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| author | Xi Ruoyao <xry111@xry111.site> | 2023-09-05 19:42:30 +0800 |
|---|---|---|
| committer | Xi Ruoyao <xry111@xry111.site> | 2023-09-07 15:53:25 +0800 |
| commit | 5b857e87201335148f23ec7134cf7fbf97c04c72 (patch) | |
| tree | 84206204a94fa7a479dced08c34df28705cf8dc5 /contrib/gcc-changelog/git_email.py | |
| parent | b1ca841b8972e546570553df3e61326c86135404 (diff) | |
| download | gcc-5b857e87201335148f23ec7134cf7fbf97c04c72.zip gcc-5b857e87201335148f23ec7134cf7fbf97c04c72.tar.gz gcc-5b857e87201335148f23ec7134cf7fbf97c04c72.tar.bz2 | |
LoongArch: Use bstrins instruction for (a & ~mask) and (a & mask) | (b & ~mask) [PR111252]
If mask is a constant with value ((1 << N) - 1) << M we can perform this
optimization.
gcc/ChangeLog:
PR target/111252
* config/loongarch/loongarch-protos.h
(loongarch_pre_reload_split): Declare new function.
(loongarch_use_bstrins_for_ior_with_mask): Likewise.
* config/loongarch/loongarch.cc
(loongarch_pre_reload_split): Implement.
(loongarch_use_bstrins_for_ior_with_mask): Likewise.
* config/loongarch/predicates.md (ins_zero_bitmask_operand):
New predicate.
* config/loongarch/loongarch.md (bstrins_<mode>_for_mask):
New define_insn_and_split.
(bstrins_<mode>_for_ior_mask): Likewise.
(define_peephole2): Further optimize code sequence produced by
bstrins_<mode>_for_ior_mask if possible.
gcc/testsuite/ChangeLog:
* g++.target/loongarch/bstrins-compile.C: New test.
* g++.target/loongarch/bstrins-run.C: New test.
Diffstat (limited to 'contrib/gcc-changelog/git_email.py')
0 files changed, 0 insertions, 0 deletions