formatting and test coverage

Author: jyli0116

llvm/lib/Target/AArch64/AArch64Combine.td

@@ -351,9 +351,10 @@ def AArch64PostLegalizerLowering
 // Post-legalization combines which are primarily optimizations.
 def AArch64PostLegalizerCombiner
     : GICombiner<"AArch64PostLegalizerCombinerImpl",
-                       [copy_prop, cast_of_cast_combines, buildvector_of_truncate,
-                        integer_of_truncate, mutate_anyext_to_zext,
-                        combines_for_extload, combine_indexed_load_store, sext_trunc_sextload,
+                       [copy_prop, cast_of_cast_combines, 
+                        buildvector_of_truncate, integer_of_truncate,
+                        mutate_anyext_to_zext, combines_for_extload, 
+                        combine_indexed_load_store, sext_trunc_sextload,
                         hoist_logic_op_with_same_opcode_hands,
                         redundant_and, xor_of_and_with_same_reg,
                         extractvecelt_pairwise_add, redundant_or,
@@ -367,5 +368,6 @@ def AArch64PostLegalizerCombiner
                         select_to_minmax, or_to_bsp, combine_concat_vector,
                         commute_constant_to_rhs, extract_vec_elt_combines,
                         push_freeze_to_prevent_poison_from_propagating,
-                        combine_mul_cmlt, combine_use_vector_truncate, extmultomull, truncsat_combines]> {
+                        combine_mul_cmlt, combine_use_vector_truncate, 
+                        extmultomull, truncsat_combines]> {
 }