[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/addsub_ext.ll b/llvm/test/CodeGen/AArch64/addsub_ext.ll
index ceea8a0..f0c7572 100644
--- a/llvm/test/CodeGen/AArch64/addsub_ext.ll
+++ b/llvm/test/CodeGen/AArch64/addsub_ext.ll
@@ -7,9 +7,9 @@
 
 define void @addsub_i8rhs() minsize {
 ; CHECK-LABEL: addsub_i8rhs:
-    %val8_tmp = load i8* @var8
-    %lhs32 = load i32* @var32
-    %lhs64 = load i64* @var64
+    %val8_tmp = load i8, i8* @var8
+    %lhs32 = load i32, i32* @var32
+    %lhs64 = load i64, i64* @var64
 
     ; Need this to prevent extension upon load and give a vanilla i8 operand.
     %val8 = add i8 %val8_tmp, 123
@@ -82,9 +82,9 @@
 
 define void @addsub_i16rhs() minsize {
 ; CHECK-LABEL: addsub_i16rhs:
-    %val16_tmp = load i16* @var16
-    %lhs32 = load i32* @var32
-    %lhs64 = load i64* @var64
+    %val16_tmp = load i16, i16* @var16
+    %lhs32 = load i32, i32* @var32
+    %lhs64 = load i64, i64* @var64
 
     ; Need this to prevent extension upon load and give a vanilla i16 operand.
     %val16 = add i16 %val16_tmp, 123
@@ -160,8 +160,8 @@
 ; in the face of "add/sub (shifted register)" so I don't intend to.
 define void @addsub_i32rhs() minsize {
 ; CHECK-LABEL: addsub_i32rhs:
-    %val32_tmp = load i32* @var32
-    %lhs64 = load i64* @var64
+    %val32_tmp = load i32, i32* @var32
+    %lhs64 = load i64, i64* @var64
 
     %val32 = add i32 %val32_tmp, 123