From b0eaa5b4935b73088b423d2d078a4b361c62e288 Mon Sep 17 00:00:00 2001 From: Thomas Koenig Date: Tue, 28 Feb 2012 10:10:12 +0000 Subject: re PR tree-optimization/52307 (Segmentation fault in Lapack with -O3 -floop-flatten -floop-strip-mine) 2012-02-28 Thomas Koenig PR tree-optimization/53207 * doc/invoke.texi: Document as experimental and relying on graphite. From-SVN: r184623 --- gcc/doc/invoke.texi | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'gcc/doc') diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 7d4926a..d69f1fb 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -7289,8 +7289,12 @@ dead code elimination in loops. @item -floop-flatten @opindex floop-flatten Removes the loop nesting structure: transforms the loop nest into a -single loop. This transformation can be useful to vectorize all the -levels of the loop nest. +single loop. This transformation can be useful as an enablement +transform for vectorization and parallelization. This feature +is experimental. +To use this code transformation, GCC has to be configured +with @option{--with-ppl} and @option{--with-cloog} to enable the +Graphite loop transformation infrastructure. @item -floop-parallelize-all @opindex floop-parallelize-all -- cgit v1.1