[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/double.ll b/llvm/test/CodeGen/Hexagon/double.ll
index c3b6f37..b4d025c 100644
--- a/llvm/test/CodeGen/Hexagon/double.ll
+++ b/llvm/test/CodeGen/Hexagon/double.ll
@@ -10,13 +10,13 @@
   store double* %acc, double** %acc.addr, align 4
   store double %num, double* %num.addr, align 8
   store double %num2, double* %num2.addr, align 8
-  %0 = load double** %acc.addr, align 4
-  %1 = load double* %0
-  %2 = load double* %num.addr, align 8
+  %0 = load double*, double** %acc.addr, align 4
+  %1 = load double, double* %0
+  %2 = load double, double* %num.addr, align 8
   %add = fadd double %1, %2
-  %3 = load double* %num2.addr, align 8
+  %3 = load double, double* %num2.addr, align 8
   %sub = fsub double %add, %3
-  %4 = load double** %acc.addr, align 4
+  %4 = load double*, double** %acc.addr, align 4
   store double %sub, double* %4
   ret void
 }