On 04/17/2016 08:59 PM, Jeff Law wrote:
invoke.texi has an independent list (probably incomplete! ;( of all the
things that -O2 enables. Make sure to add -frename-registers to that
list and this is Ok for the trunk (gcc-7).
This is what I committed.
Bernd
Index: gcc/ChangeLog
===================================================================
--- gcc/ChangeLog (revision 235441)
+++ gcc/ChangeLog (working copy)
@@ -1,3 +1,10 @@
+2016-04-26 Bernd Schmidt <bschm...@redhat.com>
+
+ PR rtl-optimization/57193
+ * opts.c (default_options_table): Add OPT_frename_registers at -O2
+ and above.
+ * doc/invoke.texi (-frename-registers, -O2): Update documentation.
+
2016-04-26 Bin Cheng <bin.ch...@arm.com>
* tree-if-conv.c (any_pred_load_store): New static variable.
Index: gcc/opts.c
===================================================================
--- gcc/opts.c (revision 235441)
+++ gcc/opts.c (working copy)
@@ -498,6 +498,7 @@ static const struct default_options defa
{ OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_freorder_blocks_algorithm_, NULL,
REORDER_BLOCKS_ALGORITHM_STC },
+ { OPT_LEVELS_2_PLUS, OPT_frename_registers, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
Index: gcc/doc/invoke.texi
===================================================================
--- gcc/doc/invoke.texi (revision 235441)
+++ gcc/doc/invoke.texi (working copy)
@@ -6255,6 +6255,7 @@ also turns on the following optimization
-foptimize-strlen @gol
-fpartial-inlining @gol
-fpeephole2 @gol
+-frename-registers @gol
-freorder-blocks-algorithm=stc @gol
-freorder-blocks-and-partition -freorder-functions @gol
-frerun-cse-after-loop @gol
@@ -8562,7 +8563,8 @@ debug information format adopted by the
make debugging impossible, since variables no longer stay in
a ``home register''.
-Enabled by default with @option{-funroll-loops} and @option{-fpeel-loops}.
+Enabled by default with @option{-funroll-loops} and @option{-fpeel-loops},
+and also enabled at levels @option{-O2} and @option{-O3}.
@item -fschedule-fusion
@opindex fschedule-fusion
