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| author | Nick Clifton <nickc@redhat.com> | 2009-11-24 15:38:39 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2009-11-24 15:38:39 +0000 |
| commit | 356aaf8b70407acd2057011d0b051e0cadfeda62 (patch) | |
| tree | 41956e65d426c50453f4e1653c924cd3d03f80c8 /gcc/config/v850 | |
| parent | a5883ba0de68efad36db145e75c86394d8bd44ea (diff) | |
| download | gcc-356aaf8b70407acd2057011d0b051e0cadfeda62.zip gcc-356aaf8b70407acd2057011d0b051e0cadfeda62.tar.gz gcc-356aaf8b70407acd2057011d0b051e0cadfeda62.tar.bz2 | |
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
Diffstat (limited to 'gcc/config/v850')
| -rw-r--r-- | gcc/config/v850/v850.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/gcc/config/v850/v850.c b/gcc/config/v850/v850.c index 6242ba6..b7dd092 100644 --- a/gcc/config/v850/v850.c +++ b/gcc/config/v850/v850.c @@ -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; @@ -340,12 +345,15 @@ 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 align = size; - cum->nbytes = (cum->nbytes + align - 1) &~(align - 1); + cum->nbytes = (cum->nbytes + align - 1) & ~ (align - 1); if (cum->nbytes > 4 * UNITS_PER_WORD) return 0; |