X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbegnuas.c;h=72b46aa3e86826272814e3e2b1d70c8efe01f934;hb=67e049d5b177416c8883bbf8f827827bb424126f;hp=b7baf711fc24359d4e505ee4c98ad2ba96668efd;hpb=d6c7b2150b8e7aa199889a4725204e9ea9bc875e;p=libfirm diff --git a/ir/be/begnuas.c b/ir/be/begnuas.c index b7baf711f..72b46aa3e 100644 --- a/ir/be/begnuas.c +++ b/ir/be/begnuas.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -39,6 +39,7 @@ #include "irprog.h" #include "entity_t.h" #include "error.h" +#include "util.h" #include "be_t.h" #include "beemitter.h" @@ -57,22 +58,119 @@ static be_gas_section_t current_section = (be_gas_section_t) -1; * write it to the disk. This is an artifact from the old C-generating backend * and even there NOT needed. So we might change it in the future. */ -typedef struct _be_gas_decl_env { +typedef struct be_gas_decl_env { be_gas_section_t section; const be_main_env_t *main_env; } be_gas_decl_env_t; +static void emit_section_macho(be_gas_section_t section) +{ + be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; + be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; + const char *name; + + if (current_section == section) + return; + current_section = section; + + /* shortforms */ + if (flags == 0) { + switch (base) { + case GAS_SECTION_TEXT: name = "text"; break; + case GAS_SECTION_DATA: name = "data"; break; + case GAS_SECTION_RODATA: name = "const"; break; + case GAS_SECTION_BSS: name = "data"; break; + case GAS_SECTION_CONSTRUCTORS: name = "mod_init_func"; break; + case GAS_SECTION_DESTRUCTORS: name = "mod_term_func"; break; + case GAS_SECTION_PIC_TRAMPOLINES: name = "section\t__IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5"; break; + case GAS_SECTION_PIC_SYMBOLS: name = "section\t__IMPORT,__pointers,non_lazy_symbol_pointers"; break; + case GAS_SECTION_CSTRING: name = "cstring"; break; + default: panic("unsupported scetion type 0x%X", section); + } + be_emit_irprintf("\t.%s\n", name); + be_emit_write_line(); + } else if (flags & GAS_SECTION_FLAG_COMDAT) { + switch (base) { + case GAS_SECTION_TEXT: name = "section __TEXT,__textcoal_nt,coalesced,pure_instructions"; break; + case GAS_SECTION_BSS: + case GAS_SECTION_DATA: name = "section __DATA,__datacoal_nt,coalesced"; break; + case GAS_SECTION_RODATA: name = "section __TEXT,__const_coal,coalesced"; break; + case GAS_SECTION_CSTRING: name = "section __TEXT,__const_coal,coalesced"; break; + default: panic("unsupported scetion type 0x%X", section); + } + } else { + panic("unsupported section type 0x%X\n", section); + } +} + +static void emit_section_sparc(be_gas_section_t section, const ir_entity *entity) +{ + be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; + be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; + static const char *const basename[] = { + "text", "data", "rodata", "bss", "ctors", "dtors" + }; + + if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT)) + return; + current_section = section; + + be_emit_cstring("\t.section\t\"."); + + /* Part1: section-name */ + if (flags & GAS_SECTION_FLAG_TLS) + be_emit_char('t'); + assert(base < (be_gas_section_t)ARRAY_SIZE(basename)); + be_emit_string(basename[base]); + + if (flags & GAS_SECTION_FLAG_COMDAT) { + be_emit_char('.'); + be_gas_emit_entity(entity); + } + be_emit_char('"'); + + /* for the simple sections we're done here */ + if (flags == 0) + goto end; + + be_emit_cstring(",#alloc"); + + switch (base) { + case GAS_SECTION_TEXT: be_emit_cstring(",#execinstr"); break; + case GAS_SECTION_DATA: + case GAS_SECTION_BSS: be_emit_cstring(",#write"); break; + default: + /* nothing */ + break; + } + if (flags & GAS_SECTION_FLAG_TLS) { + be_emit_cstring(",#tls"); + } + +end: + be_emit_char('\n'); + be_emit_write_line(); +} + static void emit_section(be_gas_section_t section, const ir_entity *entity) { be_gas_section_t base = section & GAS_SECTION_TYPE_MASK; be_gas_section_t flags = section & ~GAS_SECTION_TYPE_MASK; - static const char *basename[] = { + static const char *const basename[] = { "text", "data", "rodata", "bss", "ctors", "dtors" }; - static const char *type[] = { - "", "progbits", "progbits", "nobits", "init_array", "fini_array" + static const char *const type[] = { + "progbits", "progbits", "progbits", "nobits", "progbits", "progbits" }; + if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O) { + emit_section_macho(section); + return; + } else if(be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF_SPARC) { + emit_section_sparc(section, entity); + return; + } + if (current_section == section && !(section & GAS_SECTION_FLAG_COMDAT)) return; current_section = section; @@ -101,7 +199,7 @@ static void emit_section(be_gas_section_t section, const ir_entity *entity) } } - assert(base < sizeof(basename)/sizeof(basename[0])); + assert(base < (be_gas_section_t) ARRAY_SIZE(basename)); be_emit_cstring("\t.section\t."); /* section name */ if (flags & GAS_SECTION_FLAG_TLS) @@ -116,15 +214,20 @@ static void emit_section(be_gas_section_t section, const ir_entity *entity) be_emit_cstring(",\""); if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) be_emit_char('a'); - if (base != GAS_SECTION_RODATA) + if (base == GAS_SECTION_TEXT) + be_emit_char('x'); + if (base != GAS_SECTION_RODATA && base != GAS_SECTION_TEXT) be_emit_char('w'); if (flags & GAS_SECTION_FLAG_TLS) be_emit_char('T'); if (flags & GAS_SECTION_FLAG_COMDAT) be_emit_char('G'); - be_emit_cstring("\","); - be_emit_char(be_gas_elf_type_char); - be_emit_string(type[base]); + /* section type */ + if (be_gas_object_file_format != OBJECT_FILE_FORMAT_COFF) { + be_emit_cstring("\","); + be_emit_char(be_gas_elf_type_char); + be_emit_string(type[base]); + } if (flags & GAS_SECTION_FLAG_COMDAT) { be_emit_char(','); @@ -135,6 +238,8 @@ static void emit_section(be_gas_section_t section, const ir_entity *entity) be_emit_write_line(); } + + void be_gas_emit_switch_section(be_gas_section_t section) { /* you have to produce a switch_section call with entity manually @@ -144,41 +249,53 @@ void be_gas_emit_switch_section(be_gas_section_t section) emit_section(section, NULL); } -static int initializer_is_string_const(const ir_initializer_t *initializer) +static ir_tarval *get_initializer_tarval(const ir_initializer_t *initializer) +{ + if (initializer->kind == IR_INITIALIZER_TARVAL) + return initializer->tarval.value; + if (initializer->kind == IR_INITIALIZER_CONST) { + ir_node *node = initializer->consti.value; + if (is_Const(node)) { + return get_Const_tarval(node); + } + } + return get_tarval_undefined(); +} + +static bool initializer_is_string_const(const ir_initializer_t *initializer) { size_t i, len; - int found_printable = 0; + bool found_printable = false; if (initializer->kind != IR_INITIALIZER_COMPOUND) - return 0; + return false; len = initializer->compound.n_initializers; if (len < 1) - return 0; + return false; for (i = 0; i < len; ++i) { int c; - tarval *tv; + ir_tarval *tv; ir_mode *mode; ir_initializer_t *sub_initializer = initializer->compound.initializers[i]; - if (sub_initializer->kind != IR_INITIALIZER_TARVAL) - return 0; + tv = get_initializer_tarval(sub_initializer); + if (!tarval_is_constant(tv)) + return false; - tv = sub_initializer->tarval.value; mode = get_tarval_mode(tv); - if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8) - return 0; + return false; c = get_tarval_long(tv); if (isgraph(c) || isspace(c)) - found_printable = 1; + found_printable = true; else if (c != 0) - return 0; + return false; if (i == len - 1 && c != '\0') - return 0; + return false; } return found_printable; @@ -190,7 +307,7 @@ static bool initializer_is_null(const ir_initializer_t *initializer) case IR_INITIALIZER_NULL: return true; case IR_INITIALIZER_TARVAL: { - tarval *tv = initializer->tarval.value; + ir_tarval *tv = initializer->tarval.value; return tarval_is_null(tv); } case IR_INITIALIZER_CONST: { @@ -276,6 +393,7 @@ static bool entity_is_null(const ir_entity *entity) } else if (entity_has_compound_ent_values(entity)) { /* I'm too lazy to implement this case as compound graph paths will be * remove anyway in the future */ + return false; } /* uninitialized, NULL is fine */ return true; @@ -336,6 +454,11 @@ static be_gas_section_t determine_section(be_gas_decl_env_t *env, return section | GAS_SECTION_FLAG_TLS; } + /* the java frontend keeps some functions inside classes */ + if (is_Class_type(owner)) { + return determine_basic_section(entity); + } + panic("Couldn't determine section for %+F?!?", entity); } @@ -366,7 +489,8 @@ static void emit_visibility(const ir_entity *entity) } if (be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O - && (linkage & IR_LINKAGE_HIDDEN_USER)) { + && (linkage & IR_LINKAGE_HIDDEN_USER) + && get_entity_ld_name(entity)[0] != '\0') { be_emit_cstring("\t.no_dead_strip "); be_gas_emit_entity(entity); be_emit_char('\n'); @@ -402,6 +526,7 @@ void be_gas_emit_function_prolog(const ir_entity *entity, unsigned po2alignment) switch (be_gas_object_file_format) { case OBJECT_FILE_FORMAT_ELF: + case OBJECT_FILE_FORMAT_ELF_SPARC: be_emit_cstring("\t.type\t"); be_gas_emit_entity(entity); be_emit_cstring(", "); @@ -446,15 +571,13 @@ void be_gas_emit_function_epilog(const ir_entity *entity) be_emit_write_line(); } -/************************************************************************/ - /** * Output a tarval. * * @param tv the tarval * @param bytes the width of the tarvals value in bytes */ -static void emit_arith_tarval(tarval *tv, int bytes) +static void emit_arith_tarval(ir_tarval *tv, int bytes) { switch (bytes) { case 1: @@ -515,14 +638,6 @@ static void emit_arith_tarval(tarval *tv, int bytes) panic("Can't dump a tarval with %d bytes", bytes); } -/** - * Return the label prefix for labeled blocks. - */ -const char *be_gas_block_label_prefix(void) -{ - return ".LG"; -} - /** * Return the label prefix for labeled instructions. */ @@ -538,7 +653,7 @@ const char *be_gas_insn_label_prefix(void) * * @return the tarval */ -static tarval *get_atomic_init_tv(ir_node *init) +static ir_tarval *get_atomic_init_tv(ir_node *init) { for (;;) { ir_mode *mode = get_irn_mode(init); @@ -590,7 +705,7 @@ static void do_emit_atomic_init(be_gas_decl_env_t *env, ir_node *init) { ir_mode *mode = get_irn_mode(init); int bytes = get_mode_size_bytes(mode); - tarval *tv; + ir_tarval *tv; ir_entity *ent; init = skip_Id(init); @@ -607,16 +722,12 @@ static void do_emit_atomic_init(be_gas_decl_env_t *env, ir_node *init) case iro_Const: tv = get_Const_tarval(init); - /* it's a arithmetic value */ + /* it's an arithmetic value */ emit_arith_tarval(tv, bytes); return; case iro_SymConst: switch (get_SymConst_kind(init)) { - case symconst_addr_name: - be_emit_ident(get_SymConst_name(init)); - break; - case symconst_addr_ent: ent = get_SymConst_entity(init); be_gas_emit_entity(ent); @@ -733,10 +844,6 @@ static void