+Mon Mar 29 20:52:47 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
+
+ * loop.c (maybe_eliminate_biv): For libcalls that set a giv, skip to
+ end of libcall.
+
Mon Mar 29 20:35:49 1999 J"orn Rennecke <amylaar@cygnus.co.uk>
* sh.md (mulsi3): Tag an extra REG_EQUAL note to the middle insn.
enum rtx_code code = GET_CODE (p);
rtx where = threshold >= insn_count ? loop_start : p;
+ /* If this is a libcall that sets a giv, skip ahead to its end. */
+ if (GET_RTX_CLASS (code) == 'i')
+ {
+ rtx note = find_reg_note (p, REG_LIBCALL, NULL_RTX);
+
+ if (note)
+ {
+ rtx last = XEXP (note, 0);
+ rtx set = single_set (last);
+
+ if (set && GET_CODE (SET_DEST (set)) == REG)
+ {
+ int regno = REGNO (SET_DEST (set));
+
+ if (REG_IV_TYPE (regno) == GENERAL_INDUCT
+ && REG_IV_INFO (regno)->src_reg == bl->biv->src_reg)
+ p = last;
+ }
+ }
+ }
if ((code == INSN || code == JUMP_INSN || code == CALL_INSN)
&& reg_mentioned_p (reg, PATTERN (p))
&& ! maybe_eliminate_biv_1 (PATTERN (p), p, bl, eliminate_p, where))