/* Values 1-5: see jump.c */
int ix86_branch_cost;
+/* Variables which are this size or smaller are put in the data/bss
+ or ldata/lbss sections. */
+
+int ix86_section_threshold = 65536;
+
/* Prefix built by ASM_GENERATE_INTERNAL_LABEL. */
char internal_label_prefix[16];
int internal_label_prefix_len;
static REAL_VALUE_TYPE ext_80387_constants_table [5];
static bool ext_80387_constants_init = 0;
static void init_ext_80387_constants (void);
+static bool ix86_in_large_data_p (tree);
+static void ix86_encode_section_info (tree, rtx, int);
+static void x86_64_elf_unique_section (tree decl, int reloc) ATTRIBUTE_UNUSED;
+static void x86_64_elf_select_section (tree decl, int reloc,
+ unsigned HOST_WIDE_INT align)
+ ATTRIBUTE_UNUSED;
\f
/* Initialize the GCC target structure. */
#undef TARGET_ATTRIBUTE_TABLE
#undef TARGET_ASM_FUNCTION_EPILOGUE
#define TARGET_ASM_FUNCTION_EPILOGUE ix86_output_function_epilogue
+#undef TARGET_ENCODE_SECTION_INFO
+#define TARGET_ENCODE_SECTION_INFO ix86_encode_section_info
+
#undef TARGET_ASM_OPEN_PAREN
#define TARGET_ASM_OPEN_PAREN ""
#undef TARGET_ASM_CLOSE_PAREN
{
if (!strcmp (ix86_cmodel_string, "small"))
ix86_cmodel = flag_pic ? CM_SMALL_PIC : CM_SMALL;
+ else if (!strcmp (ix86_cmodel_string, "medium"))
+ ix86_cmodel = flag_pic ? CM_MEDIUM_PIC : CM_MEDIUM;
else if (flag_pic)
sorry ("code model %s not supported in PIC mode", ix86_cmodel_string);
else if (!strcmp (ix86_cmodel_string, "32"))
ix86_cmodel = CM_32;
else if (!strcmp (ix86_cmodel_string, "kernel") && !flag_pic)
ix86_cmodel = CM_KERNEL;
- else if (!strcmp (ix86_cmodel_string, "medium") && !flag_pic)
- ix86_cmodel = CM_MEDIUM;
else if (!strcmp (ix86_cmodel_string, "large") && !flag_pic)
ix86_cmodel = CM_LARGE;
else
else
ix86_branch_cost = i;
}
+ if (ix86_section_threshold_string)
+ {
+ i = atoi (ix86_section_threshold_string);
+ if (i < 0)
+ error ("-mlarge-data-threshold=%d is negative", i);
+ else
+ ix86_section_threshold = i;
+ }
if (ix86_tls_dialect_string)
{
flag_schedule_insns_after_reload = flag_schedule_insns = 0;
}
\f
+/* switch to the appropriate section for output of DECL.
+ DECL is either a `VAR_DECL' node or a constant of some sort.
+ RELOC indicates whether forming the initial value of DECL requires
+ link-time relocations. */
+
+static void
+x86_64_elf_select_section (tree decl, int reloc,
+ unsigned HOST_WIDE_INT align)
+{
+ if ((ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_MEDIUM_PIC)
+ && ix86_in_large_data_p (decl))
+ {
+ const char *sname = NULL;
+ switch (categorize_decl_for_section (decl, reloc, flag_pic))
+ {
+ case SECCAT_DATA:
+ sname = ".ldata";
+ break;
+ case SECCAT_DATA_REL:
+ sname = ".ldata.rel";
+ break;
+ case SECCAT_DATA_REL_LOCAL:
+ sname = ".ldata.rel.local";
+ break;
+ case SECCAT_DATA_REL_RO:
+ sname = ".ldata.rel.ro";
+ break;
+ case SECCAT_DATA_REL_RO_LOCAL:
+ sname = ".ldata.rel.ro.local";
+ break;
+ case SECCAT_BSS:
+ sname = ".lbss";
+ break;
+ case SECCAT_RODATA:
+ case SECCAT_RODATA_MERGE_STR:
+ case SECCAT_RODATA_MERGE_STR_INIT:
+ case SECCAT_RODATA_MERGE_CONST:
+ sname = ".lrodata";
+ break;
+ case SECCAT_SRODATA:
+ case SECCAT_SDATA:
+ case SECCAT_SBSS:
+ gcc_unreachable ();
+ case SECCAT_TEXT:
+ case SECCAT_TDATA:
+ case SECCAT_TBSS:
+ /* We don't split these for medium model. Place them into
+ default sections and hope for best. */
+ break;
+ }
+ if (sname)
+ {
+ named_section (decl, sname, reloc);
+ return;
+ }
+ }
+ default_elf_select_section (decl, reloc, align);
+}
+
+/* Build up a unique section name, expressed as a
+ STRING_CST node, and assign it to DECL_SECTION_NAME (decl).
