diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 9396959..366ada7 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -646,12 +646,21 @@ combine_instructions (f, nregs) /* Try each sequence of three linked insns ending with this one. */ for (links = LOG_LINKS (insn); links; links = XEXP (links, 1)) - for (nextlinks = LOG_LINKS (XEXP (links, 0)); nextlinks; - nextlinks = XEXP (nextlinks, 1)) - if ((next = try_combine (insn, XEXP (links, 0), - XEXP (nextlinks, 0), - &new_direct_jump_p)) != 0) - goto retry; + { + rtx link = XEXP (links, 0); + + /* If the linked insn has been replaced by a note, then there + is no point in persuing this chain any further. */ + if (GET_CODE (link) == NOTE) + break; + + for (nextlinks = LOG_LINKS (link); + nextlinks; + nextlinks = XEXP (nextlinks, 1)) + if ((next = try_combine (insn, XEXP (links, 0), + XEXP (nextlinks, 0))) != 0) + goto retry; + } #ifdef HAVE_cc0 /* Try to combine a jump insn that uses CC0 |