[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/float.ll b/llvm/test/CodeGen/Hexagon/float.ll
index bec9f58..03d1fbf 100644
--- a/llvm/test/CodeGen/Hexagon/float.ll
+++ b/llvm/test/CodeGen/Hexagon/float.ll
@@ -10,13 +10,13 @@
   store float* %acc, float** %acc.addr, align 4
   store float %num, float* %num.addr, align 4
   store float %num2, float* %num2.addr, align 4
-  %0 = load float** %acc.addr, align 4
-  %1 = load float* %0
-  %2 = load float* %num.addr, align 4
+  %0 = load float*, float** %acc.addr, align 4
+  %1 = load float, float* %0
+  %2 = load float, float* %num.addr, align 4
   %add = fadd float %1, %2
-  %3 = load float* %num2.addr, align 4
+  %3 = load float, float* %num2.addr, align 4
   %sub = fsub float %add, %3
-  %4 = load float** %acc.addr, align 4
+  %4 = load float*, float** %acc.addr, align 4
   store float %sub, float* %4
   ret void
 }