[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/ExecutionEngine/MCJIT/2002-12-16-ArgTest.ll b/llvm/test/ExecutionEngine/MCJIT/2002-12-16-ArgTest.ll
index 8a71f59..52b04a0 100644
--- a/llvm/test/ExecutionEngine/MCJIT/2002-12-16-ArgTest.ll
+++ b/llvm/test/ExecutionEngine/MCJIT/2002-12-16-ArgTest.ll
@@ -24,9 +24,9 @@
 	%add1-indvar = add i32 %cann-indvar, 1		; <i32> [#uses=2]
 	%cann-indvar-idxcast = sext i32 %cann-indvar to i64		; <i64> [#uses=1]
 	%CT = bitcast i8** %local to i8***		; <i8***> [#uses=1]
-	%reg115 = load i8*** %CT		; <i8**> [#uses=1]
+	%reg115 = load i8**, i8*** %CT		; <i8**> [#uses=1]
 	%cast235 = getelementptr i8*, i8** %reg115, i64 %cann-indvar-idxcast		; <i8**> [#uses=1]
-	%reg117 = load i8** %cast235		; <i8*> [#uses=1]
+	%reg117 = load i8*, i8** %cast235		; <i8*> [#uses=1]
 	%reg236 = call i32 @puts( i8* %reg117 )		; <i32> [#uses=0]
 	%cond239 = icmp slt i32 %add1-indvar, %argc		; <i1> [#uses=1]
 	br i1 %cond239, label %bb2, label %bb3