[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/SystemZ/frame-09.ll b/llvm/test/CodeGen/SystemZ/frame-09.ll
index a7cb6bd..ead944e 100644
--- a/llvm/test/CodeGen/SystemZ/frame-09.ll
+++ b/llvm/test/CodeGen/SystemZ/frame-09.ll
@@ -64,19 +64,19 @@
 ; CHECK: st {{.*}}, 4(%r2)
 ; CHECK: lmg %r6, %r15, 48(%r11)
 ; CHECK: br %r14
-  %l0 = load volatile i32 *%ptr
-  %l1 = load volatile i32 *%ptr
-  %l3 = load volatile i32 *%ptr
-  %l4 = load volatile i32 *%ptr
-  %l5 = load volatile i32 *%ptr
-  %l6 = load volatile i32 *%ptr
-  %l7 = load volatile i32 *%ptr
-  %l8 = load volatile i32 *%ptr
-  %l9 = load volatile i32 *%ptr
-  %l10 = load volatile i32 *%ptr
-  %l12 = load volatile i32 *%ptr
-  %l13 = load volatile i32 *%ptr
-  %l14 = load volatile i32 *%ptr
+  %l0 = load volatile i32 , i32 *%ptr
+  %l1 = load volatile i32 , i32 *%ptr
+  %l3 = load volatile i32 , i32 *%ptr
+  %l4 = load volatile i32 , i32 *%ptr
+  %l5 = load volatile i32 , i32 *%ptr
+  %l6 = load volatile i32 , i32 *%ptr
+  %l7 = load volatile i32 , i32 *%ptr
+  %l8 = load volatile i32 , i32 *%ptr
+  %l9 = load volatile i32 , i32 *%ptr
+  %l10 = load volatile i32 , i32 *%ptr
+  %l12 = load volatile i32 , i32 *%ptr
+  %l13 = load volatile i32 , i32 *%ptr
+  %l14 = load volatile i32 , i32 *%ptr
   %add0 = add i32 %l0, %l0
   %add1 = add i32 %l1, %add0
   %add3 = add i32 %l3, %add1