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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-10-13 09:23:54 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-10-13 09:23:54 +0000 |
| commit | 610c45fcbfff43176beefefcea74c6137a432220 (patch) | |
| tree | fc56c08135f71cfb00cb65322910c3e569682d8e /gcc/calls.c | |
| parent | 5752d1f7943db65667edeaf8481dc10b60a23197 (diff) | |
| download | gcc-610c45fcbfff43176beefefcea74c6137a432220.zip gcc-610c45fcbfff43176beefefcea74c6137a432220.tar.gz gcc-610c45fcbfff43176beefefcea74c6137a432220.tar.bz2 | |
Make more use of subreg_lowpart_offset
This patch uses subreg_lowpart_offset in places that open-coded
the calculation. It also uses it in regcprop.c to test whether,
after a mode change, the first register in a multi-register group
is still the right one.
2017-10-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* calls.c (expand_call): Use subreg_lowpart_offset.
* cse.c (cse_insn): Likewise.
* regcprop.c (copy_value): Likewise.
(copyprop_hardreg_forward_1): Likewise.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r253713
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 4d54fc6..7ed05d4 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -4117,7 +4117,6 @@ expand_call (tree exp, rtx target, int ignore) { tree type = rettype; int unsignedp = TYPE_UNSIGNED (type); - int offset = 0; machine_mode pmode; /* Ensure we promote as expected, and get the new unsignedness. */ @@ -4125,18 +4124,8 @@ expand_call (tree exp, rtx target, int ignore) funtype, 1); gcc_assert (GET_MODE (target) == pmode); - if ((WORDS_BIG_ENDIAN || BYTES_BIG_ENDIAN) - && (GET_MODE_SIZE (GET_MODE (target)) - > GET_MODE_SIZE (TYPE_MODE (type)))) - { - offset = GET_MODE_SIZE (GET_MODE (target)) - - GET_MODE_SIZE (TYPE_MODE (type)); - if (! BYTES_BIG_ENDIAN) - offset = (offset / UNITS_PER_WORD) * UNITS_PER_WORD; - else if (! WORDS_BIG_ENDIAN) - offset %= UNITS_PER_WORD; - } - + unsigned int offset = subreg_lowpart_offset (TYPE_MODE (type), + GET_MODE (target)); target = gen_rtx_SUBREG (TYPE_MODE (type), target, offset); SUBREG_PROMOTED_VAR_P (target) = 1; SUBREG_PROMOTED_SET (target, unsignedp); |