diff options
| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-08-24 07:47:13 +0000 |
|---|---|---|
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-08-24 07:47:13 +0000 |
| commit | 451feb44909370bd13adf4628d2c8301ae1c22ea (patch) | |
| tree | 6f855d2a1086c19ac74a86f0dfd87f1b2704e4b5 /gcc/combine.c | |
| parent | d57391ef86276d81044bd64437289ab92bb887c6 (diff) | |
| download | gcc-451feb44909370bd13adf4628d2c8301ae1c22ea.tar.gz | |
Make more use of subreg_offset_from_lsb
This patch makes use of the subreg_offset_from_lsb function
added by an earlier patch in the SVE series.
2017-08-24 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* combine.c (make_extraction): Use subreg_offset_from_lsb.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@251326 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 7aa0a359f48..b34fb81c97a 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7488,26 +7488,15 @@ make_extraction (machine_mode mode, rtx inner, HOST_WIDE_INT pos, return a new hard register. */ if (pos || in_dest) { - HOST_WIDE_INT final_word = pos / BITS_PER_WORD; - - if (WORDS_BIG_ENDIAN - && GET_MODE_SIZE (inner_mode) > UNITS_PER_WORD) - final_word = ((GET_MODE_SIZE (inner_mode) - - GET_MODE_SIZE (tmode)) - / UNITS_PER_WORD) - final_word; - - final_word *= UNITS_PER_WORD; - if (BYTES_BIG_ENDIAN && - GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (tmode)) - final_word += (GET_MODE_SIZE (inner_mode) - - GET_MODE_SIZE (tmode)) % UNITS_PER_WORD; + unsigned int offset + = subreg_offset_from_lsb (tmode, inner_mode, pos); /* Avoid creating invalid subregs, for example when simplifying (x>>32)&255. */ - if (!validate_subreg (tmode, inner_mode, inner, final_word)) + if (!validate_subreg (tmode, inner_mode, inner, offset)) return NULL_RTX; - new_rtx = gen_rtx_SUBREG (tmode, inner, final_word); + new_rtx = gen_rtx_SUBREG (tmode, inner, offset); } else new_rtx = gen_lowpart (tmode, inner); |