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re PR tree-optimization/21765 (-free-vrp is undocumented.) 

PR 21765
	* doc/invoke.texi: Document -ftree-vrp.

From-SVN: r100495
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Diego Novillo 2005-06-02 17:13:26 +00:00 committed by Diego Novillo
parent ed3c16fbe6
commit 08873e963f
2 changed files with 21 additions and 0 deletions
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@ -1,3 +1,8 @@
2005-06-02 Diego Novillo <dnovillo@redhat.com>
PR 21765
* doc/invoke.texi: Document -ftree-vrp.
2005-06-02 Dorit Nuzman <dorit@il.ibm.com>
PR tree-optimization/21734

16
gcc/doc/invoke.texi
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@ -277,6 +277,7 @@ Objective-C and Objective-C++ Dialects}.
-fdump-tree-sra@r{[}-@var{n}@r{]} @gol
-fdump-tree-salias @gol
-fdump-tree-fre@r{[}-@var{n}@r{]} @gol
-fdump-tree-vrp@r{[}-@var{n}@r{]} @gol
-ftree-vectorizer-verbose=@var{n} @gol
-fdump-tree-storeccp@r{[}-@var{n}@r{]} @gol
-feliminate-dwarf2-dups -feliminate-unused-debug-types @gol
@ -4067,6 +4068,11 @@ file name.
Dump each function after applying vectorization of loops. The file name is
made by appending @file{.vect} to the source file name.
@item vrp
@opindex fdump-tree-vrp
Dump each function after Value Range Propagation (VRP). The file name
is made by appending @file{.vrp} to the source file name.
@item all
@opindex fdump-tree-all
Enable all the available tree dumps with the flags provided in this option.
@ -4321,6 +4327,7 @@ also turns on the following optimization flags:
-funit-at-a-time @gol
-falign-functions -falign-jumps @gol
-falign-loops -falign-labels @gol
-ftree-vrp @gol
-ftree-pre}
Please note the warning under @option{-fgcse} about
@ -4963,6 +4970,15 @@ optimization later. This is enabled by default at @option{-O} and higher.
@item -ftree-vectorize
Perform loop vectorization on trees.
@item -ftree-vrp
Perform Value Range Propagation on trees. This is similar to the
constant propagation pass, but instead of values, ranges of values are
propagated. This allows the optimizers to remove unnecessary range
checks like array bound checks and null pointer checks. This is
enabled by default at @option{-O2} and higher. Null pointer check
elimination is only done if @option{-fdelete-null-pointer-checks} is
enabled.
@item -ftracer
@opindex ftracer
Perform tail duplication to enlarge superblock size. This transformation