[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/Transforms/SimplifyCFG/dbginfo.ll b/llvm/test/Transforms/SimplifyCFG/dbginfo.ll
index 1a9f20a..12aec91 100644
--- a/llvm/test/Transforms/SimplifyCFG/dbginfo.ll
+++ b/llvm/test/Transforms/SimplifyCFG/dbginfo.ll
@@ -58,7 +58,7 @@
 	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
 	call void @llvm.dbg.func.start({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram947 to { }*))
 	store %struct.__false_type* %this, %struct.__false_type** %this_addr
-	%0 = load %struct.__false_type** %this_addr, align 4		; <%struct.__false_type*> [#uses=1]
+	%0 = load %struct.__false_type*, %struct.__false_type** %this_addr, align 4		; <%struct.__false_type*> [#uses=1]
 	call void @_ZN9__gnu_cxx13new_allocatorIP5SceneED2Ev(%struct.__false_type* %0) nounwind
 	br label %bb