[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/PowerPC/unal-altivec.ll b/llvm/test/CodeGen/PowerPC/unal-altivec.ll
index 70c1f53..02f7ab4 100644
--- a/llvm/test/CodeGen/PowerPC/unal-altivec.ll
+++ b/llvm/test/CodeGen/PowerPC/unal-altivec.ll
@@ -10,11 +10,11 @@
   %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
   %0 = getelementptr inbounds float, float* %b, i64 %index
   %1 = bitcast float* %0 to <4 x float>*
-  %wide.load = load <4 x float>* %1, align 4
+  %wide.load = load <4 x float>, <4 x float>* %1, align 4
   %.sum11 = or i64 %index, 4
   %2 = getelementptr float, float* %b, i64 %.sum11
   %3 = bitcast float* %2 to <4 x float>*
-  %wide.load8 = load <4 x float>* %3, align 4
+  %wide.load8 = load <4 x float>, <4 x float>* %3, align 4
   %4 = fadd <4 x float> %wide.load, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
   %5 = fadd <4 x float> %wide.load8, <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
   %6 = getelementptr inbounds float, float* %a, i64 %index