* i386.c: Revert 07-30 ix86_output_main_function_alignment_hack.
From-SVN: r44638
This commit is contained in:
parent
8bbbef3434
commit
68c5782de8
|
@ -1,3 +1,7 @@
|
|||
2001-08-04 Richard Henderson <rth@redhat.com>
|
||||
|
||||
* i386.c: Revert 07-30 ix86_output_main_function_alignment_hack.
|
||||
|
||||
2001-08-04 Neil Booth <neil@daikokuya.demon.co.uk>
|
||||
|
||||
* cpphash.h (struct cpp_reader): New member directive_line.
|
||||
|
|
|
@ -574,7 +574,6 @@ static HOST_WIDE_INT ix86_GOT_alias_set PARAMS ((void));
|
|||
static void ix86_adjust_counter PARAMS ((rtx, HOST_WIDE_INT));
|
||||
static rtx ix86_expand_aligntest PARAMS ((rtx, int));
|
||||
static void ix86_expand_strlensi_unroll_1 PARAMS ((rtx, rtx));
|
||||
static void ix86_output_main_function_alignment_hack PARAMS ((FILE *f, int));
|
||||
|
||||
struct ix86_address
|
||||
{
|
||||
|
@ -640,10 +639,6 @@ static void sco_asm_named_section PARAMS ((const char *, unsigned int,
|
|||
HOST_WIDE_INT));
|
||||
# undef TARGET_ASM_FUNCTION_PROLOGUE
|
||||
# define TARGET_ASM_FUNCTION_PROLOGUE ix86_osf_output_function_prologue
|
||||
#else
|
||||
# undef TARGET_ASM_FUNCTION_PROLOGUE
|
||||
# define TARGET_ASM_FUNCTION_PROLOGUE \
|
||||
ix86_output_main_function_alignment_hack
|
||||
#endif
|
||||
|
||||
#undef TARGET_ASM_OPEN_PAREN
|
||||
|
@ -10788,48 +10783,6 @@ ix86_memory_move_cost (mode, class, in)
|
|||
}
|
||||
}
|
||||
|
||||
/* Most of current runtimes (Jul 2001) do not align stack properly when
|
||||
entering main, so emit an wrapper to align stack before the real main
|
||||
code is called.
|
||||
|
||||
This can eventually go if we manage to fix the runtimes or teach gcc
|
||||
to dynamically align stack in main automatically.
|
||||
|
||||
Adding check to configure is probably not good idea, as binarry can move
|
||||
from one shared library to older. */
|
||||
|
||||
static void
|
||||
ix86_output_main_function_alignment_hack (file, size)
|
||||
FILE *file;
|
||||
int size ATTRIBUTE_UNUSED;
|
||||
{
|
||||
rtx label;
|
||||
char buf[256];
|
||||
/* Check that we see main function with maximally 8 bytes of arguments.
|
||||
if so, emit the hack to align stack for runtimes, where this constraint
|
||||
is broken. */
|
||||
if (strcmp (cfun->name, "main"))
|
||||
return;
|
||||
if (cfun->pops_args || cfun->args_size > 12)
|
||||
return;
|
||||
if (PREFERRED_STACK_BOUNDARY <= 2)
|
||||
return;
|
||||
label = gen_label_rtx ();
|
||||
fprintf (file, "\tpushl\t%%ebp\n");
|
||||
fprintf (file, "\tmovl\t%%esp, %%ebp\n");
|
||||
fprintf (file, "\tandl\t$0xfffffff0, %%esp\n");
|
||||
fprintf (file, "\tpushl\t%%ebp\n");
|
||||
fprintf (file, "\tpushl\t16(%%ebp)\n");
|
||||
fprintf (file, "\tpushl\t12(%%ebp)\n");
|
||||
fprintf (file, "\tpushl\t8(%%ebp)\n");
|
||||
fprintf (file, "\tcall\t");
|
||||
ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (label));
|
||||
assemble_name (file, buf);
|
||||
fprintf (file, "\n\tleave\n");
|
||||
fprintf (file, "\tret\n");
|
||||
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (label));
|
||||
}
|
||||
|
||||
#if defined(TARGET_ELF) && defined(TARGET_COFF)
|
||||
static void
|
||||
sco_asm_named_section (name, flags, align)
|
||||
|
|
Loading…
Reference in New Issue