https://gcc.gnu.org/g:2b44b11cae6847893bf4b7bc327d0d2913588006
commit r15-5984-g2b44b11cae6847893bf4b7bc327d0d2913588006
Author: Georg-Johann Lay <a...@gjlay.de>
Date: Fri Dec 6 11:52:16 2024 +0100
AVR: Disable generation of CRC lookup tables.
With -foptimize-crc, large lookup tables may be generated which
are places in .rodata (RAM). This patch disables such tables.
gcc/
* common/config/avr/avr-common.cc
(avr_option_optimization_table): Default to -fno-optimize-crc.
Diff:
---
gcc/common/config/avr/avr-common.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/common/config/avr/avr-common.cc
b/gcc/common/config/avr/avr-common.cc
index 9059e7d2b485..7a05e19a8bec 100644
--- a/gcc/common/config/avr/avr-common.cc
+++ b/gcc/common/config/avr/avr-common.cc
@@ -32,6 +32,8 @@ static const struct default_options
avr_option_optimization_table[] =
// The only effect of -fcaller-saves might be that it triggers
// a frame without need when it tries to be smart around calls.
{ OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 },
+ // Avoid large lookup tables in RAM from -foptimize-crc.
+ { OPT_LEVELS_ALL, OPT_foptimize_crc, NULL, 0 },
{ OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_mgas_isr_prologues, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_mmain_is_OS_task, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_mfuse_add_, NULL, 1 },
