diff options
Diffstat (limited to 'gcc/tree.c')
| -rw-r--r-- | gcc/tree.c | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -9975,6 +9975,13 @@ build_common_builtin_nodes (void) "__builtin_alloca_with_align", alloca_flags); + ftype = build_function_type_list (ptr_type_node, size_type_node, + size_type_node, size_type_node, NULL_TREE); + local_define_builtin ("__builtin_alloca_with_align_and_max", ftype, + BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX, + "__builtin_alloca_with_align_and_max", + alloca_flags); + ftype = build_function_type_list (void_type_node, ptr_type_node, ptr_type_node, ptr_type_node, NULL_TREE); @@ -10716,6 +10723,33 @@ maybe_build_call_expr_loc (location_t loc, combined_fn fn, tree type, } } +/* Return a function call to the appropriate builtin alloca variant. + + SIZE is the size to be allocated. ALIGN, if non-zero, is the requested + alignment of the allocated area. MAX_SIZE, if non-negative, is an upper + bound for SIZE in case it is not a fixed value. */ + +tree +build_alloca_call_expr (tree size, unsigned int align, HOST_WIDE_INT max_size) +{ + if (max_size >= 0) + { + tree t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN_AND_MAX); + return + build_call_expr (t, 3, size, size_int (align), size_int (max_size)); + } + else if (align > 0) + { + tree t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN); + return build_call_expr (t, 2, size, size_int (align)); + } + else + { + tree t = builtin_decl_explicit (BUILT_IN_ALLOCA); + return build_call_expr (t, 1, size); + } +} + /* Create a new constant string literal and return a char* pointer to it. The STRING_CST value is the LEN characters at STR. */ tree |