re PR middle-end/86095 (documentation for -Wunsafe-loop-optimizations references…

re PR middle-end/86095 (documentation for -Wunsafe-loop-optimizations references options which have no effect any more)

	PR middle-end/86095
	* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
	documented as preserved for backward compatibility only.
	* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.

From-SVN: r261679

gcc/ChangeLog

 2018-06-16  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/86095
+	* common.opt (Wunsafe-loop-optimizations): Add Ignore, remove Var,
+	documented as preserved for backward compatibility only.
+	* doc/invoke.texi: Remove -Wunsafe-loop-optimizations documentation.
+
 	PR rtl-optimization/86108
 	* bb-reorder.c (create_forwarder_block): Renamed to ...
 	(create_eh_forwarder_block): ... this.  Split OLD_BB after labels and

gcc/common.opt

@@ -646,8 +646,8 @@ Common Var(warn_null_dereference) Warning
 Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior.
 
 Wunsafe-loop-optimizations
-Common Var(warn_unsafe_loop_optimizations) Warning
-Warn if the loop cannot be optimized due to nontrivial assumptions.
+Common Ignore Warning
+Does nothing. Preserved for backward compatibility.
 
 Wmissing-noreturn
 Common Warning Alias(Wsuggest-attribute=noreturn)

gcc/doc/invoke.texi

@@ -323,7 +323,7 @@ Objective-C and Objective-C++ Dialects}.
 -Wswitch-unreachable  -Wsync-nand @gol
 -Wsystem-headers  -Wtautological-compare  -Wtrampolines  -Wtrigraphs @gol
 -Wtype-limits  -Wundef @gol
--Wuninitialized  -Wunknown-pragmas  -Wunsafe-loop-optimizations @gol
+-Wuninitialized  -Wunknown-pragmas @gol
 -Wunsuffixed-float-constants  -Wunused  -Wunused-function @gol
 -Wunused-label  -Wunused-local-typedefs  -Wunused-macros @gol
 -Wunused-parameter  -Wno-unused-result @gol
@@ -6007,14 +6007,6 @@ If the stack usage is (partly) dynamic and not bounded, it's:
 @end smallexample
 @end itemize
 
-@item -Wunsafe-loop-optimizations
-@opindex Wunsafe-loop-optimizations
-@opindex Wno-unsafe-loop-optimizations
-Warn if the loop cannot be optimized because the compiler cannot
-assume anything on the bounds of the loop indices.  With
-@option{-funsafe-loop-optimizations} warn if the compiler makes
-such assumptions.
-
 @item -Wno-pedantic-ms-format @r{(MinGW targets only)}
 @opindex Wno-pedantic-ms-format
 @opindex Wpedantic-ms-format