[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/hwloop-cleanup.ll b/llvm/test/CodeGen/Hexagon/hwloop-cleanup.ll
index 8112407..643fe11 100644
--- a/llvm/test/CodeGen/Hexagon/hwloop-cleanup.ll
+++ b/llvm/test/CodeGen/Hexagon/hwloop-cleanup.ll
@@ -20,7 +20,7 @@
   %sum.03 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
   %arrayidx.phi = phi i32* [ %arrayidx.inc, %for.body ], [ %b, %for.body.preheader ]
   %i.02 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
-  %0 = load i32* %arrayidx.phi, align 4
+  %0 = load i32, i32* %arrayidx.phi, align 4
   %add = add nsw i32 %0, %sum.03
   %inc = add nsw i32 %i.02, 1
   %exitcond = icmp eq i32 %inc, %n
@@ -50,7 +50,7 @@
   %sum.02 = phi i32 [ 0, %entry ], [ %add, %for.body ]
   %arrayidx.phi = phi i32* [ %b, %entry ], [ %arrayidx.inc, %for.body ]
   %i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %0 = load i32* %arrayidx.phi, align 4
+  %0 = load i32, i32* %arrayidx.phi, align 4
   %add = add nsw i32 %0, %sum.02
   %inc = add nsw i32 %i.01, 1
   %exitcond = icmp eq i32 %inc, 40