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| author | Jeff Law <law@gcc.gnu.org> | 1993-04-01 17:38:33 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1993-04-01 17:38:33 -0700 |
| commit | ca104c130db31bfa029fd876932e29bd34cdad10 (patch) | |
| tree | 4d3e2f38a4b878700cbf11fa329755e262a1acdc | |
| parent | 2f9e2a13ecebcac5c213c7fe07d3742de8d7539a (diff) | |
| download | gcc-ca104c130db31bfa029fd876932e29bd34cdad10.zip gcc-ca104c130db31bfa029fd876932e29bd34cdad10.tar.gz gcc-ca104c130db31bfa029fd876932e29bd34cdad10.tar.bz2 | |
reorg.c (redundant_insn_p): Stop searching for a redundant insn if an INSN or JUMP_INSN with delayed...
* reorg.c (redundant_insn_p): Stop searching for a redundant
insn if an INSN or JUMP_INSN with delayed effects is
encountered.
From-SVN: r3989
| -rw-r--r-- | gcc/reorg.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/gcc/reorg.c b/gcc/reorg.c index 787d9ff..a125a82 100644 --- a/gcc/reorg.c +++ b/gcc/reorg.c @@ -1729,11 +1729,27 @@ redundant_insn_p (insn, target, delay_list) if (GET_CODE (pat) == SEQUENCE) { - /* Stop for a CALL and its delay slots because it difficult to track - its resource needs correctly. */ + /* Stop for a CALL and its delay slots because it is difficult to + track its resource needs correctly. */ if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN) return 0; + /* Stop for an INSN or JUMP_INSN with delayed effects and its delay + slots because it is difficult to track its resource needs + correctly. */ + +#ifdef INSN_SETS_ARE_DELAYED + if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0))) + return 0; +#endif + +#ifdef INSN_REFERENCES_ARE_DELAYED + if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0))) + return 0; +#endif + + /* See if any of the insns in the delay slot match, updating + resource requirements as we go. */ for (i = XVECLEN (pat, 0) - 1; i > 0; i--) if (GET_CODE (XVECEXP (pat, 0, i)) == GET_CODE (insn) && rtx_equal_p (PATTERN (XVECEXP (pat, 0, i)), ipat)) @@ -1816,6 +1832,19 @@ redundant_insn_p (insn, target, delay_list) if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN) return 0; + /* If this this is an INSN or JUMP_INSN with delayed effects, it + is hard to track the resource needs properly, so give up. */ + +#ifdef INSN_SETS_ARE_DELAYED + if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0))) + return 0; +#endif + +#ifdef INSN_REFERENCES_ARE_DELAYED + if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0))) + return 0; +#endif + /* See if any of the insns in the delay slot match, updating resource requirements as we go. */ for (i = XVECLEN (pat, 0) - 1; i > 0; i--) |