[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/R600/array-ptr-calc-i64.ll b/llvm/test/CodeGen/R600/array-ptr-calc-i64.ll
index f3db9d7..eae095e 100644
--- a/llvm/test/CodeGen/R600/array-ptr-calc-i64.ll
+++ b/llvm/test/CodeGen/R600/array-ptr-calc-i64.ll
@@ -9,8 +9,8 @@
   %tid = call i32 @llvm.SI.tid() readnone
   %a_ptr = getelementptr [1025 x i32], [1025 x i32] addrspace(1)* %inA, i32 %tid, i32 0
   %b_ptr = getelementptr i32, i32 addrspace(1)* %inB, i32 %tid
-  %a = load i32 addrspace(1)* %a_ptr
-  %b = load i32 addrspace(1)* %b_ptr
+  %a = load i32, i32 addrspace(1)* %a_ptr
+  %b = load i32, i32 addrspace(1)* %b_ptr
   %result = add i32 %a, %b
   store i32 %result, i32 addrspace(1)* %out
   ret void