diff options
| -rw-r--r-- | gcc/config/xtensa/xtensa.cc | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc index 950eb5a..94a98c2 100644 --- a/gcc/config/xtensa/xtensa.cc +++ b/gcc/config/xtensa/xtensa.cc @@ -3471,15 +3471,14 @@ xtensa_expand_epilogue (bool sibcall_p) if (xtensa_call_save_reg(regno)) { rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); - rtx reg; offset -= UNITS_PER_WORD; - emit_move_insn (reg = gen_rtx_REG (SImode, regno), + emit_move_insn (gen_rtx_REG (SImode, regno), gen_frame_mem (SImode, x)); - if (regno == A0_REG && sibcall_p) - emit_use (reg); } } + if (sibcall_p) + emit_use (gen_rtx_REG (SImode, A0_REG)); if (cfun->machine->current_frame_size > 0) { @@ -4970,6 +4969,13 @@ xtensa_conditional_register_usage (void) /* Remove hard FP register from the preferred reload registers set. */ CLEAR_HARD_REG_BIT (reg_class_contents[(int)RL_REGS], HARD_FRAME_POINTER_REGNUM); + + /* Register A0 holds the return address upon entry to a function + for the CALL0 ABI, but unlike the windowed register ABI, it is + not reserved for this purpose and may hold other values after + the return address has been saved. */ + if (!TARGET_WINDOWED_ABI) + fixed_regs[A0_REG] = 0; } /* Map hard register number to register class */ |