[Bug target/104952] [nvptx][OpenMP] wrong code with OR / AND reduction ('reduction(||:' and '&&') with SIMT

[vries at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104952

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Hmm, that seems to be actually due to:
...
                      if (sctx.is_simt)
                        {
                          if (!simt_lane)
                            simt_lane = create_tmp_var (unsigned_type_node);
                          x = build_call_expr_internal_loc
                            (UNKNOWN_LOCATION, IFN_GOMP_SIMT_XCHG_BFLY,
                             TREE_TYPE (ivar), 2, ivar, simt_lane);
                          x = build2 (code, TREE_TYPE (ivar), ivar, x);
                          gimplify_assign (ivar, x, &llist[2]);
                        }
...
which gimplifies assigning:
...
(gdb) call debug_generic_expr (x)
D.2163 || .GOMP_SIMT_XCHG_BFLY (D.2163, D.2164)
...
to:
...
(gdb) call debug_generic_expr (ivar)
D.2163
...