https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108707#c9
>Pranav Gorantla 2025-02-06 04:30:05 UTC
>Facing similar issue in gcc-13. Is it possible to backport the fix of this Bug
>108707 and Bug 109610 to gcc-13, gcc-12 as well.
This series is to ask approval for the backport of r14-172 and r14-1252 to
GCC13 and GCC12 release branch.
Note r14-1252 is a fix to r14-172 which regressed powerpc testcase in PR109610.
I have verified the fix also works on GCC13/GCC12 branch for PR109610.
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}, and aarch64-linux-gnu.
Ok for backport
liuhongt (3):
Use NO_REGS in cost calculation when the preferred register class are
not known yet.
Only use NO_REGS in cost calculation when !hard_regno_mode_ok for
GENERAL_REGS and mode.
Adjust testcases after better RA decision.
gcc/ira-costs.cc | 7 +
.../i386/avx2-dest-false-dep-for-glc.c | 28 +-
.../i386/avx512dq-dest-false-dep-for-glc.c | 257 ++++++++++---
.../i386/avx512f-dest-false-dep-for-glc.c | 348 ++++++++++++++----
.../i386/avx512fp16-dest-false-dep-for-glc.c | 118 ++++--
.../i386/avx512vl-dest-false-dep-for-glc.c | 243 +++++++++---
gcc/testsuite/gcc.target/i386/pr108707.c | 16 +
7 files changed, 813 insertions(+), 204 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/i386/pr108707.c
--
2.34.1
