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diff src/share/vm/opto/c2_globals.hpp @ 418:72c5366e5d86

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6743900: frequency based block layout Summary: post-register allocation pass that drives block layout by edge frequencies Reviewed-by: never, kvn
author rasbold
date Thu, 06 Nov 2008 14:59:10 -0800
parents 40b69ca33f4b
children a1980da045cc
line wrap: on
line diff
--- a/src/share/vm/opto/c2_globals.hpp	Thu Oct 30 17:08:48 2008 -0700
+++ b/src/share/vm/opto/c2_globals.hpp	Thu Nov 06 14:59:10 2008 -0800
@@ -396,5 +396,15 @@
                                                                             \
   diagnostic(intx, DominatorSearchLimit, 1000,                              \
           "Iterations limit in Node::dominates")                            \
+                                                                            \
+  product(bool, BlockLayoutByFrequency, true,                               \
+          "Use edge frequencies to drive block ordering")                   \
+                                                                            \
+  product(intx, BlockLayoutMinDiamondPercentage, 20,                        \
+          "Miniumum %% of a successor (predecessor) for which block layout "\
+          "a will allow a fork (join) in a single chain")                   \
+                                                                            \
+  product(bool, BlockLayoutRotateLoops, false,                              \
+          "Allow back branches to be fall throughs in the block layour")    \
 
 C2_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG)