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(asm_output_function_prefix, function_prologue,ix86_expand_prologue): Make the routine that sets the GOT (when pic is enabled) a function, to assist debugging.

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From-SVN: r12878
This commit is contained in:
Stan Cox 1996-09-30 19:23:11 +00:00
parent a78cb98668
commit c942177e59
1 changed files with 38 additions and 20 deletions
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58
gcc/config/i386/i386.c
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@ -129,11 +129,11 @@ struct rtx_def *(*i386_compare_gen)(), *(*i386_compare_gen_eq)();
enum processor_type ix86_cpu;
/* which instruction set architecture to use. */
int ix86_isa;
int ix86_arch;
/* Strings to hold which cpu and instruction set architecture to use. */
char *ix86_cpu_string; /* for -mcpu=<xxx> */
char *ix86_isa_string; /* for -misa=<xxx> */
char *ix86_arch_string; /* for -march=<xxx> */
/* Register allocation order */
char *i386_reg_alloc_order;
@ -178,8 +178,7 @@ override_options ()
int target_enable; /* Target flags to enable. */
int target_disable; /* Target flags to disable. */
} processor_target_table[]
= {{PROCESSOR_COMMON_STRING, PROCESSOR_COMMON, &i486_cost, 0, 0},
{PROCESSOR_I386_STRING, PROCESSOR_I386, &i386_cost, 0, 0},
= {{PROCESSOR_I386_STRING, PROCESSOR_I386, &i386_cost, 0, 0},
{PROCESSOR_I486_STRING, PROCESSOR_I486, &i486_cost, 0, 0},
{PROCESSOR_I586_STRING, PROCESSOR_PENTIUM, &pentium_cost, 0, 0},
{PROCESSOR_PENTIUM_STRING, PROCESSOR_PENTIUM, &pentium_cost, 0, 0},
@ -218,13 +217,16 @@ override_options ()
}
/* Get the architectural level. */
if (ix86_isa_string == (char *)0)
ix86_isa_string = PROCESSOR_DEFAULT_STRING;
if (ix86_cpu_string == (char *)0 && ix86_arch_string == (char *)0)
{
ix86_arch_string = PROCESSOR_PENTIUM_STRING;
ix86_cpu_string = PROCESSOR_DEFAULT_STRING;
}
for (i = 0; i < ptt_size; i++)
if (! strcmp (ix86_isa_string, processor_target_table[i].name))
if (! strcmp (ix86_arch_string, processor_target_table[i].name))
{
ix86_isa = processor_target_table[i].processor;
ix86_arch = processor_target_table[i].processor;
if (ix86_cpu_string == (char *)0)
ix86_cpu_string = processor_target_table[i].name;
break;
@ -232,17 +234,17 @@ override_options ()
if (i == ptt_size)
{
error ("bad value (%s) for -misa= switch", ix86_isa_string);
ix86_isa_string = PROCESSOR_DEFAULT_STRING;
ix86_isa = PROCESSOR_DEFAULT;
error ("bad value (%s) for -march= switch", ix86_arch_string);
ix86_arch_string = PROCESSOR_DEFAULT_STRING;
ix86_arch = PROCESSOR_DEFAULT;
}
for (j = 0; j < ptt_size; j++)
if (! strcmp (ix86_cpu_string, processor_target_table[j].name))
{
ix86_cpu = processor_target_table[j].processor;
if (i > j && (int)ix86_isa >= (int)PROCESSOR_PENTIUMPRO)
error ("-mcpu=%s does not support -march=%s", ix86_cpu_string, ix86_isa_string);
if (i > j && (int)ix86_arch >= (int)PROCESSOR_PENTIUMPRO)
error ("-mcpu=%s does not support -march=%s", ix86_cpu_string, ix86_arch_string);
target_flags |= processor_target_table[j].target_enable;
target_flags &= ~processor_target_table[j].target_disable;
@ -1700,6 +1702,8 @@ ix86_unary_operator_ok (code, mode, operands)
static rtx pic_label_rtx;
static char pic_label_name [256];
static int pic_label_no = 0;
/* This function generates code for -fpic that loads %ebx with
with the return address of the caller and then returns. */
@ -1717,9 +1721,17 @@ asm_output_function_prefix (file, name)
/* deep branch prediction favors having a return for every call */
if (pic_reg_used && TARGET_DEEP_BRANCH_PREDICTION)
{
tree prologue_node;
if (pic_label_rtx == 0)
{
pic_label_rtx = (rtx) gen_label_rtx ();
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (pic_label_rtx));
sprintf (pic_label_name, "LPR%d", pic_label_no++);
LABEL_NAME (pic_label_rtx) = pic_label_name;
}
prologue_node = make_node (FUNCTION_DECL);
DECL_RESULT (prologue_node) = 0;
ASM_DECLARE_FUNCTION_NAME (file, pic_label_name, prologue_node);
output_asm_insn ("movl (%1),%0", xops);
output_asm_insn ("ret", xops);
}
@ -1741,7 +1753,10 @@ function_prologue (file, size)
/* pic references don't explicitly mention pic_offset_table_rtx */
if (TARGET_SCHEDULE_PROLOGUE)
return;
{
pic_label_rtx = 0;
return;
}
xops[0] = stack_pointer_rtx;
xops[1] = frame_pointer_rtx;
@ -1787,12 +1802,11 @@ function_prologue (file, size)
if (pic_reg_used && TARGET_DEEP_BRANCH_PREDICTION)
{
xops[0] = pic_offset_table_rtx;
if (pic_label_rtx == 0)
pic_label_rtx = (rtx) gen_label_rtx ();
xops[1] = pic_label_rtx;
xops[1] = gen_rtx (SYMBOL_REF, Pmode, LABEL_NAME (pic_label_rtx));
output_asm_insn (AS1 (call,%P1), xops);
output_asm_insn ("addl $_GLOBAL_OFFSET_TABLE_,%0", xops);
pic_label_rtx = 0;
}
else if (pic_reg_used)
{
@ -1874,10 +1888,14 @@ ix86_expand_prologue ()
{
xops[0] = pic_offset_table_rtx;
if (pic_label_rtx == 0)
{
pic_label_rtx = (rtx) gen_label_rtx ();
xops[1] = pic_label_rtx;
sprintf (pic_label_name, "LPR%d", pic_label_no++);
LABEL_NAME (pic_label_rtx) = pic_label_name;
}
xops[1] = gen_rtx (MEM, QImode, gen_rtx (SYMBOL_REF, Pmode, LABEL_NAME (pic_label_rtx)));
emit_insn (gen_prologue_get_pc (xops[0], gen_rtx (CONST_INT, Pmode, CODE_LABEL_NUMBER(xops[1]))));
emit_insn (gen_prologue_get_pc (xops[0], xops[1]));
emit_insn (gen_prologue_set_got (xops[0],
gen_rtx (SYMBOL_REF, Pmode, "$_GLOBAL_OFFSET_TABLE_"),
gen_rtx (CONST_INT, Pmode, CODE_LABEL_NUMBER(xops[1]))));