[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/CodeGen/Generic/pr2625.ll b/llvm/test/CodeGen/Generic/pr2625.ll
index 3e3dc4b..c745603 100644
--- a/llvm/test/CodeGen/Generic/pr2625.ll
+++ b/llvm/test/CodeGen/Generic/pr2625.ll
@@ -7,11 +7,11 @@
         store { i32, { i32 } }* %0, { i32, { i32 } }** %state
         %retval = alloca i32            ; <i32*> [#uses=2]
         store i32 0, i32* %retval
-        load { i32, { i32 } }** %state          ; <{ i32, { i32 } }*>:1 [#uses=1]
+        load { i32, { i32 } }*, { i32, { i32 } }** %state          ; <{ i32, { i32 } }*>:1 [#uses=1]
         store { i32, { i32 } } zeroinitializer, { i32, { i32 } }* %1
         br label %return
 
 return:         ; preds = %entry
-        load i32* %retval               ; <i32>:2 [#uses=1]
+        load i32, i32* %retval               ; <i32>:2 [#uses=1]
         ret i32 %2
 }