[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/Assembler/2010-02-05-FunctionLocalMetadataBecomesNull.ll b/llvm/test/Assembler/2010-02-05-FunctionLocalMetadataBecomesNull.ll
index 50ad32e..c8898fc 100644
--- a/llvm/test/Assembler/2010-02-05-FunctionLocalMetadataBecomesNull.ll
+++ b/llvm/test/Assembler/2010-02-05-FunctionLocalMetadataBecomesNull.ll
@@ -15,7 +15,7 @@
 ; CHECK: call void @llvm.dbg.value(metadata i64 72,
   call void @llvm.dbg.declare(metadata i64* %diff1, metadata !0, metadata !{!"0x102"})
   store i64 72, i64* %diff1, align 8
-  %v1 = load %struct.test** @TestArrayPtr, align 8 ; <%struct.test*> [#uses=1]
+  %v1 = load %struct.test*, %struct.test** @TestArrayPtr, align 8 ; <%struct.test*> [#uses=1]
   %v2 = ptrtoint %struct.test* %v1 to i64 ; <i64> [#uses=1]
   %v3 = sub i64 %v2, ptrtoint ([10 x %struct.test]* @TestArray to i64) ; <i64> [#uses=1]
   store i64 %v3, i64* %diff1, align 8