[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/Transforms/LoopVectorize/if-conversion-nest.ll b/llvm/test/Transforms/LoopVectorize/if-conversion-nest.ll
index 4a327e8..3a581eb 100644
--- a/llvm/test/Transforms/LoopVectorize/if-conversion-nest.ll
+++ b/llvm/test/Transforms/LoopVectorize/if-conversion-nest.ll
@@ -20,9 +20,9 @@
 for.body:
   %indvars.iv = phi i64 [ %indvars.iv.next, %if.end14 ], [ 0, %entry ]
   %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
-  %0 = load i32* %arrayidx, align 4
+  %0 = load i32, i32* %arrayidx, align 4
   %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv
-  %1 = load i32* %arrayidx2, align 4
+  %1 = load i32, i32* %arrayidx2, align 4
   %cmp3 = icmp sgt i32 %0, %1
   br i1 %cmp3, label %if.then, label %if.end14