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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2017-10-26 16:34:03 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2017-10-26 16:34:03 +0000 |
| commit | 37e4d57b99efe65710bb4a000093c596ab3f5124 (patch) | |
| tree | c50f11ebc27468dce659470f8cae33c57099bdf4 /gcc/gimple.c | |
| parent | 9eaf97d6d7f1511638fb9209b7acf30e8f26a060 (diff) | |
| download | gcc-37e4d57b99efe65710bb4a000093c596ab3f5124.zip gcc-37e4d57b99efe65710bb4a000093c596ab3f5124.tar.gz gcc-37e4d57b99efe65710bb4a000093c596ab3f5124.tar.bz2 | |
Improve addressing of TI/TFmode
In https://gcc.gnu.org/ml/gcc-patches/2017-06/msg01125.html Jiong
pointed out some addressing inefficiencies due to a recent change in
regcprop (https://gcc.gnu.org/ml/gcc-patches/2017-04/msg00775.html).
This patch improves aarch64_legitimize_address_displacement to split
unaligned offsets of TImode and TFmode accesses. The resulting code
is better and no longer relies on the original regcprop optimization.
For the test we now produce:
add x1, sp, 4
stp xzr, xzr, [x1, 24]
rather than:
mov x1, sp
add x1, x1, 28
stp xzr, xzr, [x1]
gcc/
* config/aarch64/aarch64.c (aarch64_legitimize_address_displacement):
Improve unaligned TImode/TFmode base/offset split.
testsuite/
* gcc.target/aarch64/ldp_stp_unaligned_2.c: New file.
From-SVN: r254111
Diffstat (limited to 'gcc/gimple.c')
0 files changed, 0 insertions, 0 deletions