[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/ctrloops.ll b/llvm/test/CodeGen/PowerPC/ctrloops.ll
index ccab7cb..fff9e20 100644
--- a/llvm/test/CodeGen/PowerPC/ctrloops.ll
+++ b/llvm/test/CodeGen/PowerPC/ctrloops.ll
@@ -10,7 +10,7 @@
 
 for.body:                                         ; preds = %for.body, %entry
   %i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
-  %0 = load volatile i32* @a, align 4
+  %0 = load volatile i32, i32* @a, align 4
   %add = add nsw i32 %0, %c
   store volatile i32 %add, i32* @a, align 4
   %inc = add nsw i32 %i.01, 1
@@ -34,7 +34,7 @@
 
 for.body:                                         ; preds = %entry, %for.body
   %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
-  %0 = load volatile i32* @a, align 4
+  %0 = load volatile i32, i32* @a, align 4
   %add = add nsw i32 %0, %c
   store volatile i32 %add, i32* @a, align 4
   %inc = add nsw i32 %i.02, 1
@@ -58,7 +58,7 @@
 for.body:                                         ; preds = %entry, %for.body
   %i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
   %mul = mul nsw i32 %i.02, %c
-  %0 = load volatile i32* @a, align 4
+  %0 = load volatile i32, i32* @a, align 4
   %add = add nsw i32 %0, %mul
   store volatile i32 %add, i32* @a, align 4
   %inc = add nsw i32 %i.02, 1