diff options
Diffstat (limited to 'toolchain/gcc/patches/4.4.7/931-avr32_disable_shifted_data_opt.patch')
| -rw-r--r-- | toolchain/gcc/patches/4.4.7/931-avr32_disable_shifted_data_opt.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/4.4.7/931-avr32_disable_shifted_data_opt.patch b/toolchain/gcc/patches/4.4.7/931-avr32_disable_shifted_data_opt.patch new file mode 100644 index 000000000..2003e97ae --- /dev/null +++ b/toolchain/gcc/patches/4.4.7/931-avr32_disable_shifted_data_opt.patch @@ -0,0 +1,32 @@ +--- a/gcc/config/avr32/avr32.c ++++ b/gcc/config/avr32/avr32.c +@@ -6726,7 +6726,28 @@ avr32_reorg_optimization (void) + } + } + +- if (TARGET_MD_REORG_OPTIMIZATION && (optimize_size || (optimize > 0))) ++ /* Disabled this optimization since it has a bug */ ++ /* In the case where the data instruction the shifted insn gets folded ++ * into is a branch destination, this breaks, i.e. ++ * ++ * add r8, r10, r8 << 2 ++ * 1: ++ * ld.w r11, r8[0] ++ * ... ++ * mov r8, sp ++ * rjmp 1b ++ * ++ * gets folded to: ++ * ++ * 1: ++ * ld.w r11, r10[r8 << 2] ++ * ... ++ * mov r8, sp ++ * rjmp 1b ++ * ++ * which is clearly wrong.. ++ */ ++ if (0 && TARGET_MD_REORG_OPTIMIZATION && (optimize_size || (optimize > 0))) + { + + /* Scan through all insns looking for shifted add operations */ |