[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/2008-02-04-LocalRegAllocBug.ll b/llvm/test/CodeGen/ARM/2008-02-04-LocalRegAllocBug.ll
index 3754db0..9894105 100644
--- a/llvm/test/CodeGen/ARM/2008-02-04-LocalRegAllocBug.ll
+++ b/llvm/test/CodeGen/ARM/2008-02-04-LocalRegAllocBug.ll
@@ -10,7 +10,7 @@
 define i32 @vorbis_staticbook_pack(%struct.static_codebook* %c, %struct.oggpack_buffer* %opb) {
 entry:
 	%opb_addr = alloca %struct.oggpack_buffer*		; <%struct.oggpack_buffer**> [#uses=1]
-	%tmp1 = load %struct.oggpack_buffer** %opb_addr, align 4		; <%struct.oggpack_buffer*> [#uses=1]
+	%tmp1 = load %struct.oggpack_buffer*, %struct.oggpack_buffer** %opb_addr, align 4		; <%struct.oggpack_buffer*> [#uses=1]
 	call void @oggpack_write( %struct.oggpack_buffer* %tmp1, i32 5653314, i32 24 ) nounwind 
 	call void @oggpack_write( %struct.oggpack_buffer* null, i32 0, i32 24 ) nounwind 
 	unreachable