diff options
Diffstat (limited to 'gcc/read-rtl.c')
| -rw-r--r-- | gcc/read-rtl.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/gcc/read-rtl.c b/gcc/read-rtl.c index fe0c7a4044a..db0b3d7d3fb 100644 --- a/gcc/read-rtl.c +++ b/gcc/read-rtl.c @@ -1066,16 +1066,20 @@ check_code_macro (struct mapping *macro, FILE *infile) bellwether_codes[macro->index] = bellwether; } -/* Read an rtx in printed representation from INFILE - and return an actual rtx in core constructed accordingly. +/* Read an rtx in printed representation from INFILE and store its + core representation in *X. Also store the line number of the + opening '(' in *LINENO. Return true on success or false if the + end of file has been reached. + read_rtx is not used in the compiler proper, but rather in the utilities gen*.c that construct C code from machine descriptions. */ -rtx -read_rtx (FILE *infile) +bool +read_rtx (FILE *infile, rtx *x, int *lineno) { static rtx queue_head, queue_next; - rtx return_rtx; + static int queue_lineno; + int c; /* Do one-time initialization. */ if (queue_head == 0) @@ -1087,8 +1091,13 @@ read_rtx (FILE *infile) if (queue_next == 0) { - queue_next = queue_head; + c = read_skip_spaces (infile); + if (c == EOF) + return false; + ungetc (c, infile); + queue_next = queue_head; + queue_lineno = read_rtx_lineno; XEXP (queue_next, 0) = read_rtx_1 (infile); XEXP (queue_next, 1) = 0; @@ -1096,10 +1105,11 @@ read_rtx (FILE *infile) htab_traverse (codes.macros, apply_macro_traverse, queue_next); } - return_rtx = XEXP (queue_next, 0); + *x = XEXP (queue_next, 0); + *lineno = queue_lineno; queue_next = XEXP (queue_next, 1); - return return_rtx; + return true; } /* Subroutine of read_rtx that reads one construct from INFILE but |