[UTC][NFC] Indent switch cases

Author: Camsyn

llvm/utils/UpdateTestChecks/common.py

@@ -606,6 +606,7 @@ def invoke_tool(exe, cmd_args, ir, preprocess_cmd=None, verbose=False):
 DEBUG_ONLY_ARG_RE = re.compile(r"-debug-only[= ]([^ ]+)")
 
 IS_DEBUG_RECORD_RE = re.compile(r"^(\s+)#dbg_")
+IS_SWITCH_CASE_RE = re.compile(r"^\s+i\d{1,2} \d+, label %\w+")
 
 SCRUB_LEADING_WHITESPACE_RE = re.compile(r"^(\s+)")
 SCRUB_WHITESPACE_RE = re.compile(r"(?!^(|  \w))[ \t]+", flags=re.M)

llvm/utils/update_test_checks.py

@@ -260,9 +260,14 @@ def update_test(ti: common.TestInfo):
                 skip_same_checks=dropped_previous_line,
             ):
                 # This input line of the function body will go as-is into the output.
-                # Except make leading whitespace uniform: 2 spaces. 4 for debug records.
+                # Except make leading whitespace uniform: 2 spaces. 4 for debug records/switch cases.
                 indent = (
-                    "  " if not common.IS_DEBUG_RECORD_RE.match(input_line) else "    "
+                    " " * 4
+                    if (
+                        common.IS_DEBUG_RECORD_RE.match(input_line)
+                        or common.IS_SWITCH_CASE_RE.match(input_line)
+                    )
+                    else " " * 2
                 )
                 input_line = common.SCRUB_LEADING_WHITESPACE_RE.sub(indent, input_line)
                 output_lines.append(input_line)