[Bug target/106096] [13 regression] ICE building stage 2 libgcc on loongarch64-linux-gnu because stage 2 gcc is miscompiled

cvs-commit at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Jun 28 11:03:22 GMT 2022


--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Xi Ruoyao <xry111@gcc.gnu.org>:


commit r13-1319-g020b7d98589bbc928b5a66b1ed56b42af8791355
Author: Xi Ruoyao <xry111@xry111.site>
Date:   Tue Jun 28 16:00:14 2022 +0800

    loongarch: exclude LARCH_PROLOGUE_TEMP from SIBCALL_REGS [PR 106096]

    The epilogue may clobber LARCH_PROLOGUE_TEMP ($r13/$t1), so it cannot be
    used for sibcalls.


            PR target/106096
            * config/loongarch/loongarch.h (REG_CLASS_CONTENTS): Exclude
            $r13 from SIBCALL_REGS.
            * config/loongarch/loongarch.cc (loongarch_regno_to_class):
            Change $r13 to JIRL_REGS.


            PR target/106096
            * g++.target/loongarch/loongarch.exp: New test support file.
            * g++.target/loongarch/pr106096.C: New test.

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