[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/LoopVectorize/multiple-address-spaces.ll b/llvm/test/Transforms/LoopVectorize/multiple-address-spaces.ll
index 1659af6..e79c931 100644
--- a/llvm/test/Transforms/LoopVectorize/multiple-address-spaces.ll
+++ b/llvm/test/Transforms/LoopVectorize/multiple-address-spaces.ll
@@ -28,7 +28,7 @@
 for.body:                                         ; preds = %for.body, %entry
   %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
   %arrayidx = getelementptr inbounds [40000 x i8], [40000 x i8] addrspace(1)* @Y, i64 0, i64 %indvars.iv
-  %0 = load i8 addrspace(1)* %arrayidx, align 1
+  %0 = load i8, i8 addrspace(1)* %arrayidx, align 1
   %add = add i8 %0, 1
   %arrayidx3 = getelementptr inbounds [40000 x i8], [40000 x i8]* @X, i64 0, i64 %indvars.iv
   store i8 %add, i8* %arrayidx3, align 1