[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/AArch64/arm64-alloca-frame-pointer-offset.ll b/llvm/test/CodeGen/AArch64/arm64-alloca-frame-pointer-offset.ll
index 3750f31b..eb0cd35 100644
--- a/llvm/test/CodeGen/AArch64/arm64-alloca-frame-pointer-offset.ll
+++ b/llvm/test/CodeGen/AArch64/arm64-alloca-frame-pointer-offset.ll
@@ -13,17 +13,17 @@
   %arr2 = alloca [32 x i32], align 4
   %j = alloca i32, align 4
   store i32 %a, i32* %a.addr, align 4
-  %tmp = load i32* %a.addr, align 4
+  %tmp = load i32, i32* %a.addr, align 4
   %tmp1 = zext i32 %tmp to i64
   %v = mul i64 4, %tmp1
   %vla = alloca i8, i64 %v, align 4
   %tmp2 = bitcast i8* %vla to i32*
-  %tmp3 = load i32* %a.addr, align 4
+  %tmp3 = load i32, i32* %a.addr, align 4
   store i32 %tmp3, i32* %i, align 4
-  %tmp4 = load i32* %a.addr, align 4
+  %tmp4 = load i32, i32* %a.addr, align 4
   store i32 %tmp4, i32* %j, align 4
-  %tmp5 = load i32* %j, align 4
+  %tmp5 = load i32, i32* %j, align 4
   store i32 %tmp5, i32* %retval
-  %x = load i32* %retval
+  %x = load i32, i32* %retval
   ret i32 %x
 }