+ RELOC indicates whether the initial value of EXP requires
+ link-time relocations. */
+
+static void
+x86_64_elf_unique_section (tree decl, int reloc)
+{
+ if ((ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_MEDIUM_PIC)
+ && ix86_in_large_data_p (decl))
+ {
+ const char *prefix = NULL;
+ /* We only need to use .gnu.linkonce if we don't have COMDAT groups. */
+ bool one_only = DECL_ONE_ONLY (decl) && !HAVE_COMDAT_GROUP;
+
+ switch (categorize_decl_for_section (decl, reloc, flag_pic))
+ {
+ case SECCAT_DATA:
+ case SECCAT_DATA_REL:
+ case SECCAT_DATA_REL_LOCAL:
+ case SECCAT_DATA_REL_RO:
+ case SECCAT_DATA_REL_RO_LOCAL:
+ prefix = one_only ? ".gnu.linkonce.ld." : ".ldata.";
+ break;
+ case SECCAT_BSS:
+ prefix = one_only ? ".gnu.linkonce.lb." : ".lbss.";
+ break;
+ case SECCAT_RODATA:
+ case SECCAT_RODATA_MERGE_STR:
+ case SECCAT_RODATA_MERGE_STR_INIT:
+ case SECCAT_RODATA_MERGE_CONST:
+ prefix = one_only ? ".gnu.linkonce.lr." : ".lrodata.";
+ break;
+ case SECCAT_SRODATA:
+ case SECCAT_SDATA:
+ case SECCAT_SBSS:
+ gcc_unreachable ();
+ case SECCAT_TEXT:
+ case SECCAT_TDATA:
+ case SECCAT_TBSS:
+ /* We don't split these for medium model. Place them into
+ default sections and hope for best. */
+ break;
+ }
+ if (prefix)
+ {
+ const char *name;
+ size_t nlen, plen;
+ char *string;
+ plen = strlen (prefix);
+
+ name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
+ name = targetm.strip_name_encoding (name);
+ nlen = strlen (name);
+
+ string = alloca (nlen + plen + 1);
+ memcpy (string, prefix, plen);
+ memcpy (string + plen, name, nlen + 1);
+
+ DECL_SECTION_NAME (decl) = build_string (nlen + plen, string);
+ return;
+ }
+ }
+ default_unique_section (decl, reloc);
+}
+
+/* This says how to output assembler code to declare an
+ uninitialized external linkage data object.
+
+ For medim model x86-64 we need to use .largecomm opcode for
+ large objects. */
+void
+x86_elf_aligned_common (FILE *file,
+ const char *name, unsigned HOST_WIDE_INT size,
+ int align)
+{
+ if ((ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_MEDIUM_PIC)
+ && size > (unsigned int)ix86_section_threshold)
+ fprintf (file, ".largecomm\t");
+ else
+ fprintf (file, "%s", COMMON_ASM_OP);
+ assemble_name (file, name);
+ fprintf (file, ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",
+ size, align / BITS_PER_UNIT);
+}
+
+/* Utility function for targets to use in implementing
+ ASM_OUTPUT_ALIGNED_BSS. */
+
+void
+x86_output_aligned_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
+ const char *name, unsigned HOST_WIDE_INT size,
+ int align)
+{
+ if ((ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_MEDIUM_PIC)
+ && size > (unsigned int)ix86_section_threshold)
+ named_section (decl, ".lbss", 0);
+ else
+ bss_section ();
+ ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT));
+#ifdef ASM_DECLARE_OBJECT_NAME
+ last_assemble_variable_decl = decl;
+ ASM_DECLARE_OBJECT_NAME (file, name, decl);
+#else
+ /* Standard thing is just output label for the object. */
+ ASM_OUTPUT_LABEL (file, name);
+#endif /* ASM_DECLARE_OBJECT_NAME */
+ ASM_OUTPUT_SKIP (file, size ? size : 1);
+}
+\f
void
optimization_options (int level, int size ATTRIBUTE_UNUSED)
{
if (pic_reg_used)
{
- insn = emit_insn (gen_set_got (pic_offset_table_rtx));
+ if (TARGET_64BIT)
+ insn = emit_insn (gen_set_got_rex64 (pic_offset_table_rtx));
+ else
+ insn = emit_insn (gen_set_got (pic_offset_table_rtx));
/* Even with accurate pre-reload life analysis, we can wind up
deleting all references to the pic register after reload.
