https://gcc.gnu.org/g:06bc3a734e88908cad1d3bf547a722b3f9597a0d
commit r15-4756-g06bc3a734e88908cad1d3bf547a722b3f9597a0d
Author: Andi Kleen <a...@gcc.gnu.org>
Date: Tue Oct 15 13:15:09 2024 -0700
Disable -fbit-tests and -fjump-tables at -O0
gcc/ChangeLog:
* common.opt: Enable -fbit-tests and -fjump-tables only at -O1.
* opts.cc (default_options_table): Dito.
Diff:
---
gcc/common.opt | 4 ++--
gcc/opts.cc | 2 ++
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/gcc/common.opt b/gcc/common.opt
index 12b25ff486de..70a22cdc71a4 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -2189,11 +2189,11 @@ Common Var(flag_ivopts) Init(1) Optimization
Optimize induction variables on trees.
fjump-tables
-Common Var(flag_jump_tables) Init(1) Optimization
+Common Var(flag_jump_tables) Init(0) Optimization
Use jump tables for sufficiently large switch statements.
fbit-tests
-Common Var(flag_bit_tests) Init(1) Optimization
+Common Var(flag_bit_tests) Init(0) Optimization
Use bit tests for sufficiently large switch statements.
fkeep-inline-functions
diff --git a/gcc/opts.cc b/gcc/opts.cc
index e810e30961b9..5d08e5ab2b54 100644
--- a/gcc/opts.cc
+++ b/gcc/opts.cc
@@ -611,6 +611,7 @@ static const struct default_options default_options_table[]
=
{ OPT_LEVELS_1_PLUS, OPT_fvar_tracking, NULL, 1 },
/* -O1 (and not -Og) optimizations. */
+ { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fbit_tests, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fbranch_count_reg, NULL, 1 },
#if DELAY_SLOTS
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fdelayed_branch, NULL, 1 },
@@ -619,6 +620,7 @@ static const struct default_options default_options_table[]
=
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fif_conversion2, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1
},
+ { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fjump_tables, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fmove_loop_invariants, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fmove_loop_stores, NULL, 1 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fssa_phiopt, NULL, 1 },