emit_atomic_init(be_gas_decl_env_t *env, ir_node *init) be_emit_write_line(); } -/************************************************************************/ -/* Routines to dump global variables */ -/************************************************************************/ - /** * Dump a string constant. * No checks are made!! @@ -789,11 +896,11 @@ static void emit_string_cst(const ir_entity *ent) remaining_space = type_size - len; assert(remaining_space >= 0); if (remaining_space > 0) { - be_emit_irprintf("\t.zero\t%d\n", remaining_space); + be_emit_irprintf("\t.space\t%d, 0\n", remaining_space); } } -static void emit_string_initializer(const ir_initializer_t *initializer) +static size_t emit_string_initializer(const ir_initializer_t *initializer) { size_t i, len; @@ -809,8 +916,8 @@ static void emit_string_initializer(const ir_initializer_t *initializer) const ir_initializer_t *sub_initializer = get_initializer_compound_value(initializer, i); - tarval *tv = get_initializer_tarval_value(sub_initializer); - int c = get_tarval_long(tv); + ir_tarval *tv = get_initializer_tarval(sub_initializer); + int c = get_tarval_long(tv); switch (c) { case '"' : be_emit_cstring("\\\""); break; @@ -828,20 +935,24 @@ static void emit_string_initializer(const ir_initializer_t *initializer) } be_emit_cstring("\"\n"); be_emit_write_line(); + + return initializer->compound.n_initializers; } -enum normal_or_bitfield_kind { +typedef enum normal_or_bitfield_kind { NORMAL = 0, TARVAL, + STRING, BITFIELD -}; +} normal_or_bitfield_kind; typedef struct { - enum normal_or_bitfield_kind kind; + normal_or_bitfield_kind kind; union { - ir_node *value; - tarval *tarval; - unsigned char bf_val; + ir_node *value; + ir_tarval *tarval; + unsigned char bf_val; + const ir_initializer_t *string; } v; } normal_or_bitfield; @@ -866,9 +977,9 @@ static size_t get_initializer_size(const ir_initializer_t *initializer, if (!is_type_variable_size(type)) { return get_type_size_bytes(type); } else { - unsigned n_entries + size_t n_entries = get_initializer_compound_n_entries(initializer); - unsigned i; + size_t i; unsigned initializer_size = get_type_size_bytes(type); for (i = 0; i < n_entries; ++i) { ir_entity *entity = get_compound_member(type, i); @@ -899,12 +1010,13 @@ static size_t max_vals; static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits, const ir_initializer_t *initializer, ir_type *type) { - unsigned char last_bits = 0; - ir_mode *mode = get_type_mode(type); - tarval *tv = NULL; - unsigned char curr_bits; - int value_len; - int j; + static const size_t BITS_PER_BYTE = 8; + ir_mode *mode = get_type_mode(type); + ir_tarval *tv = NULL; + int value_len; + size_t bit_offset; + size_t end; + bool big_endian = be_get_backend_param()->byte_order_big_endian; switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: @@ -928,22 +1040,41 @@ static void emit_bitfield(normal_or_bitfield *vals, size_t offset_bits, } tv = tarval_convert_to(tv, get_type_mode(type)); - /* normalize offset */ - vals += offset_bits >> 3; - offset_bits &= 7; - value_len = get_mode_size_bits(mode); - - /* combine bits with existing bits */ - for (j = 0; value_len + (int) offset_bits > 0; ++j) { - assert((size_t) (vals - glob_vals) + j < max_vals); - assert(vals[j].kind == BITFIELD || - (vals[j].kind == NORMAL && vals[j].v.value == NULL)); - vals[j].kind = BITFIELD; - curr_bits = get_tarval_sub_bits(tv, j); - vals[j].v.bf_val - |= (last_bits >> (8 - offset_bits)) | (curr_bits << offset_bits); - value_len -= 8; - last_bits = curr_bits; + value_len = get_type_size_bytes(get_primitive_base_type(type)); + bit_offset = 0; + end = get_mode_size_bits(mode); + while (bit_offset < end) { + size_t src_offset = bit_offset / BITS_PER_BYTE; + size_t src_offset_bits = bit_offset % BITS_PER_BYTE; + size_t dst_offset = (bit_offset+offset_bits) / BITS_PER_BYTE; + size_t dst_offset_bits = (bit_offset+offset_bits) % BITS_PER_BYTE; + size_t src_bits_len = end-bit_offset; + size_t dst_bits_len = BITS_PER_BYTE-dst_offset_bits; + unsigned char curr_bits; + normal_or_bitfield *val; + if (src_bits_len > dst_bits_len) + src_bits_len = dst_bits_len; + + if (big_endian) { + val = &vals[value_len - dst_offset - 1]; + } else { + val = &vals[dst_offset]; + } + + assert((val-glob_vals) < (ptrdiff_t) max_vals); + assert(val->kind == BITFIELD || + (val->kind == NORMAL && val->v.value == NULL)); + val->kind = BITFIELD; + curr_bits = get_tarval_sub_bits(tv, src_offset); + curr_bits = curr_bits >> src_offset_bits; + if (src_offset_bits + src_bits_len > 8) { + unsigned next_bits = get_tarval_sub_bits(tv, src_offset+1); + curr_bits |= next_bits << (8 - src_offset_bits); + } + curr_bits &= (1 << src_bits_len) - 1; + val->v.bf_val |= curr_bits << dst_offset_bits; + + bit_offset += dst_bits_len; } } @@ -953,6 +1084,13 @@ static void emit_ir_initializer(normal_or_bitfield *vals, { assert((size_t) (vals - glob_vals) < max_vals); + if (initializer_is_string_const(initializer)) { + assert(vals->kind != BITFIELD); + vals->kind = STRING; + vals->v.string = initializer; + return; + } + switch (get_initializer_kind(initializer)) { case IR_INITIALIZER_NULL: return; @@ -1020,14 +1158,14 @@ static void emit_ir_initializer(normal_or_bitfield *vals, if (mode != NULL) { size_t offset_bits = get_entity_offset_bits_remainder(member); - size_t value_len = get_mode_size_bits(mode); - if (offset_bits != 0 || - (value_len != 8 && value_len != 16 && value_len != 32 - && value_len != 64)) { + if (is_Primitive_type(subtype) + && get_primitive_base_type(subtype) != NULL) { emit_bitfield(&vals[offset], offset_bits, sub_initializer, subtype); continue; + } else { + assert(offset_bits == 0); } } @@ -1075,18 +1213,21 @@ static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity) /* now write values sorted */ for (k = 0; k < size; ) { - int space = 0; - int elem_size = 1; - if (vals[k].kind == NORMAL) { + int space = 0; + int elem_size = 1; + normal_or_bitfield_kind kind = vals[k].kind; + switch (kind) { + case NORMAL: if (vals[k].v.value != NULL) { emit_atomic_init(env, vals[k].v.value); elem_size = get_mode_size_bytes(get_irn_mode(vals[k].v.value)); - } else { - elem_size = 0; - } - } else if (vals[k].kind == TARVAL) { - tarval *tv = vals[k].v.tarval; - size_t size = get_mode_size_bytes(get_tarval_mode(tv)); + } else { + elem_size = 0; + } + break; + case TARVAL: { + ir_tarval *tv = vals[k].v.tarval; + size_t size = get_mode_size_bytes(get_tarval_mode(tv)); assert(tv != NULL); @@ -1095,10 +1236,15 @@ static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity) emit_arith_tarval(tv, size); be_emit_char('\n'); be_emit_write_line(); - } else { - assert(vals[k].kind == BITFIELD); + break; + } + case STRING: + elem_size = emit_string_initializer(vals[k].v.string); + break; + case BITFIELD: be_emit_irprintf("\t.byte\t%d\n", vals[k].v.bf_val); be_emit_write_line(); + break; } k += elem_size; @@ -1109,7 +1255,7 @@ static void emit_initializer(be_gas_decl_env_t *env, const ir_entity *entity) /* a gap */ if (space > 0) { - be_emit_irprintf("\t.space\t%d\n", space); + be_emit_irprintf("\t.space\t%d, 0\n", space); be_emit_write_line(); } } @@ -1164,7 +1310,7 @@ static void emit_compound_graph_init(be_gas_decl_env_t *env, if (offset_bits != 0 || (value_len != 8 && value_len != 16 && value_len != 32 && value_len != 64)) { - tarval *tv = get_atomic_init_tv(value); + ir_tarval *tv = get_atomic_init_tv(value); unsigned char curr_bits, last_bits = 0; if (tv == NULL) { panic("Couldn't get numeric value for bitfield initializer '%s'", @@ -1220,7 +1366,7 @@ static void emit_compound_graph_init(be_gas_decl_env_t *env, /* a gap */ if (space > 0) { - be_emit_irprintf("\t.space\t%d\n", space); + be_emit_irprintf("\t.space\t%d, 0\n", space); be_emit_write_line(); } } @@ -1245,37 +1391,68 @@ static unsigned get_effective_entity_alignment(const ir_entity *entity) static void emit_common(const ir_entity *entity) { - const char *name = get_entity_ld_name(entity); - unsigned size = get_type_size_bytes(get_entity_type(entity)); - unsigned alignment = get_effective_entity_alignment(entity); - ir_visibility visibility = get_entity_visibility(entity); - ir_linkage linkage = get_entity_linkage(entity); - - if (visibility == ir_visibility_local - || visibility == ir_visibility_private) { - /* counter the visibility_global effect of .comm - * ... and to be honest I have no idea what local common symbols - * are good for... - */ - be_emit_irprintf("\t.local %s\n", name); + unsigned size = get_type_size_bytes(get_entity_type(entity)); + unsigned alignment = get_effective_entity_alignment(entity); + + if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) { + emit_weak(entity); + } + + switch (be_gas_object_file_format) { + case OBJECT_FILE_FORMAT_MACH_O: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment)); + be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_ELF: + case OBJECT_FILE_FORMAT_ELF_SPARC: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, alignment); be_emit_write_line(); + return; + case OBJECT_FILE_FORMAT_COFF: + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u # %u\n", size, alignment); + be_emit_write_line(); + return; } - if (linkage & IR_LINKAGE_WEAK) { + panic("invalid object file format"); +} + +static void emit_local_common(const ir_entity *entity) +{ + unsigned size = get_type_size_bytes(get_entity_type(entity)); + unsigned alignment = get_effective_entity_alignment(entity); + + if (get_entity_linkage(entity) & IR_LINKAGE_WEAK) { emit_weak(entity); } switch (be_gas_object_file_format) { case OBJECT_FILE_FORMAT_MACH_O: - be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, - log2_floor(alignment)); + be_emit_cstring("\t.lcomm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, log2_floor(alignment)); be_emit_write_line(); return; case OBJECT_FILE_FORMAT_ELF: - be_emit_irprintf("\t.comm %s,%u,%u\n", name, size, alignment); + case OBJECT_FILE_FORMAT_ELF_SPARC: + be_emit_cstring("\t.local "); + be_gas_emit_entity(entity); + be_emit_cstring("\n"); + be_emit_write_line(); + be_emit_cstring("\t.comm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u,%u\n", size, alignment); be_emit_write_line(); return; case OBJECT_FILE_FORMAT_COFF: - be_emit_irprintf("\t.comm %s,%u # %u\n", name, size, alignment); + be_emit_cstring("\t.lcomm "); + be_gas_emit_entity(entity); + be_emit_irprintf(",%u # %u\n", size, alignment); be_emit_write_line(); return; } @@ -1287,7 +1464,7 @@ static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t secti /* we can only do PIC code on macho so far */ assert(be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O); - be_emit_ident(get_entity_ld_ident(entity)); + be_gas_emit_entity(entity); be_emit_cstring(":\n"); be_emit_write_line(); be_emit_cstring("\t.indirect_symbol "); @@ -1304,35 +1481,49 @@ static void emit_indirect_symbol(const