[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

Essentially the same as the GEP change in r230786.

A similar migration script can be used to update test cases, though a few more
test case improvements/changes were required this time around: (r229269-r229278)

import fileinput
import sys
import re

pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)")

for line in sys.stdin:
  sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line))

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7649

llvm-svn: 230794
diff --git a/llvm/test/Transforms/Mem2Reg/crash.ll b/llvm/test/Transforms/Mem2Reg/crash.ll
index 59e2c0b..a4a31b1 100644
--- a/llvm/test/Transforms/Mem2Reg/crash.ll
+++ b/llvm/test/Transforms/Mem2Reg/crash.ll
@@ -14,7 +14,7 @@
   br label %bb15
 
 bb15:
-  %B = load i32* %whichFlag
+  %B = load i32, i32* %whichFlag
   ret i32 %B
 
 lpad86:
@@ -33,11 +33,11 @@
   br label %bb15
 
 bb15:
-  %B = load i32* %whichFlag
+  %B = load i32, i32* %whichFlag
   ret i32 %B
 
 invcont2:
-  %C = load i32* %whichFlag
+  %C = load i32, i32* %whichFlag
   store i32 %C, i32* %whichFlag
   br label %bb15
 }