[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/LoopSimplify/ashr-crash.ll b/llvm/test/Transforms/LoopSimplify/ashr-crash.ll
index c58903d..b5cc144 100644
--- a/llvm/test/Transforms/LoopSimplify/ashr-crash.ll
+++ b/llvm/test/Transforms/LoopSimplify/ashr-crash.ll
@@ -51,10 +51,10 @@
   br i1 %cmp2, label %for.body3, label %for.inc7
 
 for.body3:                                        ; preds = %for.cond1
-  %0 = load i32* @c, align 4
+  %0 = load i32, i32* @c, align 4
   %cmp4 = icmp sge i32 %storemerge1, %0
   %conv = zext i1 %cmp4 to i32
-  %1 = load i32* @d, align 4
+  %1 = load i32, i32* @d, align 4
   %add = add nsw i32 %conv, %1
   %sext = shl i32 %add, 16
   %conv6 = ashr exact i32 %sext, 16
@@ -63,7 +63,7 @@
   br label %for.cond1
 
 for.inc7:                                         ; preds = %for.cond1
-  %2 = load i32* @d, align 4
+  %2 = load i32, i32* @d, align 4
   %inc8 = add nsw i32 %2, 1
   br label %for.cond