From 3599dfbaa22b95ecabd3da9ba68ad4bb4f1124a4 Mon Sep 17 00:00:00 2001 From: Andrew Burgess Date: Wed, 16 Oct 2019 22:01:25 +0100 Subject: [PATCH] RISC-V: Include more registers in SIBCALL_REGS. 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. 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. Co-Authored-By: Jim Wilson From-SVN: r277082 --- gcc/ChangeLog | 8 ++++++++ gcc/config/riscv/riscv.c | 6 +++--- gcc/config/riscv/riscv.h | 2 +- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b81945b6eb2..5c56e0abfb9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2019-10-16 Andrew Burgess + Jim Wilson + + * 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. + 2019-10-16 Martin Sebor PR tree-optimization/83821 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 */ \ -- 2.30.2