[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/BlockFrequencyInfo/basic.ll b/llvm/test/Analysis/BlockFrequencyInfo/basic.ll
index 8701bbd..728adf0 100644
--- a/llvm/test/Analysis/BlockFrequencyInfo/basic.ll
+++ b/llvm/test/Analysis/BlockFrequencyInfo/basic.ll
@@ -13,7 +13,7 @@
   %iv = phi i32 [ 0, %entry ], [ %next, %body ]
   %base = phi i32 [ 0, %entry ], [ %sum, %body ]
   %arrayidx = getelementptr inbounds i32, i32* %a, i32 %iv
-  %0 = load i32* %arrayidx
+  %0 = load i32, i32* %arrayidx
   %sum = add nsw i32 %0, %base
   %next = add i32 %iv, 1
   %exitcond = icmp eq i32 %next, %i