diff options
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 52 |
1 files changed, 21 insertions, 31 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 27a1eba..f9a28e7 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -291,19 +291,19 @@ finalize_size_functions (void) vec_free (size_functions); } -/* Return the machine mode to use for a nonscalar of SIZE bits. The - mode must be in class MCLASS, and have exactly that many value bits; - it may have padding as well. If LIMIT is nonzero, modes of wider - than MAX_FIXED_MODE_SIZE will not be used. */ +/* Return a machine mode of class MCLASS with SIZE bits of precision, + if one exists. The mode may have padding bits as well the SIZE + value bits. If LIMIT is nonzero, disregard modes wider than + MAX_FIXED_MODE_SIZE. */ -machine_mode +opt_machine_mode mode_for_size (unsigned int size, enum mode_class mclass, int limit) { machine_mode mode; int i; if (limit && size > MAX_FIXED_MODE_SIZE) - return BLKmode; + return opt_machine_mode (); /* Get the first mode which has this size, in the specified class. */ FOR_EACH_MODE_IN_CLASS (mode, mclass) @@ -316,7 +316,7 @@ mode_for_size (unsigned int size, enum mode_class mclass, int limit) && int_n_enabled_p[i]) return int_n_data[i].m; - return BLKmode; + return opt_machine_mode (); } /* Similar, except passed a tree node. */ @@ -333,11 +333,11 @@ mode_for_size_tree (const_tree size, enum mode_class mclass, int limit) ui = uhwi; if (uhwi != ui) return BLKmode; - return mode_for_size (ui, mclass, limit); + return mode_for_size (ui, mclass, limit).else_blk (); } -/* Similar, but never return BLKmode; return the narrowest mode that - contains at least the requested number of value bits. */ +/* Return the narrowest mode of class MCLASS that contains at least + SIZE bits. Abort if no such mode exists. */ machine_mode smallest_mode_for_size (unsigned int size, enum mode_class mclass) @@ -426,9 +426,8 @@ bitwise_mode_for_mode (machine_mode mode) if (COMPLEX_MODE_P (mode)) { machine_mode trial = mode; - if (GET_MODE_CLASS (mode) != MODE_COMPLEX_INT) - trial = mode_for_size (bitsize, MODE_COMPLEX_INT, false); - if (trial != BLKmode + if ((GET_MODE_CLASS (trial) == MODE_COMPLEX_INT + || mode_for_size (bitsize, MODE_COMPLEX_INT, false).exists (&trial)) && have_regs_of_mode[GET_MODE_INNER (trial)]) return trial; } @@ -438,16 +437,15 @@ bitwise_mode_for_mode (machine_mode mode) if (VECTOR_MODE_P (mode) || bitsize > MAX_FIXED_MODE_SIZE) { machine_mode trial = mode; - if (GET_MODE_CLASS (mode) != MODE_VECTOR_INT) - trial = mode_for_size (bitsize, MODE_VECTOR_INT, 0); - if (trial != BLKmode + if ((GET_MODE_CLASS (trial) == MODE_VECTOR_INT + || mode_for_size (bitsize, MODE_VECTOR_INT, 0).exists (&trial)) && have_regs_of_mode[trial] && targetm.vector_mode_supported_p (trial)) return trial; } /* Otherwise fall back on integers while honoring MAX_FIXED_MODE_SIZE. */ - return mode_for_size (bitsize, MODE_INT, true); + return mode_for_size (bitsize, MODE_INT, true).else_blk (); } /* Find a type that can be used for efficient bitwise operations on MODE. @@ -2543,13 +2541,9 @@ make_fract_type (int precision, int unsignedp, int satp) TYPE_SATURATING (type) = 1; /* Lay out the type: set its alignment, size, etc. */ - if (unsignedp) - { - TYPE_UNSIGNED (type) = 1; - SET_TYPE_MODE (type, mode_for_size (precision, MODE_UFRACT, 0)); - } - else - SET_TYPE_MODE (type, mode_for_size (precision, MODE_FRACT, 0)); + TYPE_UNSIGNED (type) = unsignedp; + enum mode_class mclass = unsignedp ? MODE_UFRACT : MODE_FRACT; + SET_TYPE_MODE (type, mode_for_size (precision, mclass, 0).require ()); layout_type (type); return type; @@ -2569,13 +2563,9 @@ make_accum_type (int precision, int unsignedp, int satp) TYPE_SATURATING (type) = 1; /* Lay out the type: set its alignment, size, etc. */ - if (unsignedp) - { - TYPE_UNSIGNED (type) = 1; - SET_TYPE_MODE (type, mode_for_size (precision, MODE_UACCUM, 0)); - } - else - SET_TYPE_MODE (type, mode_for_size (precision, MODE_ACCUM, 0)); + TYPE_UNSIGNED (type) = unsignedp; + enum mode_class mclass = unsignedp ? MODE_UACCUM : MODE_ACCUM; + SET_TYPE_MODE (type, mode_for_size (precision, mclass, 0).require ()); layout_type (type); return type; |