[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/PowerPC/2007-09-07-LoadStoreIdxForms.ll b/llvm/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll
index 40f46fd..ee1e233 100644
--- a/llvm/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll
+++ b/llvm/test/CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll
@@ -8,7 +8,7 @@
 entry:
         %ttype = alloca i32, align 4            ; <i32*> [#uses=1]
         %regs = alloca [1024 x %struct.__db_region], align 16           ; <[1024 x %struct.__db_region]*> [#uses=0]
-        %tmp = load i32* %ttype, align 4                ; <i32> [#uses=1]
+        %tmp = load i32, i32* %ttype, align 4                ; <i32> [#uses=1]
         %tmp1 = call i32 (...)* @bork( i32 %tmp )               ; <i32> [#uses=0]
         ret void