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Alpha: Remove code duplication in block clear trailer

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Remove code duplication in the part of `alpha_expand_block_clear' that
handles any aligned trailing part of the block, observing that the two
legs of code only differ by the machine mode and that we already take
the same approach with handling any unaligned prefix earlier on.  No
functional change, just code shuffling.

	gcc/
	* config/alpha/alpha.cc (alpha_expand_block_clear): Fold two
	legs of a conditional together.
This commit is contained in:
Maciej W. Rozycki 2024-12-25 22:23:39 +00:00
parent 3c99ea19d2
commit 6036a1a479
1 changed files with 12 additions and 29 deletions
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41
gcc/config/alpha/alpha.cc
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@ -4236,40 +4236,23 @@ alpha_expand_block_clear (rtx operands[])
/* If we have appropriate alignment (and it wouldn't take too many
instructions otherwise), mask out the bytes we need. */
if (TARGET_BWX ? words > 2 : bytes > 0)
if ((TARGET_BWX ? words > 2 : bytes > 0)
&& (align >= 64 || (align >= 32 && bytes < 4)))
{
if (align >= 64)
{
rtx mem, tmp;
HOST_WIDE_INT mask;
machine_mode mode = (align >= 64 ? DImode : SImode);
rtx mem, tmp;
HOST_WIDE_INT mask;
mem = adjust_address (orig_dst, DImode, ofs);
set_mem_alias_set (mem, 0);
mem = adjust_address (orig_dst, mode, ofs);
set_mem_alias_set (mem, 0);
mask = HOST_WIDE_INT_M1U << (bytes * 8);
mask = HOST_WIDE_INT_M1U << (bytes * 8);
tmp = expand_binop (DImode, and_optab, mem, GEN_INT (mask),
NULL_RTX, 1, OPTAB_WIDEN);
tmp = expand_binop (mode, and_optab, mem, GEN_INT (mask),
NULL_RTX, 1, OPTAB_WIDEN);
emit_move_insn (mem, tmp);
return 1;
}
else if (align >= 32 && bytes < 4)
{
rtx mem, tmp;
HOST_WIDE_INT mask;
mem = adjust_address (orig_dst, SImode, ofs);
set_mem_alias_set (mem, 0);
mask = HOST_WIDE_INT_M1U << (bytes * 8);
tmp = expand_binop (SImode, and_optab, mem, GEN_INT (mask),
NULL_RTX, 1, OPTAB_WIDEN);
emit_move_insn (mem, tmp);
return 1;
}
emit_move_insn (mem, tmp);
return 1;
}
if (!TARGET_BWX && bytes >= 4)