[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/R600/fcmp-cnd.ll b/llvm/test/CodeGen/R600/fcmp-cnd.ll
index 1d4e323..530274f 100644
--- a/llvm/test/CodeGen/R600/fcmp-cnd.ll
+++ b/llvm/test/CodeGen/R600/fcmp-cnd.ll
@@ -6,7 +6,7 @@
 
 define void @test(i32 addrspace(1)* %out, float addrspace(1)* %in) {
 entry:
-  %0 = load float addrspace(1)* %in
+  %0 = load float, float addrspace(1)* %in
   %cmp = fcmp oeq float %0, 0.000000e+00
   %value = select i1 %cmp, i32 2, i32 3 
   store i32 %value, i32 addrspace(1)* %out