diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 274a2d9..4b6e39f 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4673,15 +4673,25 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, return newi2pat ? i2 : i3; } -/* Undo all the modifications recorded in undobuf. */ +/* Get a marker for undoing to the current state. */ + +static void * +get_undo_marker (void) +{ + return undobuf.undos; +} + +/* Undo the modifications up to the marker. */ static void -undo_all (void) +undo_to_marker (void *marker) { struct undo *undo, *next; - for (undo = undobuf.undos; undo; undo = next) + for (undo = undobuf.undos; undo != marker; undo = next) { + gcc_assert (undo); + next = undo->next; switch (undo->kind) { @@ -4705,7 +4715,15 @@ undo_all (void) undobuf.frees = undo; } - undobuf.undos = 0; + undobuf.undos = (struct undo *) marker; +} + +/* Undo all the modifications recorded in undobuf. */ + +static void +undo_all (void) +{ + undo_to_marker (0); } /* We've committed to accepting the changes we made. Move all |