[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/Transforms/InstSimplify/compare.ll b/llvm/test/Transforms/InstSimplify/compare.ll
index cbc0125..376f6ea 100644
--- a/llvm/test/Transforms/InstSimplify/compare.ll
+++ b/llvm/test/Transforms/InstSimplify/compare.ll
@@ -950,7 +950,7 @@
 }
 
 define i1 @nonnull_load(i32** %addr) {
-  %ptr = load i32** %addr, !nonnull !{}
+  %ptr = load i32*, i32** %addr, !nonnull !{}
   %cmp = icmp eq i32* %ptr, null
   ret i1 %cmp
 ; CHECK-LABEL: @nonnull_load
@@ -958,14 +958,14 @@
 }
 
 define i1 @nonnull_load_as_outer(i32* addrspace(1)* %addr) {
-  %ptr = load i32* addrspace(1)* %addr, !nonnull !{}
+  %ptr = load i32*, i32* addrspace(1)* %addr, !nonnull !{}
   %cmp = icmp eq i32* %ptr, null
   ret i1 %cmp
 ; CHECK-LABEL: @nonnull_load_as_outer
 ; CHECK: ret i1 false
 }
 define i1 @nonnull_load_as_inner(i32 addrspace(1)** %addr) {
-  %ptr = load i32 addrspace(1)** %addr, !nonnull !{}
+  %ptr = load i32 addrspace(1)*, i32 addrspace(1)** %addr, !nonnull !{}
   %cmp = icmp eq i32 addrspace(1)* %ptr, null
   ret i1 %cmp
 ; CHECK-LABEL: @nonnull_load_as_inner