[package] libpcap: explicitely disable libnl support to prevent different build resul...
[openwrt.git] / toolchain / gcc / patches / 4.4.6 / 931-avr32_disable_shifted_data_opt.patch
1 --- a/gcc/config/avr32/avr32.c
2 +++ b/gcc/config/avr32/avr32.c
3 @@ -6726,7 +6726,28 @@ avr32_reorg_optimization (void)
4 }
5 }
6
7 - if (TARGET_MD_REORG_OPTIMIZATION && (optimize_size || (optimize > 0)))
8 + /* Disabled this optimization since it has a bug */
9 + /* In the case where the data instruction the shifted insn gets folded
10 + * into is a branch destination, this breaks, i.e.
11 + *
12 + * add r8, r10, r8 << 2
13 + * 1:
14 + * ld.w r11, r8[0]
15 + * ...
16 + * mov r8, sp
17 + * rjmp 1b
18 + *
19 + * gets folded to:
20 + *
21 + * 1:
22 + * ld.w r11, r10[r8 << 2]
23 + * ...
24 + * mov r8, sp
25 + * rjmp 1b
26 + *
27 + * which is clearly wrong..
28 + */
29 + if (0 && TARGET_MD_REORG_OPTIMIZATION && (optimize_size || (optimize > 0)))
30 {
31
32 /* Scan through all insns looking for shifted add operations */
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