[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/a15-partial-update.ll b/llvm/test/CodeGen/ARM/a15-partial-update.ll
index 71b95ee..576eb7a 100644
--- a/llvm/test/CodeGen/ARM/a15-partial-update.ll
+++ b/llvm/test/CodeGen/ARM/a15-partial-update.ll
@@ -10,7 +10,7 @@
 ; generated.
 
 ; CHECK-NOT: vmov.{{.*}} d{{[0-9]+}},
-  %tmp2 = load float* %A, align 4
+  %tmp2 = load float, float* %A, align 4
   %tmp3 = insertelement <2 x float> %B, float %tmp2, i32 1
   ret <2 x float> %tmp3
 }
@@ -29,7 +29,7 @@
   %newcount = add i32 %oldcount, 1
   %p1 = getelementptr <4 x i8>, <4 x i8> *%in, i32 %newcount
   %p2 = getelementptr <4 x i8>, <4 x i8> *%out, i32 %newcount
-  %tmp1 = load <4 x i8> *%p1, align 4
+  %tmp1 = load <4 x i8> , <4 x i8> *%p1, align 4
   store <4 x i8> %tmp1, <4 x i8> *%p2
   %cmp = icmp eq i32 %newcount, %n
   br i1 %cmp, label %loop, label %ret