diff options
Diffstat (limited to 'gcc/rtl.c')
| -rw-r--r-- | gcc/rtl.c | 33 |
1 files changed, 12 insertions, 21 deletions
@@ -997,7 +997,7 @@ rtx read_rtx (infile) FILE *infile; { - register int i, j, list_counter; + register int i, j; RTX_CODE tmp_code; register const char *format_ptr; /* tmp_char is a buffer used for reading decimal integers @@ -1111,40 +1111,31 @@ again: case 'E': { - register struct rtx_list *next_rtx, *rtx_list_link; - struct rtx_list *list_rtx = NULL; + /* Obstack to store scratch vector in. */ + struct obstack vector_stack; + int list_counter = 0; + rtvec return_vec = NULL_RTVEC; c = read_skip_spaces (infile); if (c != '[') fatal_expected_char (infile, '[', c); /* add expressions to a list, while keeping a count */ - next_rtx = NULL; - list_counter = 0; + obstack_init (&vector_stack); while ((c = read_skip_spaces (infile)) && c != ']') { ungetc (c, infile); list_counter++; - rtx_list_link = (struct rtx_list *) - alloca (sizeof (struct rtx_list)); - rtx_list_link->value = read_rtx (infile); - if (next_rtx == 0) - list_rtx = rtx_list_link; - else - next_rtx->next = rtx_list_link; - next_rtx = rtx_list_link; - rtx_list_link->next = 0; + obstack_ptr_grow (&vector_stack, (PTR) read_rtx (infile)); } - /* get vector length and allocate it */ - XVEC (return_rtx, i) = (list_counter - ? rtvec_alloc (list_counter) : NULL_RTVEC); if (list_counter > 0) { - next_rtx = list_rtx; - for (j = 0; j < list_counter; j++, - next_rtx = next_rtx->next) - XVECEXP (return_rtx, i, j) = next_rtx->value; + return_vec = rtvec_alloc (list_counter); + memcpy (&return_vec->elem[0], obstack_finish (&vector_stack), + list_counter * sizeof (rtx)); } + XVEC (return_rtx, i) = return_vec; + obstack_free (&vector_stack, NULL); /* close bracket gotten */ } break; |