See assembly output for gcc.target/cris/rld-legit2.c (here for cris-axis-elf):
_g:
subq 4,$sp
move $srp,[$sp]
subq 40,$sp
movem $r8,[$sp]
move $r10,$srp
move.d $r11,[$sp+36]
move $srp,$r9
addq 2,$r9
move $r9,$srp
subq 2,$r9
move.w [$r9+],$r11
move.w [$r9+],$r12
movs.w $r12,$r12
move.d [$sp+36],$r13
clear.b [$r12+$r13.b]
move $srp,$r10
movem [$sp+],$r8
addq 4,$sp
jump [$sp+]
Note the two post-increments; the second one is used and gets the wrong value.
(A failing executable test-case can trivially be constructed and will be.)
Reload seems to need two rounds, but the emitted reload insns for each pass
is left around. This is exposed but not actually caused by the fix for
PR middle-end/24912.
--
Summary: reload leaves insns from earlier passes around: fatal
for postinc
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hp at gcc dot gnu dot org
GCC target triplet: cris-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25335