if (GET_CODE (x) == UNSPEC)
switch (XINT (x, 1))
{
+ case UNSPEC_GOTOFF:
+ return TARGET_64BIT;
case UNSPEC_TPOFF:
case UNSPEC_NTPOFF:
return local_exec_symbolic_operand (XVECEXP (x, 0, 0), Pmode);
{
case CONST:
inner = XEXP (x, 0);
+ if (GET_CODE (inner) == PLUS
+ && GET_CODE (XEXP (inner, 1)) == CONST_INT)
+ inner = XEXP (inner, 0);
/* Only some unspecs are valid as "constants". */
if (GET_CODE (inner) == UNSPEC)
switch (XINT (inner, 1))
{
+ case UNSPEC_GOTOFF:
+ return TARGET_64BIT;
case UNSPEC_TPOFF:
return local_exec_symbolic_operand (XVECEXP (inner, 0, 0), Pmode);
default:
if (tls_symbolic_operand (disp, GET_MODE (disp)))
return 0;
if (GET_CODE (disp) == SYMBOL_REF
- && ix86_cmodel == CM_SMALL_PIC
+ && !SYMBOL_REF_FAR_ADDR_P (disp)
&& SYMBOL_REF_LOCAL_P (disp))
return 1;
if (GET_CODE (disp) == LABEL_REF)
if (tls_symbolic_operand (op0, GET_MODE (op0)))
return 0;
if (((GET_CODE (op0) == SYMBOL_REF
- && ix86_cmodel == CM_SMALL_PIC
+ && !SYMBOL_REF_FAR_ADDR_P (op0)
&& SYMBOL_REF_LOCAL_P (op0))
|| GET_CODE (op0) == LABEL_REF)
&& GET_CODE (op1) == CONST_INT
/* We are unsafe to allow PLUS expressions. This limit allowed distance
of GOT tables. We should not need these anyway. */
if (GET_CODE (disp) != UNSPEC
- || XINT (disp, 1) != UNSPEC_GOTPCREL)
+ || (XINT (disp, 1) != UNSPEC_GOTPCREL
+ && XINT (disp, 1) != UNSPEC_GOTOFF))
return 0;
if (GET_CODE (XVECEXP (disp, 0, 0)) != SYMBOL_REF
if (TARGET_64BIT && legitimate_pic_address_disp_p (addr))
new = addr;
+ else if (TARGET_64BIT
+ && ix86_cmodel != CM_SMALL_PIC
+ && local_symbolic_operand (addr, Pmode))
+ {
+ rtx tmpreg;
+ /* This symbol may be referenced via a displacement from the PIC
+ base address (@GOTOFF). */
+
+ if (reload_in_progress)
+ regs_ever_live[PIC_OFFSET_TABLE_REGNUM] = 1;
+ if (GET_CODE (addr) == CONST)
+ addr = XEXP (addr, 0);
+ if (GET_CODE (addr) == PLUS)
+ {
+ new = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, XEXP (addr, 0)), UNSPEC_GOTOFF);
+ new = gen_rtx_PLUS (Pmode, new, XEXP (addr, 1));
+ }
+ else
+ new = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, addr), UNSPEC_GOTOFF);
+ new = gen_rtx_CONST (Pmode, new);
+ if (!reg)
+ tmpreg = gen_reg_rtx (Pmode);
+ else
+ tmpreg = reg;
+ emit_move_insn (tmpreg, new);
+
+ if (reg != 0)
+ {
+ new = expand_simple_binop (Pmode, PLUS, reg, pic_offset_table_rtx,
+ tmpreg, 1, OPTAB_DIRECT);
+ new = reg;
+ }
+ else new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, tmpreg);
+ }
else if (!TARGET_64BIT && local_symbolic_operand (addr, Pmode))
{
/* This symbol may be referenced via a displacement from the PIC
#else
if (GET_CODE (op0) == MEM)
op1 = force_reg (Pmode, op1);
- else
+ else
op1 = legitimize_address (op1, op1, Pmode);
#endif /* TARGET_MACHO */
}
return clobbers;
}
+/* Return true if this goes in small data/bss. */
+
+static bool
+ix86_in_large_data_p (tree exp)
+{
+ if (ix86_cmodel != CM_MEDIUM && ix86_cmodel != CM_MEDIUM_PIC)
+ return false;
+
+ /* Functions are never large data. */
+ if (TREE_CODE (exp) == FUNCTION_DECL)
+ return false;
+
+ if (TREE_CODE (exp) == VAR_DECL && DECL_SECTION_NAME (exp))
+ {
+ const char *section = TREE_STRING_POINTER (DECL_SECTION_NAME (exp));
+ if (strcmp (section, ".ldata") == 0
+ || strcmp (section, ".lbss") == 0)
+ return true;
+ return false;
+ }
+ else
+ {
+ HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (exp));
+
+ /* If this is an incomplete type with size 0, then we can't put it
+ in data because it might be too big when completed. */
+ if (!size || size > ix86_section_threshold)
+ return true;
+ }
+
+ return false;
+}
+static void
+ix86_encode_section_info (tree decl, rtx rtl, int first)
+{
+ default_encode_section_info (decl, rtl, first);
+
+ if (TREE_CODE (decl) == VAR_DECL
+ && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))
+ && ix86_in_large_data_p (decl))
+ SYMBOL_REF_FLAGS (XEXP (rtl, 0)) |= SYMBOL_FLAG_FAR_ADDR;
+}
+
/* Worker function for REVERSE_CONDITION. */
enum rtx_code
git://gcc.gnu.org / gcc.git / commitdiff