graphite.c (graphite_apply_transformations): Check for -fgraphite-identity.

2008-10-23  Tobias Grosser  <grosser@fim.uni-passau.de>

	* graphite.c (graphite_apply_transformations): Check for
	-fgraphite-identity.
	* toplev.c (process_options): Add graphite_identity.
	* tree-ssa-loop.c (gate_graphite_transforms): Add graphite_identity.

From-SVN: r141325

1 files changed, 7 insertions, 11 deletions

diff --git a/gcc/graphite.c b/gcc/graphite.c
index 18174ee..a14dd14 100644
--- a/gcc/graphite.c
+++ b/gcc/graphite.c
@@ -5068,17 +5068,13 @@ graphite_apply_transformations (scop_p scop)
   if (flag_loop_block)
     transform_done = graphite_trans_scop_block (scop);
 
-#if 0 && ENABLE_CHECKING
-  /* When the compiler is configured with ENABLE_CHECKING, always
-     generate code, even if we did not apply any transformation.  This
-     provides better code coverage of the backend code generator.
-
-     This also allows to check the performance for an identity
-     transform: GIMPLE -> GRAPHITE -> GIMPLE; and the output of CLooG
-     is never an identity: if CLooG optimizations are not disabled,
-     the CLooG output is always optimized in control flow.  */
-  transform_done = true;
-#endif
+  /* Generate code even if we did not apply any real transformation.
+     This also allows to check the performance for the identity
+     transformation: GIMPLE -> GRAPHITE -> GIMPLE
+     Keep in mind that CLooG optimizes in control, so the loop structure
+     may change, even if we only use -fgraphite-identity.  */ 
+  if (flag_graphite_identity)
+    transform_done = true;
 
   return transform_done;
 }