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From: Michael Meissner <meissner@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/users/meissner/heads/work121)] Update ChangeLog.meissner Date: Fri, 12 May 2023 16:50:59 +0000 (GMT) [thread overview] Message-ID: <20230512165059.66C4D3852769@sourceware.org> (raw) https://gcc.gnu.org/g:819015381d3ee559ad9d835ec8d526a1d1ee89f1 commit 819015381d3ee559ad9d835ec8d526a1d1ee89f1 Author: Michael Meissner <meissner@linux.ibm.com> Date: Mon May 8 19:46:48 2023 -0400 Update ChangeLog.meissner Diff: --- gcc/ChangeLog.meissner | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner index 3658ec88e7f..e6965fbb1f7 100644 --- a/gcc/ChangeLog.meissner +++ b/gcc/ChangeLog.meissner @@ -1,3 +1,48 @@ +==================== Branch work121, patch #2 ==================== + +PR target/105325: Fix power10_fusion + +This patch applies stricter predicates and constraints for LD and LWA +instructions with power10 fusion. These instructions are DS-form instructions, +which means that the bottom 2 bits of the address must be 0. In the past, we +did not use the stricter predicates and constraints, and if the user used the +-fstack-protector option, it would generate a non-prefixed load instruction +whose offset was too big if the stack is large. + +2023-05-08 Michael Meissner <meissner@linux.ibm.com> + +gcc/ + + PR target/105325 + * config/rs6000/genfusion.pl (print_ld_cmpi_p10): Use "YZ" constraints + for DS-form loads. Set the sign_extend attribute for loads that do sign + extension. Use the lwa_operand predicator for the LWA instruction. + * config/rs6000/fusion.md: Regenerate. + +gcc/testsuite/ + + PR target/105325 + * g++.target/powerpc/pr105325.C: New test. + * gcc.target/powerpc/fusion-p10-ldcmpi.c: Adjust insn counts. + + +==================== Branch work121, patch #1 ==================== + +Rewrite genfusion.pl's gen_ld_cmpi_p10 function. + +This patch rewrites the gen_ld_cmpi_p10 function to be clearer. The resulting +fusion.md file is exactly the same in this patch. The next patch in this series +will fix PR target/105325. + +2023-05-08 Michael Meissner <meissner@linux.ibm.com> + +gcc/ + + PR target/105325 + * config/rs6000/genfusion.pl (print_ld_cmpi_p10): New function, split + off from gen_ld_cmpi_p10. + (gen_ld_cmpi_p10): Rewrite completely. + ==================== Branch work121, baseline ==================== 2023-05-08 Michael Meissner <meissner@linux.ibm.com>
next reply other threads:[~2023-05-12 16:50 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-05-12 16:50 Michael Meissner [this message] -- strict thread matches above, loose matches on Subject: below -- 2023-06-03 4:07 Michael Meissner 2023-06-02 19:14 Michael Meissner 2023-06-02 4:15 Michael Meissner 2023-05-18 5:13 Michael Meissner 2023-05-17 21:26 Michael Meissner 2023-05-15 23:31 Michael Meissner 2023-05-12 16:56 Michael Meissner 2023-05-12 16:51 Michael Meissner 2023-05-12 16:51 Michael Meissner 2023-05-09 20:45 Michael Meissner 2023-05-08 23:55 Michael Meissner 2023-05-08 23:46 Michael Meissner
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