diff options
Diffstat (limited to 'gcc/config/avr/avr.c')
| -rw-r--r-- | gcc/config/avr/avr.c | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index fcfec61..0378012 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -71,6 +71,8 @@ static unsigned int avr_section_type_flags PARAMS ((tree, const char *, int)); static void avr_asm_out_ctor PARAMS ((rtx, int)); static void avr_asm_out_dtor PARAMS ((rtx, int)); +static int default_rtx_costs PARAMS ((rtx, enum rtx_code, enum rtx_code)); +static bool avr_rtx_costs PARAMS ((rtx, int, int, int *)); /* Allocate registers from r25 to r8 for parameters for function calls */ #define FIRST_CUM_REG 26 @@ -227,6 +229,8 @@ int avr_case_values_threshold = 30000; #define TARGET_ENCODE_SECTION_INFO avr_encode_section_info #undef TARGET_SECTION_TYPE_FLAGS #define TARGET_SECTION_TYPE_FLAGS avr_section_type_flags +#undef TARGET_RTX_COSTS +#define TARGET_RTX_COSTS avr_rtx_costs struct gcc_target targetm = TARGET_INITIALIZER; @@ -4978,7 +4982,7 @@ order_regs_for_local_alloc () /* Calculate the cost of X code of the expression in which it is contained, found in OUTER_CODE */ -int +static int default_rtx_costs (X, code, outer_code) rtx X; enum rtx_code code; @@ -5037,6 +5041,56 @@ default_rtx_costs (X, code, outer_code) return cost; } +static bool +avr_rtx_costs (x, code, outer_code, total) + rtx x; + int code, outer_code; + int *total; +{ + int cst; + + switch (code) + { + case CONST_INT: + if (outer_code == PLUS + || outer_code == IOR + || outer_code == AND + || outer_code == MINUS + || outer_code == SET + || INTVAL (x) == 0) + { + *total = 2; + return true; + } + if (outer_code == COMPARE + && INTVAL (x) >= 0 + && INTVAL (x) <= 255) + { + *total = 2; + return true; + } + /* FALLTHRU */ + + case CONST: + case LABEL_REF: + case SYMBOL_REF: + case CONST_DOUBLE: + *total = 4; + return true; + + default: + cst = default_rtx_costs (x, code, outer_code); + if (cst > 0) + { + *total = cst; + return true; + } + else if (cst < 0) + *total += -cst; + return false; + } +} + /* Calculate the cost of a memory address */ int |