On sh4-*-linux-gnu, gcc.c-torture/compile/20011109-1.c with -O1
starts to fail:
testsuite/gcc.c-torture/compile/20011109-1.c:51: error: unrecognizable insn:
(insn 26 25 232 4 (parallel [
(set (reg:SI 248)
(gt:SI (reg:DF 246)
(reg:DF 247)))
(use (reg/v:PSI 151 ))
]) -1 (insn_list:REG_DEP_TRUE 24 (insn_list:REG_DEP_TRUE 25 (nil)))
(nil))
after -fmove-loop-invariants is enabled by default.
SH backend defines set insns whose destinations are the hard reg
like T_REG and R0_REG. It seems that move_loop_invariants makes
such pattern into
(set pseudo_reg_A ...) + (set hard_reg pseudo_reg_A)
and then the former insn fails to be recognized.
--
Summary: FAIL: gcc.c-torture/compile/20011109-1.c,-O1
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: kkojima at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: sh4-*-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26254
