http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60502
Bug ID: 60502
Summary: 4.9 ICE reassociation and vector types.
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: graham.stott at btinternet dot com
gcc_unreacble abort in reassociation and vector types
If reassocation manages to simplify an expression which involves any VECTOR
type
it will trigger a gcc_unreachable abort.
On any target which has support for vector types.
------------------------------------------------------------
typedef signed char v16i8 __attribute__ ((vector_size(16)));
v16i8 bug1(v16i8 op0)
{
v16i8 m1 = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
return (op0 ^ m1) | (op0 & m1);
}
------------------------------------------------------------
It hits a gcc_unreachable() in build_int_cst_wide.
bug.c:3:7: internal compiler error: in build_int_cst_wide, at tree.c:1200
v16i8 bug1(v16i8 op0)
^
0xb75583 build_int_cst_wide(tree_node*, unsigned long, long)
/gcc/gcc/gcc/tree.c:1200
0xaade63 eliminate_not_pairs
/gcc/gcc/gcc/tree-ssa-reassoc.c:810
0xaade63 optimize_ops_list
/gcc/gcc/gcc/tree-ssa-reassoc.c:1744
0xab0a99 reassociate_bb
/gcc/gcc/gcc/tree-ssa-reassoc.c:4436
0xab08a7 reassociate_bb
/gcc/gcc/gcc/tree-ssa-reassoc.c:4519
0xab311b do_reassoc
/gcc/gcc/gcc/tree-ssa-reassoc.c:4552
0xab311b execute_reassoc
/gcc/gcc/gcc/tree-ssa-reassoc.c:4634
0xab311b execute
/gcc/gcc/gcc/tree-ssa-reassoc.c:4676
