[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/2008-09-08-MultiplePred.ll b/llvm/test/Transforms/SimplifyCFG/2008-09-08-MultiplePred.ll
index ac9622d..6b216f5 100644
--- a/llvm/test/Transforms/SimplifyCFG/2008-09-08-MultiplePred.ll
+++ b/llvm/test/Transforms/SimplifyCFG/2008-09-08-MultiplePred.ll
@@ -4,7 +4,7 @@
 
 define i32 @func_127(i32 %p_129) nounwind {
 entry:
-	load i32* @g_103, align 4		; <i32>:0 [#uses=1]
+	load i32, i32* @g_103, align 4		; <i32>:0 [#uses=1]
 	icmp eq i32 %0, 0		; <i1>:1 [#uses=2]
 	br i1 %1, label %bb6.preheader, label %entry.return_crit_edge