http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48160
Summary: prepare_call_arguments failed to handle subreg
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hjl.to...@gmail.com
CC: ja...@redhat.com
prepare_call_arguments failed to handle
(call_insn:TI 17 12 21 2 (set (reg:SI 0 ax)
(call (mem:QI (symbol_ref:DI
("_ZN9__gnu_cxx17__pool_alloc_base17_M_allocate_chunkEmRi") [flags 0x3]
<function_decl 0x7ffff0ac4500 _M_allocate_chunk>) [0 _M_allocate_chunk S1 A8])
(const_int 0 [0])))
/export/gnu/import/git/gcc-x32/libstdc++-v3/src/pool_allocator.cc:136 935
{*call_value_0_rex64}
(expr_list:REG_DEAD (reg:SI 5 di)
(expr_list:REG_DEAD (reg:SI 4 si)
(expr_list:REG_DEAD (reg:SI 1 dx)
(nil))))
(expr_list:REG_DEP_TRUE (use (reg:SI 5 di))
(expr_list:REG_DEP_TRUE (use (reg:SI 4 si))
(expr_list:REG_DEP_TRUE (use (reg:SI 1 dx))
(nil)))))
(gdb)
which leads to
(gdb) call debug_rtx (item)
(concat:SI (reg:SI 1 dx)
(subreg:SI (value/u:DI 10:3917 @0x1c537e8/0x1c6de40) 0))
