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| author | Jakub Jelinek <jakub@redhat.com> | 2024-12-07 11:40:12 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2024-12-07 11:40:12 +0100 |
| commit | 4abcf4ad38a4081f02ed09aed7892a3a6af61cbb (patch) | |
| tree | 94b2bcfd114b3960a2879b18419d6b8f769c10c7 /libcpp/include/cpplib.h | |
| parent | b7dd0d976022c5ba20d9d676e2f684614231eb72 (diff) | |
| download | gcc-4abcf4ad38a4081f02ed09aed7892a3a6af61cbb.zip gcc-4abcf4ad38a4081f02ed09aed7892a3a6af61cbb.tar.gz gcc-4abcf4ad38a4081f02ed09aed7892a3a6af61cbb.tar.bz2 | |
i386: x r<< (c - y) to x r>> y etc. optimization [PR117930]
The following patch optimizes x r<< (c - y) to x r>> y,
x r>> (c - y) to x r<< y, x r<< (c + y) to x r<< y and
x r>> (c + y) to x r>> y if c is a multiple of x's bitsize.
2024-12-07 Jakub Jelinek <jakub@redhat.com>
PR target/117930
* config/i386/i386.md (crotate): New define_code_attr.
(*<insn><mode>3_add, *<insn><mode>3_add_1,
*<insn><mode>3_sub, *<insn><mode>3_sub_1): New define_insn_and_split
patterns plus following define_split for constant first input
operand.
* gcc.target/i386/pr117930.c: New test.
Diffstat (limited to 'libcpp/include/cpplib.h')
0 files changed, 0 insertions, 0 deletions