[UpdateTestChecks] Handle IR variables with a '-' in the name

[arichardson]

Summary

I noticed that clang will emit variables such as %indirect-arg-temp when
running update_cc1_test_checks.py and therefore update_cc1_test_checks.py
wasn't adding FileCheck captures for those variables.

[MaskRay]

It is named update_cc_test_checks.py. But do you think update_cc1_test_checks.py is a better name?

[arichardson]

In D44459#1037483, @MaskRay wrote:

It is named update_cc_test_checks.py. But do you think update_cc1_test_checks.py is a better name?

I've fixed the typo in my commit message. I think either name is fine (or even update_clang_test_checks.py).

llvm/trunk/utils/UpdateTestChecks/common.py

for prefix in prefixes:
       func_dict[prefix][func] = scrubbed_body
 
 ##### Generator of LLVM IR CHECK lines
 
 SCRUB_IR_COMMENT_RE = re.compile(r'\s*;.*')
 
 # Match things that look at identifiers, but only if they are followed by
 # spaces, commas, paren, or end of the string
-IR_VALUE_RE = re.compile(r'(\s+)%([\w\.]+?)([,\s\(\)]|\Z)')
+IR_VALUE_RE = re.compile(r'(\s+)%([\w\.\-]+?)([,\s\(\)]|\Z)')
 
 # Create a FileCheck variable name based on an IR name.
 def get_value_name(var):
   if var.isdigit():
     var = 'TMP' + var
   var = var.replace('.', '_')
+  var = var.replace('-', '_')
   return var.upper()
 
 
 # Create a FileCheck variable from regex.
 def get_value_definition(var):
   return '[[' + get_value_name(var) + ':%.*]]'