diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.c')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 201c2fb5cda..4f095a26207 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -1213,6 +1213,7 @@ static bool rs6000_can_eliminate (const int, const int); static void rs6000_conditional_register_usage (void); static void rs6000_trampoline_init (rtx, tree, rtx); static bool rs6000_cannot_force_const_mem (enum machine_mode, rtx); +static bool rs6000_legitimate_constant_p (enum machine_mode, rtx); /* Hash table stuff for keeping track of TOC entries. */ @@ -1670,6 +1671,9 @@ static const struct default_options rs6000_option_optimization_table[] = #undef TARGET_SET_CURRENT_FUNCTION #define TARGET_SET_CURRENT_FUNCTION rs6000_set_current_function +#undef TARGET_LEGITIMATE_CONSTANT_P +#define TARGET_LEGITIMATE_CONSTANT_P rs6000_legitimate_constant_p + struct gcc_target targetm = TARGET_INITIALIZER; @@ -28275,5 +28279,22 @@ rs6000_address_for_altivec (rtx x) return x; } +/* Implement TARGET_LEGITIMATE_CONSTANT_P. + + On the RS/6000, all integer constants are acceptable, most won't be valid + for particular insns, though. Only easy FP constants are acceptable. */ + +static bool +rs6000_legitimate_constant_p (enum machine_mode mode, rtx x) +{ + if (rs6000_tls_referenced_p (x)) + return false; + + return ((GET_CODE (x) != CONST_DOUBLE && GET_CODE (x) != CONST_VECTOR) + || GET_MODE (x) == VOIDmode + || (TARGET_POWERPC64 && mode == DImode) + || easy_fp_constant (x, mode) + || easy_vector_constant (x, mode)); +} #include "gt-rs6000.h" |
