[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/Mips/internalfunc.ll b/llvm/test/CodeGen/Mips/internalfunc.ll
index 863375a..0320e28 100644
--- a/llvm/test/CodeGen/Mips/internalfunc.ll
+++ b/llvm/test/CodeGen/Mips/internalfunc.ll
@@ -20,7 +20,7 @@
   br i1 %tobool, label %if.end, label %if.then
 
 if.then:                                          ; preds = %entry
-  %tmp1 = load void (...)** @caller.sf1, align 4
+  %tmp1 = load void (...)*, void (...)** @caller.sf1, align 4
   tail call void (...)* %tmp1() nounwind
   br label %if.end
 
@@ -30,7 +30,7 @@
 ; CHECK: lw  $[[R3:[0-9]+]], %got(caller.sf1)
 ; CHECK: sw  ${{[0-9]+}}, %lo(caller.sf1)($[[R3]])
   %tobool3 = icmp ne i32 %a0, 0
-  %tmp4 = load void (...)** @gf1, align 4
+  %tmp4 = load void (...)*, void (...)** @gf1, align 4
   %cond = select i1 %tobool3, void (...)* %tmp4, void (...)* bitcast (void ()* @sf2 to void (...)*)
   store void (...)* %cond, void (...)** @caller.sf1, align 4
   ret void