[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/Analysis/LazyCallGraph/basic.ll b/llvm/test/Analysis/LazyCallGraph/basic.ll
index b8108d9..d011602 100644
--- a/llvm/test/Analysis/LazyCallGraph/basic.ll
+++ b/llvm/test/Analysis/LazyCallGraph/basic.ll
@@ -118,10 +118,10 @@
 ; CHECK-NEXT: -> f1
 ; CHECK-NOT: ->
 
-  load i8** bitcast (void ()** @g to i8**)
-  load i8** bitcast (void ()** getelementptr ([4 x void ()*]* @g1, i32 0, i32 2) to i8**)
-  load i8** bitcast (void ()** getelementptr ({i8, void ()*, i8}* @g2, i32 0, i32 1) to i8**)
-  load i8** bitcast (void ()** @h to i8**)
+  load i8*, i8** bitcast (void ()** @g to i8**)
+  load i8*, i8** bitcast (void ()** getelementptr ([4 x void ()*]* @g1, i32 0, i32 2) to i8**)
+  load i8*, i8** bitcast (void ()** getelementptr ({i8, void ()*, i8}* @g2, i32 0, i32 1) to i8**)
+  load i8*, i8** bitcast (void ()** @h to i8**)
   ret void
 }