------- Comment #6 from mikpe at it dot uu dot se 2010-05-24 22:24 -------
The stage 3 comparison failure on ARM is as follows:
...
Bootstrap comparison failure!
libiberty/pic/cp-demangle.o differs
Comparing the disassembly listings of prev-libiberty/pic/cp-demangle.o and
libiberty/pic/cp-demangle.o yields:
@@ -1,5 +1,5 @@
-prev-libiberty/pic/cp-demangle.o: file format elf32-littlearm
+libiberty/pic/cp-demangle.o: file format elf32-littlearm
Disassembly of section .text:
@@ -4751,12 +4751,12 @@
4954: e58d0004 str r0, [sp, #4]
4958: eaffffe7 b 48fc <cplus_demangle_type+0x21c>
495c: e3a01014 mov r1, #20 ; 0x14
- 4960: e0010193 mul r1, r3, r1
- 4964: e59f38e8 ldr r3, [pc, #2280] ; 5254
<cplus_demangle_type+0xb74>
- 4968: e2411e79 sub r1, r1, #1936 ; 0x790
- 496c: e2411004 sub r1, r1, #4 ; 0x4
- 4970: e7923003 ldr r3, [r2, r3]
- 4974: e0913003 adds r3, r1, r3
+ 4960: e0030391 mul r3, r1, r3
+ 4964: e59f18e8 ldr r1, [pc, #2280] ; 5254
<cplus_demangle_type+0xb74>
+ 4968: e2433e79 sub r3, r3, #1936 ; 0x790
+ 496c: e2433004 sub r3, r3, #4 ; 0x4
+ 4970: e7922001 ldr r2, [r2, r1]
+ 4974: e0923003 adds r3, r2, r3
4978: 0a000215 beq 51d4 <cplus_demangle_type+0xaf4>
497c: e5942014 ldr r2, [r4, #20]
4980: e5941018 ldr r1, [r4, #24]
So it's not just two swapped source operands in an arithmetic instruction as on
sparc, but also different (still valid) register assignment.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44255
