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| author | Jakub Jelinek <jakub@redhat.com> | 2020-11-24 10:45:40 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-11-24 10:45:40 +0100 |
| commit | a1dd66b108cba086f58448ccbe9bf57b0a342f9a (patch) | |
| tree | 99ce7ab0567e177ed2422f49194689e11ee76b15 /gcc/ada/doc | |
| parent | 4adfcea0a1b0c6dcaefddca3d5f45dd5403b1a80 (diff) | |
| download | gcc-a1dd66b108cba086f58448ccbe9bf57b0a342f9a.zip gcc-a1dd66b108cba086f58448ccbe9bf57b0a342f9a.tar.gz gcc-a1dd66b108cba086f58448ccbe9bf57b0a342f9a.tar.bz2 | |
i386: Add *setcc_hi_1* define_insn_and_split [PR97950]
As the following testcase shows, unlike char, int or long long sized
__builtin_*_overflow{,_p}, for short sized one in most cases the ce1 pass
doesn't optimize the jo/jno or jc/jnc jumps with setting of a pseudo to 0/1
into seto/setc. The reason is missing *setcc_hi_1* pattern. The following
patch implements it using mode iterators so that on i486 and pentium?
one can get the zero extension through and instead of movzbw.
2020-11-24 Jakub Jelinek <jakub@redhat.com>
PR target/97950
* config/i386/i386.md (*setcc_si_1_and): Macroize into...
(*setcc_<mode>_1_and): New define_insn_and_split with SWI24 iterator.
(*setcc_si_1_movzbl): Macroize into...
(*setcc_<mode>_1_movzbl): New define_insn_and_split with SWI24
iterator.
* gcc.target/i386/pr97950.c: New test.
Diffstat (limited to 'gcc/ada/doc')
0 files changed, 0 insertions, 0 deletions