[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/MSP430/2009-10-10-OrImpDef.ll b/llvm/test/CodeGen/MSP430/2009-10-10-OrImpDef.ll
index c1a186a..6dfbbfc 100644
--- a/llvm/test/CodeGen/MSP430/2009-10-10-OrImpDef.ll
+++ b/llvm/test/CodeGen/MSP430/2009-10-10-OrImpDef.ll
@@ -4,7 +4,7 @@
 entry:
 	%r = alloca i8		; <i8*> [#uses=2]
 	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
-	load volatile i8* %r, align 1		; <i8>:0 [#uses=1]
+	load volatile i8, i8* %r, align 1		; <i8>:0 [#uses=1]
 	or i8 %0, 1		; <i8>:1 [#uses=1]
 	store volatile i8 %1, i8* %r, align 1
 	br label %return