This might be related to PR20447 or PR18592.
$ m68k-linux-gcc -O -S iso-2022-cn-ext.i
iso-2022-cn-ext.i: In function ‘gconv’:
iso-2022-cn-ext.i:85: internal compiler error: output_operand: invalid
expression as operand
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
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Summary: [4.0/4.1 regression] ICE in output_operand: invalid
expression as operand
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schwab at suse dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: m68k-*-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20583