Hello All:
This patch enable ree pass as a default pass for rs6000 target.
Bootstrapped and regtested for powerpc64-linux-gnu.
Thanks & Regards
Ajit
rs6000: Enable REE pass by default
Add ree pass as a default pass for rs6000 target for
O2 and above.
2023-05-16 Ajit Kumar Agarwal <aagar...@linux.ibm.com>
gcc/ChangeLog:
* common/config/rs6000/rs6000-common.cc: Add REE pass as a
default rs6000 target pass for O2 and above.
* doc/invoke.texi: Document -free
---
gcc/common/config/rs6000/rs6000-common.cc | 2 ++
gcc/doc/invoke.texi | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/gcc/common/config/rs6000/rs6000-common.cc
b/gcc/common/config/rs6000/rs6000-common.cc
index 2140c442ba9..968db215028 100644
--- a/gcc/common/config/rs6000/rs6000-common.cc
+++ b/gcc/common/config/rs6000/rs6000-common.cc
@@ -34,6 +34,8 @@ static const struct default_options
rs6000_option_optimization_table[] =
{ OPT_LEVELS_ALL, OPT_fsplit_wide_types_early, NULL, 1 },
/* Enable -fsched-pressure for first pass instruction scheduling. */
{ OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 },
+ /* Enable -free for zero extension and sign extension elimination.*/
+ { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
/* Enable -munroll-only-small-loops with -funroll-loops to unroll small
loops at -O2 and above by default. */
{ OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_funroll_loops, NULL, 1 },
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b92b8576027..168fcc88b1d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -12455,8 +12455,8 @@ Attempt to remove redundant extension instructions.
This is especially
helpful for the x86-64 architecture, which implicitly zero-extends in 64-bit
registers after writing to their lower 32-bit half.
-Enabled for Alpha, AArch64 and x86 at levels @option{-O2},
-@option{-O3}, @option{-Os}.
+Enabled for Alpha, AArch64, RS/6000, RISC-V, SPARC, h83000 and x86 at levels
+@option{-O2}, @option{-O3}, @option{-Os}.
@opindex fno-lifetime-dse
@opindex flifetime-dse
--
2.31.1
