[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/Thumb/2009-08-12-RegInfoAssert.ll b/llvm/test/CodeGen/Thumb/2009-08-12-RegInfoAssert.ll
index ba353fb0..8f23f06 100644
--- a/llvm/test/CodeGen/Thumb/2009-08-12-RegInfoAssert.ll
+++ b/llvm/test/CodeGen/Thumb/2009-08-12-RegInfoAssert.ll
@@ -16,14 +16,14 @@
 	br label %bb11
 
 bb6:                                              ; preds = %bb11
-	%4 = load i8*** %3, align 4               ; <i8**> [#uses=1]
+	%4 = load i8**, i8*** %3, align 4               ; <i8**> [#uses=1]
 	%scevgep = getelementptr i8*, i8** %4, i32 %8  ; <i8**> [#uses=1]
-	%5 = load i8** %scevgep, align 4          ; <i8*> [#uses=1]
+	%5 = load i8*, i8** %scevgep, align 4          ; <i8*> [#uses=1]
 	br label %bb3.i
 
 bb3.i:                                            ; preds = %bb3.i, %bb6
 	%scevgep7.i = getelementptr i8, i8* %5, i32 0 ; <i8*> [#uses=1]
-	%6 = load i8* %scevgep7.i, align 1        ; <i8> [#uses=0]
+	%6 = load i8, i8* %scevgep7.i, align 1        ; <i8> [#uses=0]
 	br i1 undef, label %bb3.i, label %bb10
 
 bb10:                                             ; preds = %bb3.i