BLKmode))
&& (insn_operand_predicate[(int) code][1] == 0
|| (*insn_operand_predicate[(int) code][1]) (y, BLKmode))
&& (insn_operand_predicate[(int) code][3] == 0
|| (*insn_operand_predicate[(int) code][3]) (opalign,
VOIDmode)))
{
rtx op2 = size;
rtx last = get_last_insn ();
rtx pat;
if (! (*insn_operand_predicate[(int) code][2]) (op2, mode))
if (insn_operand_predicate[(int) code][2] != 0
&& ! (*insn_operand_predicate[(int) code][2]) (op2, mode))
op2 = copy_to_mode_reg (mode, op2);
pat = GEN_FCN ((int) code) (x, y, op2, opalign);
@ -3662,7 +3667,9 @@ expand_expr (exp, target, tmode, modifier)
}
if (mode1 == VOIDmode
|| (mode1 != BLKmode && ! direct_load[(int) mode1])
|| (mode1 != BLKmode && ! direct_load[(int) mode1]
&& modifier != EXPAND_CONST_ADDRESS
&& modifier != EXPAND_SUM && modifier != EXPAND_INITIALIZER)
|| GET_CODE (op0) == REG || GET_CODE (op0) == SUBREG)
{
/* In cases where an aligned union has an unaligned object