diff options
Diffstat (limited to 'gcc/config/mips/mips.c')
| -rw-r--r-- | gcc/config/mips/mips.c | 162 |
1 files changed, 11 insertions, 151 deletions
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c index 456db08..a4bb454 100644 --- a/gcc/config/mips/mips.c +++ b/gcc/config/mips/mips.c @@ -328,153 +328,6 @@ static struct { bool fast_mult_zero_zero_p; } mips_tuning_info; -/* Information about a function's frame layout. */ -struct GTY(()) mips_frame_info { - /* The size of the frame in bytes. */ - HOST_WIDE_INT total_size; - - /* The number of bytes allocated to variables. */ - HOST_WIDE_INT var_size; - - /* The number of bytes allocated to outgoing function arguments. */ - HOST_WIDE_INT args_size; - - /* The number of bytes allocated to the .cprestore slot, or 0 if there - is no such slot. */ - HOST_WIDE_INT cprestore_size; - - /* Bit X is set if the function saves or restores GPR X. */ - unsigned int mask; - - /* Likewise FPR X. */ - unsigned int fmask; - - /* Likewise doubleword accumulator X ($acX). */ - unsigned int acc_mask; - - /* The number of GPRs, FPRs, doubleword accumulators and COP0 - registers saved. */ - unsigned int num_gp; - unsigned int num_fp; - unsigned int num_acc; - unsigned int num_cop0_regs; - - /* The offset of the topmost GPR, FPR, accumulator and COP0-register - save slots from the top of the frame, or zero if no such slots are - needed. */ - HOST_WIDE_INT gp_save_offset; - HOST_WIDE_INT fp_save_offset; - HOST_WIDE_INT acc_save_offset; - HOST_WIDE_INT cop0_save_offset; - - /* Likewise, but giving offsets from the bottom of the frame. */ - HOST_WIDE_INT gp_sp_offset; - HOST_WIDE_INT fp_sp_offset; - HOST_WIDE_INT acc_sp_offset; - HOST_WIDE_INT cop0_sp_offset; - - /* Similar, but the value passed to _mcount. */ - HOST_WIDE_INT ra_fp_offset; - - /* The offset of arg_pointer_rtx from the bottom of the frame. */ - HOST_WIDE_INT arg_pointer_offset; - - /* The offset of hard_frame_pointer_rtx from the bottom of the frame. */ - HOST_WIDE_INT hard_frame_pointer_offset; -}; - -/* Enumeration for masked vectored (VI) and non-masked (EIC) interrupts. */ -enum mips_int_mask -{ - INT_MASK_EIC = -1, - INT_MASK_SW0 = 0, - INT_MASK_SW1 = 1, - INT_MASK_HW0 = 2, - INT_MASK_HW1 = 3, - INT_MASK_HW2 = 4, - INT_MASK_HW3 = 5, - INT_MASK_HW4 = 6, - INT_MASK_HW5 = 7 -}; - -/* Enumeration to mark the existence of the shadow register set. - SHADOW_SET_INTSTACK indicates a shadow register set with a valid stack - pointer. */ -enum mips_shadow_set -{ - SHADOW_SET_NO, - SHADOW_SET_YES, - SHADOW_SET_INTSTACK -}; - -struct GTY(()) machine_function { - /* The next floating-point condition-code register to allocate - for ISA_HAS_8CC targets, relative to ST_REG_FIRST. */ - unsigned int next_fcc; - - /* The register returned by mips16_gp_pseudo_reg; see there for details. */ - rtx mips16_gp_pseudo_rtx; - - /* The number of extra stack bytes taken up by register varargs. - This area is allocated by the callee at the very top of the frame. */ - int varargs_size; - - /* The current frame information, calculated by mips_compute_frame_info. */ - struct mips_frame_info frame; - - /* The register to use as the function's global pointer, or INVALID_REGNUM - if the function doesn't need one. */ - unsigned int global_pointer; - - /* How many instructions it takes to load a label into $AT, or 0 if - this property hasn't yet been calculated. */ - unsigned int load_label_num_insns; - - /* True if mips_adjust_insn_length should ignore an instruction's - hazard attribute. */ - bool ignore_hazard_length_p; - - /* True if the whole function is suitable for .set noreorder and - .set nomacro. */ - bool all_noreorder_p; - - /* True if the function has "inflexible" and "flexible" references - to the global pointer. See mips_cfun_has_inflexible_gp_ref_p - and mips_cfun_has_flexible_gp_ref_p for details. */ - bool has_inflexible_gp_insn_p; - bool has_flexible_gp_insn_p; - - /* True if the function's prologue must load the global pointer - value into pic_offset_table_rtx and store the same value in - the function's cprestore slot (if any). Even if this value - is currently false, we may decide to set it to true later; - see mips_must_initialize_gp_p () for details. */ - bool must_initialize_gp_p; - - /* True if the current function must restore $gp after any potential - clobber. This value is only meaningful during the first post-epilogue - split_insns pass; see mips_must_initialize_gp_p () for details. */ - bool must_restore_gp_when_clobbered_p; - - /* True if this is an interrupt handler. */ - bool interrupt_handler_p; - - /* Records the way in which interrupts should be masked. Only used if - interrupts are not kept masked. */ - enum mips_int_mask int_mask; - - /* Records if this is an interrupt handler that uses shadow registers. */ - enum mips_shadow_set use_shadow_register_set; - - /* True if this is an interrupt handler that should keep interrupts - masked. */ - bool keep_interrupts_masked_p; - - /* True if this is an interrupt handler that should use DERET - instead of ERET. */ - bool use_debug_exception_return_p; -}; - /* Information about a single argument. */ struct mips_arg_info { /* True if the argument is passed in a floating-point register, or @@ -10504,10 +10357,15 @@ mips_compute_frame_info (void) cfun->machine->global_pointer = mips_global_pointer (); /* The first two blocks contain the outgoing argument area and the $gp save - slot. This area isn't needed in leaf functions, but if the - target-independent frame size is nonzero, we have already committed to - allocating these in STARTING_FRAME_OFFSET for !FRAME_GROWS_DOWNWARD. */ - if ((size == 0 || FRAME_GROWS_DOWNWARD) && crtl->is_leaf) + slot. This area isn't needed in leaf functions. We can also skip it + if we know that none of the called functions will use this space. + + But if the target-independent frame size is nonzero, we have already + committed to allocating these in STARTING_FRAME_OFFSET for + !FRAME_GROWS_DOWNWARD. */ + + if ((size == 0 || FRAME_GROWS_DOWNWARD) + && (crtl->is_leaf || (cfun->machine->optimize_call_stack && !flag_pic))) { /* The MIPS 3.0 linker does not like functions that dynamically allocate the stack and have 0 for STACK_DYNAMIC_OFFSET, since it @@ -18269,6 +18127,8 @@ mips_option_override (void) if (TARGET_HARD_FLOAT_ABI && TARGET_MIPS5900) REAL_MODE_FORMAT (SFmode) = &spu_single_format; + + mips_register_frame_header_opt (); } /* Swap the register information for registers I and I + 1, which |