[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/MSP430/2009-08-25-DynamicStackAlloc.ll b/llvm/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
index e8c0d14..ca54ff0 100644
--- a/llvm/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
+++ b/llvm/test/CodeGen/MSP430/2009-08-25-DynamicStackAlloc.ll
@@ -7,7 +7,7 @@
 entry:
   %result = alloca i16, align 1                   ; <i16*> [#uses=2]
   store volatile i16 0, i16* %result
-  %tmp = load volatile i16* %result               ; <i16> [#uses=1]
+  %tmp = load volatile i16, i16* %result               ; <i16> [#uses=1]
   ret i16 %tmp
 }
 
@@ -23,7 +23,7 @@
 while.end:                                        ; preds = %while.cond
   %result.i = alloca i16, align 1                 ; <i16*> [#uses=2]
   store volatile i16 0, i16* %result.i
-  %tmp.i = load volatile i16* %result.i           ; <i16> [#uses=0]
+  %tmp.i = load volatile i16, i16* %result.i           ; <i16> [#uses=0]
   ret i16 0
 }