[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/PowerPC/dyn-alloca-aligned.ll b/llvm/test/CodeGen/PowerPC/dyn-alloca-aligned.ll
index e743997..98b0a17 100644
--- a/llvm/test/CodeGen/PowerPC/dyn-alloca-aligned.ll
+++ b/llvm/test/CodeGen/PowerPC/dyn-alloca-aligned.ll
@@ -12,10 +12,10 @@
   %vla = alloca i32, i64 %0, align 128
   %vla1 = alloca i32, i64 %0, align 128
   %a2 = getelementptr inbounds %struct.s, %struct.s* %a, i64 0, i32 0
-  %1 = load i32* %a2, align 4
+  %1 = load i32, i32* %a2, align 4
   store i32 %1, i32* %vla1, align 128
   %b = getelementptr inbounds %struct.s, %struct.s* %a, i64 0, i32 1
-  %2 = load i32* %b, align 4
+  %2 = load i32, i32* %b, align 4
   %arrayidx3 = getelementptr inbounds i32, i32* %vla1, i64 1
   store i32 %2, i32* %arrayidx3, align 4
   call void @bar(i32* %vla1, i32* %vla) #0