------- Comment #4 from danglin at gcc dot gnu dot org 2007-10-22 00:43 ------- The actual code that is wrong is the following:
0x00010670 <main+176>: ldw 10(r20),r19 0x00010674 <main+180>: uaddcm r0,r23,r21 0x00010678 <main+184>: uaddcm r0,r24,r22 0x0001067c <main+188>: depw,z r19,30,31,r19 0x00010680 <main+192>: subi 1f,r22,r21 0x00010684 <main+196>: mtsar r21 0x00010688 <main+200>: depw,z r19,sar,32,r19 0x0001068c <main+204>: b,l 0x10648 <main+136>,r0 0x00010690 <main+208>: or r19,r21,r21 The 4.2 code is: 0x00010650 <main+192>: uaddcm r0,r21,ret0 0x00010654 <main+196>: uaddcm r0,r22,ret1 0x00010658 <main+200>: mtsar r22 0x0001065c <main+204>: ldw 10(r20),r20 0x00010660 <main+208>: ldw 4(r31),r19 0x00010664 <main+212>: subi 1f,ret1,ret1 0x00010668 <main+216>: shrpw r0,r19,sar,r24 0x0001066c <main+220>: depw,z r20,30,31,ret0 0x00010670 <main+224>: mtsar ret1 0x00010674 <main+228>: depw,z ret0,sar,32,ret0 0x00010678 <main+232>: b,l 0x10628 <main+152>,r0 0x0001067c <main+236>: or ret0,r24,r24 The 4.3 code is missing the load at 0x00010660 and the shift at 0x00010668. Also, the shift amount somehow ends up being or'ed into the result of the calculation (r21), leading to the abort. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33732
