* tree-ssa-loop-ivopts.c: New file.

[pf3gnuchains/gcc-fork.git] / gcc / params.def

diff --git a/gcc/params.def b/gcc/params.def
index 4b5a9ce..845b8d2 100644 (file)
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -306,6 +306,12 @@ DEFPARAM(PARAM_MAX_CROSSJUMP_EDGES,
         "The maximum number of incoming edges to consider for crossjumping",
         100)
 
+/* The minimum number of matching instructions to consider for crossjumping.  */
+DEFPARAM(PARAM_MIN_CROSSJUMP_INSNS,
+     "min-crossjump-insns",
+     "The minimum number of matching instructions to consider for crossjumping",
+     5)
+
 /* The maximum length of path considered in cse.  */
 DEFPARAM(PARAM_MAX_CSE_PATH_LENGTH,
         "max-cse-path-length",
@@ -319,6 +325,23 @@ DEFPARAM(PARAM_LIM_EXPENSIVE,
         "The minimum cost of an expensive expression in the loop invariant motion",
         20)
 
+/* Bound on number of candidates for induction variables below that
+   all candidates are considered for each use in induction variable
+   optimizations.  */
+
+DEFPARAM(PARAM_IV_CONSIDER_ALL_CANDIDATES_BOUND,
+        "iv-consider-all-candidates-bound",
+        "Bound on number of candidates below that all candidates are considered in iv optimizations",
+        30)
+
+/* The induction variable optimizations give up on loops that contain more
+   induction variable uses.  */
+
+DEFPARAM(PARAM_IV_MAX_CONSIDERED_USES,
+        "iv-max-considered-uses",
+        "Bound on number of iv uses in loop optimized in iv optimizations",
+        250)
+
 /* The product of the next two is used to decide whether or not to
    use .GLOBAL_VAR.  See tree-dfa.c.  */
 DEFPARAM(PARAM_GLOBAL_VAR_THRESHOLD,
@@ -373,6 +396,14 @@ DEFPARAM(PARAM_MAX_SCHED_REGION_INSNS,
         "The maximum number of insns in a region to be considered for interblock scheduling",
         100)
 
+/* INTEGER_CST nodes are shared for values [{-1,0} .. N) for
+   {signed,unsigned} integral types.  This determines N.
+   Experimentation shows 256 to be a good value.  */
+DEFPARAM (PARAM_INTEGER_SHARE_LIMIT,
+         "integer-share-limit",
+         "The upper bound for sharing integer constants",
+         256)
+
 /*
 Local variables:
 mode:c