[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/Transforms/LoopRotate/multiple-exits.ll b/llvm/test/Transforms/LoopRotate/multiple-exits.ll
index e97d3df..f31ed7f 100644
--- a/llvm/test/Transforms/LoopRotate/multiple-exits.ll
+++ b/llvm/test/Transforms/LoopRotate/multiple-exits.ll
@@ -22,7 +22,7 @@
 land.rhs:                                         ; preds = %for.cond1
   %conv = zext i32 %i.1 to i64
   %arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* %a, i64 0, i64 %conv
-  %0 = load i32* %arrayidx, align 4
+  %0 = load i32, i32* %arrayidx, align 4
   %add = add i32 %0, %sum.1
   %cmp4 = icmp ugt i32 %add, 1000
   %inc = add i32 %i.1, 1