[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/X86/const-base-addr.ll b/llvm/test/CodeGen/X86/const-base-addr.ll
index 19a103c..4264713 100644
--- a/llvm/test/CodeGen/X86/const-base-addr.ll
+++ b/llvm/test/CodeGen/X86/const-base-addr.ll
@@ -12,11 +12,11 @@
 ; CHECK-NEXT:   addl  8(%rcx), %eax
 ; CHECK-NEXT:   addl  12(%rcx), %eax
   %addr1 = getelementptr %T, %T* inttoptr (i64 123456789012345678 to %T*), i32 0, i32 1
-  %tmp1 = load i32* %addr1
+  %tmp1 = load i32, i32* %addr1
   %addr2 = getelementptr %T, %T* inttoptr (i64 123456789012345678 to %T*), i32 0, i32 2
-  %tmp2 = load i32* %addr2
+  %tmp2 = load i32, i32* %addr2
   %addr3 = getelementptr %T, %T* inttoptr (i64 123456789012345678 to %T*), i32 0, i32 3
-  %tmp3 = load i32* %addr3
+  %tmp3 = load i32, i32* %addr3
   %tmp4 = add i32 %tmp1, %tmp2
   %tmp5 = add i32 %tmp3, %tmp4
   ret i32 %tmp5