Introduce new alpha_inc pass, to avoid artificial duplicates.

1 files changed, 1 insertions, 10 deletions

diff --git a/doc/gperf.texi b/doc/gperf.texi
index 7f0499e..f47c706 100644
--- a/doc/gperf.texi
+++ b/doc/gperf.texi
@@ -993,7 +993,7 @@ through a search that minimizes the number of byte positions.
 @itemx --duplicates
 @cindex Duplicates
 Handle keywords whose selected byte sets hash to duplicate values.
-Duplicate hash values can occur for three reasons:
+Duplicate hash values can occur for two reasons:
 
 @itemize @bullet
 @item
@@ -1004,15 +1004,6 @@ the majority of keywords still require one probe into the table.  To
 overcome this problem, the option @samp{-m 50} should be used.
 
 @item
-Since the @code{gperf} generated hash function treats the bytes at
-different byte positions with equal weight, keywords that are permutations
-of each other can lead to the same hash function value if they are not
-disambiguated by the set of selected byte positions.  Sometimes even this
-is not possible; for example, the keyword set @{"xy", "yx", "xz", "zx"@}
-will always lead to duplicates, regardless how the selected byte positions
-are chosen.  You can use the option @samp{-D} to handle this rare case.
-
-@item
 Sometimes a set of keywords may have the same names, but possess different
 attributes.  With the -D option @code{gperf} treats all these keywords as
 part of an equivalence class and generates a perfect hash function with