[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/DebugInfo/namespace_inline_function_definition.ll b/llvm/test/DebugInfo/namespace_inline_function_definition.ll
index b6f1b5f..f326a74 100644
--- a/llvm/test/DebugInfo/namespace_inline_function_definition.ll
+++ b/llvm/test/DebugInfo/namespace_inline_function_definition.ll
@@ -40,10 +40,10 @@
   %i.addr.i = alloca i32, align 4
   %retval = alloca i32, align 4
   store i32 0, i32* %retval
-  %0 = load i32* @x, align 4, !dbg !16
+  %0 = load i32, i32* @x, align 4, !dbg !16
   store i32 %0, i32* %i.addr.i, align 4
   call void @llvm.dbg.declare(metadata i32* %i.addr.i, metadata !17, metadata !{!"0x102"}), !dbg !18
-  %1 = load i32* %i.addr.i, align 4, !dbg !18
+  %1 = load i32, i32* %i.addr.i, align 4, !dbg !18
   %mul.i = mul nsw i32 %1, 2, !dbg !18
   ret i32 %mul.i, !dbg !16
 }
@@ -54,7 +54,7 @@
   %i.addr = alloca i32, align 4
   store i32 %i, i32* %i.addr, align 4
   call void @llvm.dbg.declare(metadata i32* %i.addr, metadata !17, metadata !{!"0x102"}), !dbg !19
-  %0 = load i32* %i.addr, align 4, !dbg !19
+  %0 = load i32, i32* %i.addr, align 4, !dbg !19
   %mul = mul nsw i32 %0, 2, !dbg !19
   ret i32 %mul, !dbg !19
 }