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[05/10] Add fixme comment.

Message ID 1311273070-12128-6-git-send-email-sebpop@gmail.com
State New
Headers show

Commit Message

Sebastian Pop July 21, 2011, 6:31 p.m. UTC 
2011-07-21  Sebastian Pop  <sebastian.pop@amd.com>

	* graphite-clast-to-gimple.c (clast_get_body_of_loop): Add fixme
	comment.
---
 gcc/ChangeLog                  |    5 +++++
 gcc/graphite-clast-to-gimple.c |   19 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletions(-)
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Patch

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e6abcec..eec05b8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@ 
 2011-07-21  Sebastian Pop  <sebastian.pop@amd.com>
 
+	* graphite-clast-to-gimple.c (clast_get_body_of_loop): Add fixme
+	comment.
+
+2011-07-21  Sebastian Pop  <sebastian.pop@amd.com>
+
 	* graphite-clast-to-gimple.c (struct ivs_params): New.
 	(clast_name_to_gcc): Use ivs_params to pass around parameters.
 	(clast_to_gcc_expression): Same.
diff --git a/gcc/graphite-clast-to-gimple.c b/gcc/graphite-clast-to-gimple.c
index 099109a..b7bfaa8 100644
--- a/gcc/graphite-clast-to-gimple.c
+++ b/gcc/graphite-clast-to-gimple.c
@@ -640,7 +640,24 @@  compute_type_for_level (poly_bb_p pbb, int level)
 }
 
 /* Walks a CLAST and returns the first statement in the body of a
-   loop.  */
+   loop.
+
+   FIXME: This function should not be used to get a PBB in the STMT
+   loop in order to find out the iteration domain of the loop: the
+   counter example from Tobias is:
+
+   | for (i = 0; i < 100; i++)
+   |   {
+   |     if (i == 0)
+   |       S1;
+   |     S2;
+   |   }
+
+   This function would return S1 whose iteration domain contains only
+   one point "i = 0", whereas the iteration domain of S2 has 100 points.
+
+   This should be implemented using some functionality existing in
+   CLooG-ISL.  */
 
 static struct clast_user_stmt *
 clast_get_body_of_loop (struct clast_stmt *stmt)