[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/fast-isel-pic.ll b/llvm/test/CodeGen/ARM/fast-isel-pic.ll
index fdbdf03..70e15da 100644
--- a/llvm/test/CodeGen/ARM/fast-isel-pic.ll
+++ b/llvm/test/CodeGen/ARM/fast-isel-pic.ll
@@ -29,7 +29,7 @@
 ; ARMv7-ELF-NEXT: add r[[reg2]], pc
 ; ARMv7-ELF: ldr r[[reg3:[0-9]+]],
 ; ARMv7-ELF: ldr r[[reg2]], [r[[reg3]], r[[reg2]]]
-  %tmp = load i32* @g
+  %tmp = load i32, i32* @g
   ret i32 %tmp
 }
 
@@ -60,6 +60,6 @@
 ; ARMv7-ELF-NEXT: add r[[reg5]], pc
 ; ARMv7-ELF: ldr r[[reg6:[0-9]+]],
 ; ARMv7-ELF: ldr r[[reg5]], [r[[reg6]], r[[reg5]]]
-  %tmp = load i32* @i
+  %tmp = load i32, i32* @i
   ret i32 %tmp
 }