https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84913
Bug ID: 84913
Summary: ICE vectorising chained conditional reduction
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: rsandifo at gcc dot gnu.org
Target Milestone: ---
This testcase:
function foo(a, b, c, n)
integer :: a(n), b(n), c(n), n, i, foo
foo = 0
do i = 1, n
if (a(i) .eq. b(i)) then
foo = 1
else if (a(i) .eq. c(i)) then
foo = 2
end if
end do
end function foo
triggers an ICE with call stack:
crash_signal
tree_check(tree_node*, char const*, int, char const*, tree_code)
vectorizable_reduction(gimple*, gimple_stmt_iterator*, gimple**, _slp_tree*,
_slp_instance*)
vect_analyze_stmt(gimple*, bool*, _slp_tree*, _slp_instance*)
vect_analyze_loop_operations
vect_analyze_loop_2
vect_analyze_loop(loop*, _loop_vec_info*)
vectorize_loops()
when compiled with -O3 -march=armv8-a+sve (aarch64) or -O3
-march=skylake-avx512 (x86_64).
