+Tue Oct 7 09:54:35 1997 Jeffrey A Law (law@cygnus.com)
+
+ * haifa-sched.c (schedule_block): If the first real insn in a
+ block has any special notes attached to it, remove them.
+
Tue Oct 7 09:48:51 1997 Richard Henderson <rth@cygnus.com>
* alpha.h (FLOAT_STORE_FLAG_VALUE): It's 2.0 not 0.5.
had different notions of what the "head" insn was. */
get_block_head_tail (bb, &head, &tail);
+ /* Interblock scheduling could have moved the original head insn from this
+ block into a proceeding block. This may also cause schedule_block and
+ compute_forward_dependences to have different notions of what the
+ "head" insn was.
+
+ If the interblock movement happened to make this block start with
+ some notes (LOOP, EH or SETJMP) before the first real insn, then
+ HEAD will have various special notes attached to it which must be
+ removed so that we don't end up with extra copies of the notes. */
+ if (GET_RTX_CLASS (GET_CODE (head)) == 'i')
+ {
+ rtx note;
+
+ for (note = REG_NOTES (head); note; note = XEXP (note, 1))
+ if (REG_NOTE_KIND (note) == REG_DEAD
+ && GET_CODE (XEXP (note, 0)) == CONST_INT)
+ remove_note (head, note);
+ }
+
next_tail = NEXT_INSN (tail);
prev_head = PREV_INSN (head);