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v850.c (function_arg): Fix handling of zero-length function arguments. 

* config/v850/v850.c (function_arg): Fix handling of zero-length
        function arguments.

From-SVN: r154503
This commit is contained in:
Nick Clifton 2009-11-24 15:38:39 +00:00 committed by Nick Clifton
parent a5883ba0de
commit 356aaf8b70
2 changed files with 21 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-11-24 Nick Clifton <nickc@redhat.com>
* config/v850/v850.c (function_arg): Fix handling of zero-length
function arguments.
2009-11-24 Michael Matz <matz@suse.de>
* tree.h (union tree_ann_d): Don't declare.

22
gcc/config/v850/v850.c
View File

@ -264,8 +264,9 @@ v850_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED,
return size > 8;
}
/* Return an RTX to represent where a value with mode MODE will be returned
from a function. If the result is 0, the argument is pushed. */
/* Return an RTX to represent where an argument with mode MODE
and type TYPE will be passed to a function. If the result
is NULL_RTX, the argument will be pushed. */
rtx
function_arg (CUMULATIVE_ARGS * cum,
@ -273,7 +274,7 @@ function_arg (CUMULATIVE_ARGS * cum,
tree type,
int named)
{
rtx result = 0;
rtx result = NULL_RTX;
int size, align;
if (TARGET_GHS && !named)
@ -285,7 +286,11 @@ function_arg (CUMULATIVE_ARGS * cum,
size = GET_MODE_SIZE (mode);
if (size < 1)
return 0;
{
/* Once we have stopped using argument registers, do not start up again. */
cum->nbytes = 4 * UNITS_PER_WORD;
return NULL_RTX;
}
if (type)
align = TYPE_ALIGN (type) / BITS_PER_UNIT;
@ -295,11 +300,11 @@ function_arg (CUMULATIVE_ARGS * cum,
cum->nbytes = (cum->nbytes + align - 1) &~(align - 1);
if (cum->nbytes > 4 * UNITS_PER_WORD)
return 0;
return NULL_RTX;
if (type == NULL_TREE
&& cum->nbytes + size > 4 * UNITS_PER_WORD)
return 0;
return NULL_RTX;
switch (cum->nbytes / UNITS_PER_WORD)
{
@ -316,7 +321,7 @@ function_arg (CUMULATIVE_ARGS * cum,
result = gen_rtx_REG (mode, 9);
break;
default:
result = 0;
result = NULL_RTX;
}
return result;
@ -340,6 +345,9 @@ v850_arg_partial_bytes (CUMULATIVE_ARGS * cum, enum machine_mode mode,
else
size = GET_MODE_SIZE (mode);
if (size < 1)
size = 1;
if (type)
align = TYPE_ALIGN (type) / BITS_PER_UNIT;
else