http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59460
Bug ID: 59460
Summary: [4.9 Regression] ICE with -mips16 and
__attribute__((nomips16))
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: robert.suchanek at imgtec dot com
Target: mips16
A number of failures started to appear on the trunk for mips-elf target
(possibly other targets too) and all of the new failures are related
to the fix for PR58115. The following is a narrowed testcase that triggers
an ICE.
It crashes when attributes for a function try to override -mips16 argument
given on the commandline. I found another problem with the testcase when the
function takes an argument of type v2sf: the compiler segfaults due to
recursive calls, but this also points to the fix.
$ cat mips-ps-2.c
typedef float v2sf __attribute__ ((vector_size(8)));
__attribute__((nomips16)) v2sf foo () {}
$ mips-elf-gcc -mips32r2 -mfp64 -mips16 -mpaired-single -c mips-ps-2.c
mips-ps-2.c: In function ‘foo’:
mips-ps-2.c:3:1: internal compiler error: in emit_move_multi_word, at
expr.c:3518
__attribute__((nomips16)) v2sf foo () {}
^
0x736d43 emit_move_multi_word
../../gcc-trunk/gcc/expr.c:3518
0x736061 emit_move_insn(rtx_def*, rtx_def*)
../../gcc-trunk/gcc/expr.c:3650
0x7b5d0a expand_function_end()
../../gcc-trunk/gcc/function.c:5120
0x65fef0 construct_exit_block
../../gcc-trunk/gcc/cfgexpand.c:5282
0x65fef0 gimple_expand_cfg
../../gcc-trunk/gcc/cfgexpand.c:5737
0x65fef0 execute
../../gcc-trunk/gcc/cfgexpand.c:5932
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
