diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 14 |
2 files changed, 17 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9a62e12..c39b351 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-09-07 Wilco Dijkstra <wdijkstr@arm.com> + + * config/aarch64/aarch64.c (aarch64_legitimize_address): + Avoid use of base_offset if offset already in range. + 2016-09-07 Kaz Kojima <kkojima@gcc.gnu.org> * config/sh/sh-protos.h (struct sh_atomic_model, diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 5efad46..2be750e 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -5082,9 +5082,19 @@ aarch64_legitimize_address (rtx x, rtx /* orig_x */, machine_mode mode) /* For offsets aren't a multiple of the access size, the limit is -256...255. */ else if (offset & (GET_MODE_SIZE (mode) - 1)) - base_offset = (offset + 0x100) & ~0x1ff; + { + base_offset = (offset + 0x100) & ~0x1ff; + + /* BLKmode typically uses LDP of X-registers. */ + if (mode == BLKmode) + base_offset = (offset + 512) & ~0x3ff; + } + /* Small negative offsets are supported. */ + else if (IN_RANGE (offset, -256, 0)) + base_offset = 0; + /* Use 12-bit offset by access size. */ else - base_offset = offset & ~0xfff; + base_offset = offset & (~0xfff * GET_MODE_SIZE (mode)); if (base_offset != 0) { |