ir_entity *entity, be_gas_section_t secti } } +char const *be_gas_get_private_prefix(void) +{ + return be_gas_object_file_format == OBJECT_FILE_FORMAT_MACH_O ? "L" : ".L"; +} + void be_gas_emit_entity(const ir_entity *entity) { if (entity->type == firm_code_type) { ir_label_t label = get_entity_label(entity); - be_emit_string(be_gas_block_label_prefix()); - be_emit_irprintf("%lu", label); + be_emit_irprintf("%s_%lu", be_gas_get_private_prefix(), label); return; } if (get_entity_visibility(entity) == ir_visibility_private) { - be_emit_cstring(".L"); + be_emit_string(be_gas_get_private_prefix()); } be_emit_ident(get_entity_ld_ident(entity)); } +void be_gas_emit_block_name(const ir_node *block) +{ + if (has_Block_entity(block)) { + ir_entity *entity = get_Block_entity(block); + be_gas_emit_entity(entity); + } else { + be_emit_irprintf("%s%ld", be_gas_get_private_prefix(), get_irn_node_nr(block)); + } +} + /** * Dump a global entity. * * @param env the gas output environment * @param ent the entity to be dumped */ -static void emit_global(be_gas_decl_env_t *env, const ir_entity *ent) +static void emit_global(be_gas_decl_env_t *env, const ir_entity *entity) { - ir_type *type = get_entity_type(ent); - ident *ld_ident = get_entity_ld_ident(ent); - unsigned alignment = get_effective_entity_alignment(ent); - be_gas_section_t section = determine_section(env, ent); - ir_visibility visibility = get_entity_visibility(ent); - ir_linkage linkage = get_entity_linkage(ent); + ir_type *type = get_entity_type(entity); + ident *ld_ident = get_entity_ld_ident(entity); + unsigned alignment = get_effective_entity_alignment(entity); + be_gas_section_t section = determine_section(env, entity); + ir_visibility visibility = get_entity_visibility(entity); + ir_linkage linkage = get_entity_linkage(entity); /* block labels are already emittet in the code */ if (type == firm_code_type) @@ -1343,23 +1534,34 @@ static void emit_global(be_gas_decl_env_t *env, const ir_entity *ent) if (is_Method_type(type) && section != GAS_SECTION_PIC_TRAMPOLINES) { /* functions with graph are already emitted with * be_gas_emit_function_prolog */ - if (get_entity_irg(ent) == NULL) { - emit_visibility(ent); + if (get_entity_irg(entity) == NULL) { + emit_visibility(entity); } return; } - be_dbg_variable(ent); + be_dbg_variable(entity); - if (section == GAS_SECTION_BSS && (linkage & IR_LINKAGE_MERGE)) { - if (get_entity_visibility(ent) == ir_visibility_external) { - panic("merge link semantic not supported for extern entities"); + if (section == GAS_SECTION_BSS) { + switch (visibility) { + case ir_visibility_local: + case ir_visibility_private: + emit_local_common(entity); + return; + case ir_visibility_default: + if (linkage & IR_LINKAGE_MERGE) { + emit_common(entity); + return; + } + break; + case ir_visibility_external: + if (linkage & IR_LINKAGE_MERGE) + panic("merge link semantic not supported for extern entities"); + break; } - emit_common(ent); - return; } - emit_visibility(ent); + emit_visibility(entity); if (visibility == ir_visibility_external) { /* nothing to do for externally defined values */ return; @@ -1368,11 +1570,11 @@ static void emit_global(be_gas_decl_env_t *env, const ir_entity *ent) if (!is_po2(alignment)) panic("alignment not a power of 2"); - emit_section(section, ent); + emit_section(section, entity); if (section == GAS_SECTION_PIC_TRAMPOLINES || section == GAS_SECTION_PIC_SYMBOLS) { - emit_indirect_symbol(ent, section); + emit_indirect_symbol(entity, section); return; } @@ -1381,30 +1583,34 @@ static void emit_global(be_gas_decl_env_t *env, const ir_entity *ent) emit_align(alignment); } if (be_gas_object_file_format == OBJECT_FILE_FORMAT_ELF - && be_gas_emit_types) { + && be_gas_emit_types + && visibility != ir_visibility_private) { be_emit_cstring("\t.type\t"); - be_gas_emit_entity(ent); + be_gas_emit_entity(entity); be_emit_cstring(", "); be_emit_char(be_gas_elf_type_char); be_emit_cstring("object\n\t.size\t");\ - be_gas_emit_entity(ent); + be_gas_emit_entity(entity); be_emit_irprintf(", %u\n", get_type_size_bytes(type)); } if (get_id_str(ld_ident)[0] != '\0') { - be_gas_emit_entity(ent); + be_gas_emit_entity(entity); be_emit_cstring(":\n"); be_emit_write_line(); } - if (entity_is_null(ent)) { - be_emit_irprintf("\t.zero %u\n", get_type_size_bytes(type)); - be_emit_write_line(); - } else if(entity_has_compound_ent_values(ent)) { - emit_compound_graph_init(env, ent); + if (entity_is_null(entity)) { + unsigned size = get_type_size_bytes(type); + if (size > 0) { + be_emit_irprintf("\t.space %u, 0\n", get_type_size_bytes(type)); + be_emit_write_line(); + } + } else if (entity_has_compound_ent_values(entity)) { + emit_compound_graph_init(env, entity); } else { - assert(ent->initializer != NULL); - emit_initializer(env, ent); + assert(entity->initializer != NULL); + emit_initializer(env, entity); } } @@ -1416,7 +1622,7 @@ static void emit_global(be_gas_decl_env_t *env, const ir_entity *ent) */ static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env) { - int i, n = get_compound_n_members(gt); + size_t i, n = get_compound_n_members(gt); for (i = 0; i < n; i++) { ir_entity *ent = get_compound_member(gt, i); @@ -1424,8 +1630,6 @@ static void be_gas_emit_globals(ir_type *gt, be_gas_decl_env_t *env) } } -/************************************************************************/ - /* Generate all entities. */ void be_gas_emit_decls(const be_main_env_t *main_env) { @@ -1455,3 +1659,65 @@ void be_gas_emit_decls(const be_main_env_t *main_env) be_emit_write_line(); } } + +void emit_jump_table(const ir_node *node, long default_pn, ir_entity *entity, + get_cfop_target_func get_cfop_target) +{ + long switch_max = LONG_MIN; + ir_node *default_block = NULL; + unsigned long length; + const ir_edge_t *edge; + unsigned i; + ir_node **table; + + /* go over all proj's and collect them */ + foreach_out_edge(node, edge) { + ir_node *proj = get_edge_src_irn(edge); + long pn = get_Proj_proj(proj); + + /* check for default proj */ + if (pn == default_pn) { + assert(default_block == NULL); /* more than 1 default_pn? */ + default_block = get_cfop_target(proj); + } else { + switch_max = pn > switch_max ? pn : switch_max; + } + } + assert(switch_max > LONG_MIN); + + length = (unsigned long) switch_max + 1; + /* the 16000 isn't a real limit of the architecture. But should protect us + * from seamingly endless compiler runs */ + if (length > 16000) { + /* switch lowerer should have broken this monster to pieces... */ + panic("too large switch encountered"); + } + + table = XMALLOCNZ(ir_node*, length); + foreach_out_edge(node, edge) { + ir_node *proj = get_edge_src_irn(edge); + long pn = get_Proj_proj(proj); + if (pn == default_pn) + continue; + + table[pn] = get_cfop_target(proj); + } + + /* emit table */ + be_gas_emit_switch_section(GAS_SECTION_RODATA); + be_emit_cstring("\t.align 4\n"); + be_gas_emit_entity(entity); + be_emit_cstring(":\n"); + for (i = 0; i < length; ++i) { + ir_node *block = table[i]; + if (block == NULL) + block = default_block; + be_emit_cstring("\t.long "); + be_gas_emit_block_name(block); + be_emit_char('\n'); + be_emit_write_line(); + } + be_gas_emit_switch_section(GAS_SECTION_TEXT); + + xfree(table); +}