[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/ARM/2009-09-23-LiveVariablesBug.ll b/llvm/test/CodeGen/ARM/2009-09-23-LiveVariablesBug.ll
index 2ff479b..4bbd047 100644
--- a/llvm/test/CodeGen/ARM/2009-09-23-LiveVariablesBug.ll
+++ b/llvm/test/CodeGen/ARM/2009-09-23-LiveVariablesBug.ll
@@ -9,7 +9,7 @@
 entry:
   %0 = call arm_aapcs_vfpcc  %struct.4* @sss1(%struct.4* undef, float 0.000000e+00) nounwind ; <%struct.4*> [#uses=0]
   %1 = call arm_aapcs_vfpcc  %struct.4* @qqq1(%struct.4* null, float 5.000000e-01) nounwind ; <%struct.4*> [#uses=0]
-  %val92 = load <4 x float>* null                 ; <<4 x float>> [#uses=1]
+  %val92 = load <4 x float>, <4 x float>* null                 ; <<4 x float>> [#uses=1]
   %2 = call arm_aapcs_vfpcc  %struct.4* @zzz2(%struct.4* undef, <4 x float> %val92) nounwind ; <%struct.4*> [#uses=0]
   ret %struct.1* %this
 }