invoke.texi (-fvar-tracking-assignments): New.

[thirdparty/gcc.git] / gcc / rtlanal.c

diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 27a46d9e73d58b0388cd6a3bce8ab90d838f8336..7a734eb66e5f1f01fce02c52af018f6995baf032 100644 (file)
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -741,7 +741,7 @@ reg_used_between_p (const_rtx reg, const_rtx from_insn, const_rtx to_insn)
     return 0;
 
   for (insn = NEXT_INSN (from_insn); insn != to_insn; insn = NEXT_INSN (insn))
-    if (INSN_P (insn)
+    if (NONDEBUG_INSN_P (insn)
        && (reg_overlap_mentioned_p (reg, PATTERN (insn))
           || (CALL_P (insn) && find_reg_fusage (insn, USE, reg))))
       return 1;
@@ -2148,6 +2148,7 @@ side_effects_p (const_rtx x)
     case SCRATCH:
     case ADDR_VEC:
     case ADDR_DIFF_VEC:
+    case VAR_LOCATION:
       return 0;
 
     case CLOBBER:
@@ -4725,7 +4726,11 @@ canonicalize_condition (rtx insn, rtx cond, int reverse, rtx *earliest,
         stop if it isn't a single set or if it has a REG_INC note because
         we don't want to bother dealing with it.  */
 
-      if ((prev = prev_nonnote_insn (prev)) == 0
+      do
+       prev = prev_nonnote_insn (prev);
+      while (prev && DEBUG_INSN_P (prev));
+
+      if (prev == 0
          || !NONJUMP_INSN_P (prev)
          || FIND_REG_INC_NOTE (prev, NULL_RTX)
          /* In cfglayout mode, there do not have to be labels at the