diff options
Diffstat (limited to 'gcc/config/pa/pa.c')
| -rw-r--r-- | gcc/config/pa/pa.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c index ab0fe6a..e3260c4 100644 --- a/gcc/config/pa/pa.c +++ b/gcc/config/pa/pa.c @@ -188,6 +188,7 @@ static void pa_conditional_register_usage (void); static enum machine_mode pa_c_mode_for_suffix (char); static section *pa_function_section (tree, enum node_frequency, bool, bool); static bool pa_cannot_force_const_mem (enum machine_mode, rtx); +static bool pa_legitimate_constant_p (enum machine_mode, rtx); /* The following extra sections are only used for SOM. */ static GTY(()) section *som_readonly_data_section; @@ -397,6 +398,9 @@ static const struct default_options pa_option_optimization_table[] = #undef TARGET_ASM_FUNCTION_SECTION #define TARGET_ASM_FUNCTION_SECTION pa_function_section +#undef TARGET_LEGITIMATE_CONSTANT_P +#define TARGET_LEGITIMATE_CONSTANT_P pa_legitimate_constant_p + struct gcc_target targetm = TARGET_INITIALIZER; /* Parse the -mfixed-range= option string. */ @@ -10276,4 +10280,40 @@ pa_function_section (tree decl, enum node_frequency freq, return default_function_section (decl, freq, startup, exit); } +/* Implement TARGET_LEGITIMATE_CONSTANT_P. + + In 64-bit mode, we reject CONST_DOUBLES. We also reject CONST_INTS + that need more than three instructions to load prior to reload. This + limit is somewhat arbitrary. It takes three instructions to load a + CONST_INT from memory but two are memory accesses. It may be better + to increase the allowed range for CONST_INTS. We may also be able + to handle CONST_DOUBLES. */ + +static bool +pa_legitimate_constant_p (enum machine_mode mode, rtx x) +{ + if (GET_MODE_CLASS (mode) == MODE_FLOAT && x != CONST0_RTX (mode)) + return false; + + if (!NEW_HP_ASSEMBLER && !TARGET_GAS && GET_CODE (x) == LABEL_REF) + return false; + + if (TARGET_64BIT && GET_CODE (x) == CONST_DOUBLE) + return false; + + if (TARGET_64BIT + && HOST_BITS_PER_WIDE_INT > 32 + && GET_CODE (x) == CONST_INT + && !reload_in_progress + && !reload_completed + && !LEGITIMATE_64BIT_CONST_INT_P (INTVAL (x)) + && !cint_ok_for_move (INTVAL (x))) + return false; + + if (function_label_operand (x, mode)) + return false; + + return true; +} + #include "gt-pa.h" |