diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index e9763d44d8d..32d1f2c5334 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -7592,6 +7592,16 @@ Split paths leading to loop backedges. This can improve dead code elimination and common subexpression elimination. This is enabled by default at @option{-O2} and above. +@item -ftree-type-promote +@opindex ftree-type-promote +This pass applies type promotion to SSA names in the function and +inserts appropriate truncations to preserve the semantics. Idea of +this pass is to promote operations such a way that we can minimise +generation of subreg in RTL, that intern results in removal of +redundant zero/sign extensions. + +This optimization is enabled by default. + @item -fsplit-ivs-in-unroller @opindex fsplit-ivs-in-unroller Enables expression of values of induction variables in later iterations |