diff options
Diffstat (limited to 'gcc/varasm.cc')
| -rw-r--r-- | gcc/varasm.cc | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/gcc/varasm.cc b/gcc/varasm.cc index 8266282..000ad9e 100644 --- a/gcc/varasm.cc +++ b/gcc/varasm.cc @@ -871,7 +871,7 @@ mergeable_string_section (tree decl ATTRIBUTE_UNUSED, if (HAVE_GAS_SHF_MERGE && flag_merge_constants && TREE_CODE (decl) == STRING_CST && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE - && align <= 256 + && align <= MAX_ALIGN_MERGABLE && (len = int_size_in_bytes (TREE_TYPE (decl))) > 0 && TREE_STRING_LENGTH (decl) == len) { @@ -885,7 +885,7 @@ mergeable_string_section (tree decl ATTRIBUTE_UNUSED, mode = SCALAR_INT_TYPE_MODE (TREE_TYPE (TREE_TYPE (decl))); modesize = GET_MODE_BITSIZE (mode); - if (modesize >= 8 && modesize <= 256 + if (modesize >= 8 && modesize <= MAX_ALIGN_MERGABLE && (modesize & (modesize - 1)) == 0) { if (align < modesize) @@ -919,16 +919,14 @@ mergeable_string_section (tree decl ATTRIBUTE_UNUSED, /* Return the section to use for constant merging. */ section * -mergeable_constant_section (machine_mode mode ATTRIBUTE_UNUSED, - unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED, - unsigned int flags ATTRIBUTE_UNUSED) +mergeable_constant_section (unsigned HOST_WIDE_INT size_bits, + unsigned HOST_WIDE_INT align, + unsigned int flags) { if (HAVE_GAS_SHF_MERGE && flag_merge_constants - && mode != VOIDmode - && mode != BLKmode - && known_le (GET_MODE_BITSIZE (mode), align) + && size_bits <= align && align >= 8 - && align <= 256 + && align <= MAX_ALIGN_MERGABLE && (align & (align - 1)) == 0) { const char *prefix = function_mergeable_rodata_prefix (); @@ -940,6 +938,38 @@ mergeable_constant_section (machine_mode mode ATTRIBUTE_UNUSED, } return readonly_data_section; } + + +/* Return the section to use for constant merging. Like the above + but the size stored as a tree. */ +static section * +mergeable_constant_section (tree size_bits, + unsigned HOST_WIDE_INT align, + unsigned int flags) +{ + if (!size_bits || !tree_fits_uhwi_p (size_bits)) + return readonly_data_section; + return mergeable_constant_section (tree_to_uhwi (size_bits), align, flags); +} + + +/* Return the section to use for constant merging. Like the above + but given a mode rather than the size. */ + +section * +mergeable_constant_section (machine_mode mode, + unsigned HOST_WIDE_INT align, + unsigned int flags) +{ + /* If the mode is unknown (BLK or VOID), then return a non mergable section. */ + if (mode == BLKmode || mode == VOIDmode) + return readonly_data_section; + unsigned HOST_WIDE_INT size; + if (!GET_MODE_BITSIZE (mode).is_constant (&size)) + return readonly_data_section; + return mergeable_constant_section (size, align, flags); +} + /* Given NAME, a putative register name, discard any customary prefixes. */ @@ -7453,7 +7483,7 @@ default_elf_select_section (tree decl, int reloc, case SECCAT_RODATA_MERGE_STR_INIT: return mergeable_string_section (DECL_INITIAL (decl), align, 0); case SECCAT_RODATA_MERGE_CONST: - return mergeable_constant_section (DECL_MODE (decl), align, 0); + return mergeable_constant_section (DECL_SIZE (decl), align, 0); case SECCAT_SRODATA: sname = ".sdata2"; break; |