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(expand_call)[ARGS_GROW_DOWNWARD] Fix fencepost error in calculating high_to_save and low_to_save. 

(expand_call)[ARGS_GROW_DOWNWARD] Fix fencepost error in
calculating high_to_save and low_to_save.  Use - high_to_save to
address stack_area.

From-SVN: r2699
This commit is contained in:
Richard Stallman 1992-11-06 08:22:24 +00:00
parent 931553d837
commit b94301c2cb
1 changed files with 19 additions and 3 deletions
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22
gcc/calls.c
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@ -85,7 +85,7 @@ struct arg_data
};
#ifdef ACCUMULATE_OUTGOING_ARGS
/* A vector of one char per word of stack space. A byte if non-zero if
/* A vector of one char per byte of stack space. A byte if non-zero if
the corresponding stack location has been used.
This vector is used to prevent a function call within an argument from
clobbering any stack already set up. */
@ -1437,7 +1437,11 @@ expand_call (exp, target, ignore)
Here we compute the boundary of the that needs to be saved, if any. */
#ifdef ARGS_GROW_DOWNWARD
for (i = 0; i < reg_parm_stack_space + 1; i++)
#else
for (i = 0; i < reg_parm_stack_space; i++)
#endif
{
if (i >= highest_outgoing_arg_in_use
|| stack_usage_map[i] == 0)
@ -1463,8 +1467,15 @@ expand_call (exp, target, ignore)
stack_area = gen_rtx (MEM, save_mode,
memory_address (save_mode,
#ifdef ARGS_GROW_DOWNWARD
plus_constant (argblock,
low_to_save)));
- high_to_save)
#else
plus_constant (argblock,
low_to_save)
#endif
));
if (save_mode == BLKmode)
{
save_area = assign_stack_temp (BLKmode, num_to_save, 1);
@ -1759,7 +1770,12 @@ expand_call (exp, target, ignore)
rtx stack_area
= gen_rtx (MEM, save_mode,
memory_address (save_mode,
plus_constant (argblock, low_to_save)));
#ifdef ARGS_GROW_DOWNWARD
plus_constant (argblock, - high_to_save)
#else
plus_constant (argblock, low_to_save)
#endif
));
if (save_mode != BLKmode)
emit_move_insn (stack_area, save_area);