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Fix calculation of fpmem_offset on little endian systems; Silence warnings when building explow

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From-SVN: r24443
This commit is contained in:
Michael Meissner 1998-12-30 19:37:53 +00:00 committed by Michael Meissner
parent c2a2650529
commit ff381587ec
3 changed files with 56 additions and 40 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
Wed Dec 30 22:24:00 1998 Michael Meissner <meissner@cygnus.com>
* rs6000.md ({save,restore}_stack_function): Take 2 operands to
avoid warnings in compiling explow.c.
(patch from Ken Raeburn, raeburn@cygnus.com)
* rs6000.c (rs6000_stack_info): Force 8-byte alignment of
fpmem_offset. Compute total size after that, and then
rs6000_fpmem_offset using both values.
Mon Dec 28 19:26:32 1998 Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
* gcc.texi (Non-bugs): ``Empty'' loops will be optimized away in

76
gcc/config/rs6000/rs6000.c
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@ -3496,40 +3496,6 @@ rs6000_stack_info ()
+ info_ptr->toc_size
+ info_ptr->main_size, 8);
total_raw_size = (info_ptr->vars_size
+ info_ptr->parm_size
+ info_ptr->fpmem_size
+ info_ptr->save_size
+ info_ptr->varargs_size
+ info_ptr->fixed_size);
info_ptr->total_size = RS6000_ALIGN (total_raw_size, ABI_STACK_BOUNDARY / BITS_PER_UNIT);
/* Determine if we need to allocate any stack frame:
For AIX we need to push the stack if a frame pointer is needed (because
the stack might be dynamically adjusted), if we are debugging, if we
make calls, or if the sum of fp_save, gp_save, fpmem, and local variables
are more than the space needed to save all non-volatile registers:
32-bit: 18*8 + 19*4 = 220 or 64-bit: 18*8 + 19*8 = 296
For V.4 we don't have the stack cushion that AIX uses, but assume that
the debugger can handle stackless frames. */
if (info_ptr->calls_p)
info_ptr->push_p = 1;
else if (abi == ABI_V4 || abi == ABI_NT || abi == ABI_SOLARIS)
info_ptr->push_p = (total_raw_size > info_ptr->fixed_size
|| (abi == ABI_NT ? info_ptr->lr_save_p
: info_ptr->calls_p));
else
info_ptr->push_p = (frame_pointer_needed
|| write_symbols != NO_DEBUG
|| ((total_raw_size - info_ptr->fixed_size)
> (TARGET_32BIT ? 220 : 296)));
/* Calculate the offsets */
switch (abi)
{
@ -3569,6 +3535,44 @@ rs6000_stack_info ()
break;
}
if (info_ptr->fpmem_p
&& (info_ptr->main_save_offset - info_ptr->fpmem_size) % 8)
info_ptr->fpmem_size += reg_size;
total_raw_size = (info_ptr->vars_size
+ info_ptr->parm_size
+ info_ptr->fpmem_size
+ info_ptr->save_size
+ info_ptr->varargs_size
+ info_ptr->fixed_size);
info_ptr->total_size = RS6000_ALIGN (total_raw_size, ABI_STACK_BOUNDARY / BITS_PER_UNIT);
/* Determine if we need to allocate any stack frame:
For AIX we need to push the stack if a frame pointer is needed (because
the stack might be dynamically adjusted), if we are debugging, if we
make calls, or if the sum of fp_save, gp_save, fpmem, and local variables
are more than the space needed to save all non-volatile registers:
32-bit: 18*8 + 19*4 = 220 or 64-bit: 18*8 + 19*8 = 296
For V.4 we don't have the stack cushion that AIX uses, but assume that
the debugger can handle stackless frames. */
if (info_ptr->calls_p)
info_ptr->push_p = 1;
else if (abi == ABI_V4 || abi == ABI_NT || abi == ABI_SOLARIS)
info_ptr->push_p = (total_raw_size > info_ptr->fixed_size
|| (abi == ABI_NT ? info_ptr->lr_save_p
: info_ptr->calls_p));
else
info_ptr->push_p = (frame_pointer_needed
|| write_symbols != NO_DEBUG
|| ((total_raw_size - info_ptr->fixed_size)
> (TARGET_32BIT ? 220 : 296)));
if (info_ptr->fpmem_p)
{
info_ptr->fpmem_offset = info_ptr->main_save_offset - info_ptr->fpmem_size;
@ -3581,10 +3585,10 @@ rs6000_stack_info ()
info_ptr->fpmem_offset = 0;
/* Zero offsets if we're not saving those registers */
if (info_ptr->fp_size == 0)
if (!info_ptr->fp_size)
info_ptr->fp_save_offset = 0;
if (info_ptr->gp_size == 0)
if (!info_ptr->gp_size)
info_ptr->gp_save_offset = 0;
if (!info_ptr->lr_save_p)

10
gcc/config/rs6000/rs6000.md
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@ -7226,14 +7226,16 @@
;; save area is a memory location.
(define_expand "save_stack_function"
[(use (const_int 0))]
[(match_operand 0 "any_operand" "")
(match_operand 1 "any_operand" "")]
""
"")
"DONE;")
(define_expand "restore_stack_function"
[(use (const_int 0))]
[(match_operand 0 "any_operand" "")
(match_operand 1 "any_operand" "")]
""
"")
"DONE;")
(define_expand "restore_stack_block"
[(use (match_operand 0 "register_operand" ""))