[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/minsize-litpools.ll b/llvm/test/CodeGen/ARM/minsize-litpools.ll
index d5cd2a9..d5452ed 100644
--- a/llvm/test/CodeGen/ARM/minsize-litpools.ll
+++ b/llvm/test/CodeGen/ARM/minsize-litpools.ll
@@ -12,7 +12,7 @@
 ; CHECK: ldr r[[GLOBDEST:[0-9]+]], {{.?LCPI0_0}}
 ; CHECK: ldr r0, [r[[GLOBDEST]]]
 
-  %val = load i32* @var
+  %val = load i32, i32* @var
   ret i32 %val
 }
 
@@ -21,6 +21,6 @@
 ; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var
 ; CHECK: movt [[GLOBDEST]], :upper16:var
 
-  %val = load i32* @var
+  %val = load i32, i32* @var
   ret i32 %val
 }