diff options
Diffstat (limited to 'gcc/expr.h')
| -rw-r--r-- | gcc/expr.h | 26 |
1 files changed, 14 insertions, 12 deletions
@@ -79,7 +79,9 @@ enum memory_use_mode {MEMORY_USE_BAD = 0, MEMORY_USE_RO = 1, #ifdef TREE_CODE /* Don't lose if tree.h not included. */ /* Structure to record the size of a sequence of arguments - as the sum of a tree-expression and a constant. */ + as the sum of a tree-expression and a constant. This structure is + also used to store offsets from the stack, which might be negative, + so the variable part must be ssizetype, not sizetype. */ struct args_size { @@ -104,21 +106,21 @@ struct args_size if (TREE_CODE (dec) == INTEGER_CST) \ (TO).constant -= TREE_INT_CST_LOW (dec); \ else if ((TO).var == 0) \ - (TO).var = size_binop (MINUS_EXPR, integer_zero_node, dec); \ + (TO).var = size_binop (MINUS_EXPR, ssize_int (0), dec); \ else \ (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); } +/* Convert the implicit sum in a `struct args_size' into a tree + of type ssizetype. */ +#define ARGS_SIZE_TREE(SIZE) \ +((SIZE).var == 0 ? ssize_int ((SIZE).constant) \ + : size_binop (PLUS_EXPR, (SIZE).var, ssize_int ((SIZE).constant))) + /* Convert the implicit sum in a `struct args_size' into an rtx. */ -#define ARGS_SIZE_RTX(SIZE) \ -((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \ - : expand_expr (size_binop (PLUS_EXPR, (SIZE).var, \ - size_int ((SIZE).constant)), \ - NULL_RTX, VOIDmode, EXPAND_MEMORY_USE_BAD)) - -/* Convert the implicit sum in a `struct args_size' into a tree. */ -#define ARGS_SIZE_TREE(SIZE) \ -((SIZE).var == 0 ? size_int ((SIZE).constant) \ - : size_binop (PLUS_EXPR, (SIZE).var, size_int ((SIZE).constant))) +#define ARGS_SIZE_RTX(SIZE) \ +((SIZE).var == 0 ? GEN_INT ((SIZE).constant) \ + : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode, \ + EXPAND_MEMORY_USE_BAD)) /* Supply a default definition for FUNCTION_ARG_PADDING: usually pad upward, but pad short args downward on |