* Jim Wilson <j...@sifive.com> [2019-10-16 14:04:45 -0700]:
> This finishes the part 1 of 2 patch submitted by Andrew Burgess on Aug 19.
> This adds the argument registers but not t0 (aka x5) to SIBCALL_REGS. It
> also adds the missing riscv_regno_to_class change.
>
> Tested with cross riscv32-elf and riscv64-linux toolchain build and check.
> There were no regressions. I see about a 0.01% code size reduction for the
> C and libstdc++ libraries.
>
> Committed.
Thanks for doing this Jim.
I'm still working on part 2, I'm hoping to have a revised patch posted
by Monday next week.
Thanks again,
Andrew
>
> Jim
>
> gcc/
> * config/riscv/riscv.h (REG_CLASS_CONTENTS): Add argument passing
> regs to SIBCALL_REGS.
> * config/riscv/riscv.c (riscv_regno_to_class): Change argument
> passing regs to SIBCALL_REGS.
> ---
> gcc/config/riscv/riscv.c | 6 +++---
> gcc/config/riscv/riscv.h | 2 +-
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
> index b8a8778b92c..77a3ad94aa8 100644
> --- a/gcc/config/riscv/riscv.c
> +++ b/gcc/config/riscv/riscv.c
> @@ -256,9 +256,9 @@ enum riscv_microarchitecture_type riscv_microarchitecture;
> const enum reg_class riscv_regno_to_class[FIRST_PSEUDO_REGISTER] = {
> GR_REGS, GR_REGS, GR_REGS, GR_REGS,
> GR_REGS, GR_REGS, SIBCALL_REGS, SIBCALL_REGS,
> - JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
> - JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
> - JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
> + JALR_REGS, JALR_REGS, SIBCALL_REGS, SIBCALL_REGS,
> + SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS,
> + SIBCALL_REGS, SIBCALL_REGS, JALR_REGS, JALR_REGS,
> JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
> JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
> SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS,
> diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
> index 5fc9be8edbf..246494663f6 100644
> --- a/gcc/config/riscv/riscv.h
> +++ b/gcc/config/riscv/riscv.h
> @@ -400,7 +400,7 @@ enum reg_class
> #define REG_CLASS_CONTENTS \
> { \
> { 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
> - { 0xf00000c0, 0x00000000, 0x00000000 }, /* SIBCALL_REGS */ \
> + { 0xf003fcc0, 0x00000000, 0x00000000 }, /* SIBCALL_REGS */ \
> { 0xffffffc0, 0x00000000, 0x00000000 }, /* JALR_REGS */ \
> { 0xffffffff, 0x00000000, 0x00000000 }, /* GR_REGS */ \
> { 0x00000000, 0xffffffff, 0x00000000 }, /* FP_REGS */ \
> --
> 2.17.1
>
