[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/Generic/print-mul.ll b/llvm/test/CodeGen/Generic/print-mul.ll
index 782d664..06f2b40 100644
--- a/llvm/test/CodeGen/Generic/print-mul.ll
+++ b/llvm/test/CodeGen/Generic/print-mul.ll
@@ -10,8 +10,8 @@
 
 define i32 @main() {
 entry:
-	%a = load i32* @A		; <i32> [#uses=2]
-	%b = load i32* @B		; <i32> [#uses=1]
+	%a = load i32, i32* @A		; <i32> [#uses=2]
+	%b = load i32, i32* @B		; <i32> [#uses=1]
 	%a_s = getelementptr [8 x i8], [8 x i8]* @a_str, i64 0, i64 0		; <i8*> [#uses=1]
 	%b_s = getelementptr [8 x i8], [8 x i8]* @b_str, i64 0, i64 0		; <i8*> [#uses=1]
 	%a_mul_s = getelementptr [13 x i8], [13 x i8]* @a_mul_str, i64 0, i64 0		; <i8*> [#uses=1]