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Diffstat (limited to 'gcc/ada/gnat_ugn.texi')
| -rw-r--r-- | gcc/ada/gnat_ugn.texi | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/ada/gnat_ugn.texi b/gcc/ada/gnat_ugn.texi index 7d573f7175e..e9b5a664791 100644 --- a/gcc/ada/gnat_ugn.texi +++ b/gcc/ada/gnat_ugn.texi @@ -3815,6 +3815,15 @@ if @option{-O2} is used. Suppresses inlining of subprograms local to the unit and called once from within it, which is enabled if @option{-O1} is used. +@item -fno-ivopts +@cindex @option{-fno-ivopts} (@command{gcc}) +Suppresses high-level loop induction variable optimizations, which are +enabled if @option{-O1} is used. These optimizations are generally +profitable but, for some specific cases of loops with numerous uses +of the iteration variable that follow a common pattern, they may end +up destroying the regularity that could be exploited at a lower level +and thus producing inferior code. + @item -fno-strict-aliasing @cindex @option{-fno-strict-aliasing} (@command{gcc}) Causes the compiler to avoid assumptions regarding non-aliasing |