invoke.texi (fipa-cp, [...]): Add documentation.

2007-12-03  Razya Ladelsky <razya@il.ibm.com>

    * doc/invoke.texi (fipa-cp, fipa-matrix-reorg): Add documentation.

From-SVN: r130580

gcc/ChangeLog

+2007-12-03  Razya Ladelsky <razya@il.ibm.com>
+
+    * doc/invoke.texi (fipa-cp, fipa-matrix-reorg): Add documentation.
+
+
 2007-12-03  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/34317

gcc/doc/invoke.texi

@@ -328,7 +328,8 @@ Objective-C and Objective-C++ Dialects}.
 -ffunction-sections -fgcse -fgcse-after-reload -fgcse-las -fgcse-lm @gol
 -fgcse-sm -fif-conversion -fif-conversion2 -finline-functions @gol
 -finline-functions-called-once -finline-limit=@var{n} @gol
--finline-small-functions -fipa-pta -fipa-pure-const -fipa-reference @gol
+-finline-small-functions -fipa-cp -fipa-marix-reorg -fipa-pta @gol 
+-fipa-pure-const -fipa-reference @gol
 -fipa-type-escape -fivopts -fkeep-inline-functions -fkeep-static-consts @gol
 -fmerge-all-constants -fmerge-constants -fmodulo-sched @gol
 -fmodulo-sched-allow-regmoves -fmove-loop-invariants -fmudflap @gol
@@ -5715,6 +5716,29 @@ Enabled by default at @option{-O} and higher.
 @opindex fipa-pta
 Perform interprocedural pointer analysis.
 
+@item -fipa-cp
+@opindex fipa-cp
+Perform interprocedural constant propagation.
+This optimization analyzes the program to determine when values passed
+to functions are constants and then optimizes accordingly.  
+This optimization can substantially increase performance
+if the application has constants passed to functions, but
+because this optimization can create multiple copies of functions,
+it may significantly increase code size.
+
+@item -fipa-matrix-reorg
+@opindex fipa-matrix-reorg
+Perform matrix flattening and transposing.
+Matrix flattening tries to replace a m-dimensional matrix 
+with its equivalent n-dimensional matrix, where n < m.
+This reduces the level of indirection needed for accessing the elements
+of the matrix. The second optimization is matrix transposing that
+attemps to change the order of the matrix's dimensions in order to 
+improve cache locality.
+Both optimizations need fwhole-program flag. 
+Transposing is enabled only if profiling information is avaliable.
+
+
 @item -ftree-sink
 @opindex ftree-sink
 Perform forward store motion  on trees.  This flag is