diff options
Diffstat (limited to 'gcc/genconfig.c')
| -rw-r--r-- | gcc/genconfig.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/gcc/genconfig.c b/gcc/genconfig.c index 6508c39..e7964ab 100644 --- a/gcc/genconfig.c +++ b/gcc/genconfig.c @@ -42,6 +42,9 @@ static int have_peephole2_flag; /* Maximum number of insns seen in a split. */ static int max_insns_per_split = 1; +/* Maximum number of input insns for peephole2. */ +static int max_insns_per_peep2; + static int clobbers_seen_this_insn; static int dup_operands_seen_this_insn; @@ -239,6 +242,26 @@ gen_peephole (peep) walk_insn_part (XVECEXP (peep, 0, i), 1, 0); } +static void +gen_peephole2 (peep) + rtx peep; +{ + int i, n; + + /* Look through the patterns that are matched + to compute the maximum operand number. */ + for (i = XVECLEN (peep, 0) - 1; i >= 0; --i) + walk_insn_part (XVECEXP (peep, 0, i), 1, 0); + + /* Look at the number of insns this insn can be matched from. */ + for (i = XVECLEN (peep, 0) - 1, n = 0; i >= 0; --i) + if (GET_CODE (XVECEXP (peep, 0, i)) != MATCH_DUP + && GET_CODE (XVECEXP (peep, 0, i)) != MATCH_SCRATCH) + n++; + if (n > max_insns_per_peep2) + max_insns_per_peep2 = n; +} + extern int main PARAMS ((int, char **)); int @@ -289,7 +312,7 @@ from the machine description file `md'. */\n\n"); case DEFINE_PEEPHOLE2: have_peephole2_flag = 1; - gen_split (desc); + gen_peephole2 (desc); break; case DEFINE_PEEPHOLE: @@ -302,9 +325,8 @@ from the machine description file `md'. */\n\n"); } } - printf ("\n#define MAX_RECOG_OPERANDS %d\n", max_recog_operands + 1); - - printf ("\n#define MAX_DUP_OPERANDS %d\n", max_dup_operands); + printf ("#define MAX_RECOG_OPERANDS %d\n", max_recog_operands + 1); + printf ("#define MAX_DUP_OPERANDS %d\n", max_dup_operands); /* This is conditionally defined, in case the user writes code which emits more splits than we can readily see (and knows s/he does it). */ @@ -328,7 +350,10 @@ from the machine description file `md'. */\n\n"); printf ("#define HAVE_peephole 1\n"); if (have_peephole2_flag) - printf ("#define HAVE_peephole2 1\n"); + { + printf ("#define HAVE_peephole2 1\n"); + printf ("#define MAX_INSNS_PER_PEEP2 %d\n", max_insns_per_peep2); + } fflush (stdout); return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |