[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/Thumb2/2010-08-10-VarSizedAllocaBug.ll b/llvm/test/CodeGen/Thumb2/2010-08-10-VarSizedAllocaBug.ll
index 3d5e500..94562d7 100644
--- a/llvm/test/CodeGen/Thumb2/2010-08-10-VarSizedAllocaBug.ll
+++ b/llvm/test/CodeGen/Thumb2/2010-08-10-VarSizedAllocaBug.ll
@@ -16,7 +16,7 @@
   %1 = alloca [1000 x i8], align 4                ; <[1000 x i8]*> [#uses=1]
   %.sub = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i32 0, i32 0 ; <i8*> [#uses=2]
   %2 = call i32 (i8*, i32, i32, i8*, ...)* @__sprintf_chk(i8* %.sub, i32 0, i32 1000, i8* getelementptr inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 %i) nounwind ; <i32> [#uses=0]
-  %3 = load i8* %.sub, align 4                    ; <i8> [#uses=1]
+  %3 = load i8, i8* %.sub, align 4                    ; <i8> [#uses=1]
   %4 = sext i8 %3 to i32                          ; <i32> [#uses=1]
   ret i32 %4