[Test] Underscored dump_function.

Use underscores rather than hyphens so that text editors understand the
name as a single word.

Author: nate-chandler

lib/SILOptimizer/UtilityPasses/TestRunner.cpp

@@ -114,7 +114,7 @@ void TestRunner::run() {
 // Arguments: NONE
 // Dumps:
 // - the function
-static FunctionTest DumpFunctionTest("dump-function",
+static FunctionTest DumpFunctionTest("dump_function",
                                      [](auto &function, auto &, auto &) {
                                        function.print(llvm::outs());
                                      });

test/SILOptimizer/deinit_barrier.sil

@@ -38,13 +38,13 @@ sil [ossa] @empty_fn_caller_caller : $@convention(thin) () -> () {
 }
 
 
-// CHECK-LABEL: begin running test 1 of {{[0-9]+}} on call_functions: dump-function
+// CHECK-LABEL: begin running test 1 of {{[0-9]+}} on call_functions: dump_function
 // CHECK:       [[EMPTY_FN:%[^,]+]] = function_ref @empty_fn
 // CHECK:       [[EMPTY_FN_CALLER:%[^,]+]] = function_ref @empty_fn_caller
 // CHECK:       [[EMPTY_FN_CALLER_CALLER:%[^,]+]] = function_ref @empty_fn_caller_caller
 // CHECK:       [[UNKNOWN:%[^,]+]] = function_ref @unknown
 // CHECK:       [[UNKNOWN_CALLER:%[^,]+]] = function_ref @unknown_caller
-// CHECK-LABEL: end running test 1 of {{[0-9]+}} on call_functions: dump-function
+// CHECK-LABEL: end running test 1 of {{[0-9]+}} on call_functions: dump_function
 // CHECK-LABEL: begin running test 2 of {{[0-9]+}} on call_functions: is_deinit_barrier
 // CHECK:   apply [[EMPTY_FN]]
 // CHECK:   false
@@ -67,7 +67,7 @@ sil [ossa] @empty_fn_caller_caller : $@convention(thin) () -> () {
 // CHECK-LABEL: end running test 6 of {{[0-9]+}} on call_functions: is_deinit_barrier
 sil [ossa] @call_functions : $@convention(thin) () -> () {
 entry:
-  specify_test "dump-function"
+  specify_test "dump_function"
   specify_test "is_deinit_barrier @instruction[1]"
   %empty_fn = function_ref @empty_fn : $@convention(thin) () -> ()
   apply %empty_fn() : $@convention(thin) () -> ()

test/SILOptimizer/pruned_liveness_boundary.sil

@@ -1,15 +1,15 @@
 // RUN: %target-sil-opt -test-runner %s 2>&1 | %FileCheck %s
 
-// CHECK: begin running test 1 of {{[^,]+}} on last_uses_merge_points: dump-function
+// CHECK: begin running test 1 of {{[^,]+}} on last_uses_merge_points: dump_function
 // CHECK: [[REGISTER_3:%[^,]+]] = tuple ()
 // CHECK: return [[REGISTER_3]]
-// CHECK: end running test 1 of {{[^,]+}} on last_uses_merge_points: dump-function
+// CHECK: end running test 1 of {{[^,]+}} on last_uses_merge_points: dump_function
 // CHECK: begin running test 2 of {{[^,]+}} on last_uses_merge_points: pruned_liveness_boundary_with_list_of_last_users_insertion_points
 // CHECK: [[REGISTER_3]] = tuple ()
 // CHECK: end running test 2 of {{[^,]+}} on last_uses_merge_points: pruned_liveness_boundary_with_list_of_last_users_insertion_points
 sil [ossa] @last_uses_merge_points : $@convention(thin) () -> () {
 entry:
-  specify_test "dump-function"
+  specify_test "dump_function"
   specify_test "pruned_liveness_boundary_with_list_of_last_users_insertion_points @block[1].instruction[0] @block[2].instruction[0]"
   cond_br undef, left, right
 left: