mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-18 11:54:03 +02:00
33 lines
835 B
Diff
33 lines
835 B
Diff
|
--- 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 */
|