On Wed, Jul 19, 2023 at 2:21 PM Richard Biener
<richard.guent...@gmail.com> wrote:
>
> On Sun, Jun 11, 2023 at 12:55 AM Roger Sayle <ro...@nextmovesoftware.com>
> wrote:
> >
> >
> > This is a backport of the fixes for PR target/109973 and PR target/110083.
> >
> > This backport to the releases/gcc-13 branch has been tested on
> > x86_64-pc-linux-gnu with make bootstrap and make -k check, both with and
> > without --target_board=unix{-m32} with no new failures. Ok for gcc-13,
> > or should we just close PR 109973 in Bugzilla?
>
> As alternative solution for the GCC 13 branch I have tested reverting
> r13-2006-ga56c1641e9d25e successfully. Can we choose between the
> options please? Sorry I'm only bringing this up now but 13.2 RC is due
> tomorrow.
>
> Thank you,
> Richard.
>
> >
> >
> > 2023-06-10 Roger Sayle <ro...@nextmovesoftware.com>
> > Uros Bizjak <ubiz...@gmail.com>
> >
> > gcc/ChangeLog
> > PR target/109973
> > PR target/110083
> > * config/i386/i386-builtin.def (__builtin_ia32_ptestz128): Use new
> > CODE_for_sse4_1_ptestzv2di.
> > (__builtin_ia32_ptestc128): Use new CODE_for_sse4_1_ptestcv2di.
> > (__builtin_ia32_ptestz256): Use new CODE_for_avx_ptestzv4di.
> > (__builtin_ia32_ptestc256): Use new CODE_for_avx_ptestcv4di.
> > * config/i386/i386-expand.cc (ix86_expand_branch): Use CCZmode
> > when expanding UNSPEC_PTEST to compare against zero.
> > * config/i386/i386-features.cc (scalar_chain::convert_compare):
> > Likewise generate CCZmode UNSPEC_PTESTs when converting comparisons.
> > Update or delete REG_EQUAL notes, converting CONST_INT and
> > CONST_WIDE_INT immediate operands to a suitable CONST_VECTOR.
> > (general_scalar_chain::convert_insn): Use CCZmode for COMPARE
> > result.
> > (timode_scalar_chain::convert_insn): Use CCZmode for COMPARE result.
> > * config/i386/i386-protos.h (ix86_match_ptest_ccmode): Prototype.
> > * config/i386/i386.cc (ix86_match_ptest_ccmode): New predicate to
> > check for suitable matching modes for the UNSPEC_PTEST pattern.
> > * config/i386/sse.md (define_split): When splitting UNSPEC_MOVMSK
> > to UNSPEC_PTEST, preserve the FLAG_REG mode as CCZ.
> > (*<sse4_1>_ptest<mode>): Add asterisk to hide define_insn. Remove
> > ":CC" mode of FLAGS_REG, instead use ix86_match_ptest_ccmode.
> > (<sse4_1>_ptestz<mode>): New define_expand to specify CCZ.
> > (<sse4_1>_ptestc<mode>): New define_expand to specify CCC.
> > (<sse4_1>_ptest<mode>): A define_expand using CC to preserve the
> > current behavior.
> > (*ptest<mode>_and): Specify CCZ to only perform this optimization
> > when only the Z flag is required.
> >
> > gcc/testsuite/ChangeLog
> > PR target/109973
> > PR target/110083
> > * gcc.target/i386/pr109973-1.c: New test case.
> > * gcc.target/i386/pr109973-2.c: Likewise.
> > * gcc.target/i386/pr110083.c: Likewise.
Yes, I would rather have the offending patch reverted on gcc-13.
Uros.
