diff options
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index c54ab48..e128162 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -1097,7 +1097,7 @@ initialize_argument_information (int num_actuals ATTRIBUTE_UNUSED, = FUNCTION_ARG_PARTIAL_NREGS (*args_so_far, mode, type, argpos < n_named_args); - args[i].pass_on_stack = MUST_PASS_IN_STACK (mode, type); + args[i].pass_on_stack = targetm.calls.must_pass_in_stack (mode, type); /* If FUNCTION_ARG returned a (parallel [(expr_list (nil) ...) ...]), it means that we are to pass this arg in the register(s) designated @@ -4445,24 +4445,33 @@ store_one_arg (struct arg_data *arg, rtx argblock, int flags, return sibcall_failure; } -/* Nonzero if we do not know how to pass TYPE solely in registers. - We cannot do so in the following cases: +/* Nonzero if we do not know how to pass TYPE solely in registers. */ - - if the type has variable size - - if the type is marked as addressable (it is required to be constructed - into the stack) - - if the padding and mode of the type is such that a copy into a register - would put it into the wrong part of the register. +bool +must_pass_in_stack_var_size (enum machine_mode mode ATTRIBUTE_UNUSED, + tree type) +{ + if (!type) + return false; + + /* If the type has variable size... */ + if (TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST) + return true; - Which padding can't be supported depends on the byte endianness. + /* If the type is marked as addressable (it is required + to be constructed into the stack)... */ + if (TREE_ADDRESSABLE (type)) + return true; + + return false; +} - A value in a register is implicitly padded at the most significant end. - On a big-endian machine, that is the lower end in memory. - So a value padded in memory at the upper end can't go in a register. - For a little-endian machine, the reverse is true. */ +/* Another version of the TARGET_MUST_PASS_IN_STACK hook. This one + takes trailing padding of a structure into account. */ +/* ??? Should be able to merge these two by examining BLOCK_REG_PADDING. */ bool -default_must_pass_in_stack (enum machine_mode mode, tree type) +must_pass_in_stack_var_size_or_pad (enum machine_mode mode, tree type) { if (!type) return false; |