https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #21 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
I've run check-gcc for sh-lra branch on sh4-unknown-linux-gnu
and got
=== gcc Summary ===
# of expected passes 83035
# of unexpected failures 169
# of unexpected successes 1
# of expected failures 119
# of unresolved testcases 45
# of unsupported tests 1514
It looks that 3 new kind of ICEs except the ICE in #c18 which
causes ~100 failures. ~50 failures are
internal compiler error: in assign_by_spills, at lra-assigns.c:1335
which may be similar with mips's PR61610. The typical example is
c-c++-common/torture/complex-sign-add.c -O2.
There are some unrecognizable insn errors for the rtl like
(insn 11 10 12 2 (set (reg/f:SI 166)
(mem/f/j:SI (plus:SI (subreg:SI (reg/v:DI 162 [ s1 ]) 0)
(const_int 4 [0x4])) [0 _5->m+0 S4 A32]))
It seems that the patch in #c11 should take account of subregs.
The example of another type of new failures is
gcc.c-torture/execute/20040703-1.c:127:1: error: could not split insn
(insn 118 112 119 (parallel [
(set (reg:SI 9 r9 [orig:253 D.1616 ] [253])
(xor:SI (zero_extend:SI (reg:QI 147 t))
(const_int 1 [0x1])))
(clobber (reg:SI 1 r1 [287]))
(clobber (reg:SI 147 t))
]) gcc.c-torture/execute/20040703-1.c:54 401 {*movrt_negc}
It looks that LRA substitutes
(zero_extend:SI (subreg:QI (reg:SI 147 t) 0))
with
(zero_extend:SI (reg:QI 147 t))
in this case.
