[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/Hexagon/misaligned-access.ll b/llvm/test/CodeGen/Hexagon/misaligned-access.ll
index 4dafb44..f4b0cb9 100644
--- a/llvm/test/CodeGen/Hexagon/misaligned-access.ll
+++ b/llvm/test/CodeGen/Hexagon/misaligned-access.ll
@@ -7,10 +7,10 @@
 define i32 @CSDRSEARCH_executeSearchManager() #0 {
 entry:
   %temp = alloca i32, align 4
-  %0 = load i32* @temp1, align 4
+  %0 = load i32, i32* @temp1, align 4
   store i32 %0, i32* %temp, align 4
   %1 = bitcast i32* %temp to i64*
-  %2 = load i64* %1, align 8
+  %2 = load i64, i64* %1, align 8
   %call = call i32 @_hi(i64 %2)
   ret i32 %call
 }