[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/ARM/2011-04-07-schediv.ll b/llvm/test/CodeGen/ARM/2011-04-07-schediv.ll
index 305d4cd..7f60315 100644
--- a/llvm/test/CodeGen/ARM/2011-04-07-schediv.ll
+++ b/llvm/test/CodeGen/ARM/2011-04-07-schediv.ll
@@ -21,7 +21,7 @@
   %uglygep = getelementptr i8, i8* %src_copy_start6, i32 %tmp
   %src_copy_start_addr.04 = bitcast i8* %uglygep to float*
   %dst_copy_start_addr.03 = getelementptr float, float* %dst_copy_start, i32 %j.05
-  %1 = load float* %src_copy_start_addr.04, align 4
+  %1 = load float, float* %src_copy_start_addr.04, align 4
   store float %1, float* %dst_copy_start_addr.03, align 4
   %2 = add i32 %j.05, 1
   %exitcond = icmp eq i32 %2, %src_width