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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-09-04 10:48:40 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-09-04 10:48:40 +0000 |
| commit | 3d09ba95c150d9676f9a2585fb61315e86fa644a (patch) | |
| tree | 6c37f118811f8cff123ef56870a20145fd74b472 /gcc/rtl.h | |
| parent | d8c40eff56f69877b33c697ded756d50fde90c27 (diff) | |
| download | gcc-3d09ba95c150d9676f9a2585fb61315e86fa644a.zip gcc-3d09ba95c150d9676f9a2585fb61315e86fa644a.tar.gz gcc-3d09ba95c150d9676f9a2585fb61315e86fa644a.tar.bz2 | |
Add subreg_memory_offset helper functions
This patch adds routines for converting a SUBREG_BYTE offset into a
memory address offset. The two only differ for paradoxical subregs,
where SUBREG_BYTE is always 0 but the memory address offset can be
negative.
2017-09-04 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* rtl.h (subreg_memory_offset): Declare.
* emit-rtl.c (subreg_memory_offset): New function.
* expmed.c (store_bit_field_1): Use it.
* expr.c (undefined_operand_subword_p): Likewise.
* simplify-rtx.c (simplify_subreg): Likewise.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251644
Diffstat (limited to 'gcc/rtl.h')
| -rw-r--r-- | gcc/rtl.h | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -2888,6 +2888,8 @@ subreg_highpart_offset (machine_mode outermode, machine_mode innermode) } extern int byte_lowpart_offset (machine_mode, machine_mode); +extern int subreg_memory_offset (machine_mode, machine_mode, unsigned int); +extern int subreg_memory_offset (const_rtx); extern rtx make_safe_from (rtx, rtx); extern rtx convert_memory_address_addr_space_1 (scalar_int_mode, rtx, addr_space_t, bool, bool); |