diff options
Diffstat (limited to 'gcc/recog.c')
| -rw-r--r-- | gcc/recog.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/recog.c b/gcc/recog.c index 87f8137f302..f1d5dee6c46 100644 --- a/gcc/recog.c +++ b/gcc/recog.c @@ -2045,6 +2045,31 @@ adj_offsettable_operand (op, offset) abort (); } +/* Like extract_insn, but save insn extracted and don't extract again, when + called again for the same insn expecting that recog_data still contain the + valid information. This is used primary by gen_attr infrastructure that + often does extract insn again and again. */ +void +extract_insn_cached (insn) + rtx insn; +{ + if (recog_data.insn == insn && INSN_CODE (insn) >= 0) + return; + extract_insn (insn); + recog_data.insn = insn; +} +/* Do cached extract_insn, constrain_operand and complain about failures. + Used by insn_attrtab. */ +void +extract_constrain_insn_cached (insn) + rtx insn; +{ + extract_insn_cached (insn); + if (which_alternative == -1 + && !constrain_operands (reload_completed)) + fatal_insn_not_found (insn); +} + /* Analyze INSN and fill in recog_data. */ void @@ -2056,9 +2081,11 @@ extract_insn (insn) int noperands; rtx body = PATTERN (insn); + recog_data.insn = NULL; recog_data.n_operands = 0; recog_data.n_alternatives = 0; recog_data.n_dups = 0; + which_alternative = -1; switch (GET_CODE (body)) { @@ -2592,6 +2619,7 @@ constrain_operands (strict) which_alternative++; } + which_alternative = -1; /* If we are about to reject this, but we are not to test strictly, try a very loose test. Only return failure if it fails also. */ if (strict == 0) |