[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/AddDiscriminators/basic.ll b/llvm/test/Transforms/AddDiscriminators/basic.ll
index 7c8b3d3..464e7e7 100644
--- a/llvm/test/Transforms/AddDiscriminators/basic.ll
+++ b/llvm/test/Transforms/AddDiscriminators/basic.ll
@@ -16,13 +16,13 @@
   %i.addr = alloca i32, align 4
   %x = alloca i32, align 4
   store i32 %i, i32* %i.addr, align 4
-  %0 = load i32* %i.addr, align 4, !dbg !10
+  %0 = load i32, i32* %i.addr, align 4, !dbg !10
   %cmp = icmp slt i32 %0, 10, !dbg !10
   br i1 %cmp, label %if.then, label %if.end, !dbg !10
 
 if.then:                                          ; preds = %entry
-  %1 = load i32* %i.addr, align 4, !dbg !10
-; CHECK:  %1 = load i32* %i.addr, align 4, !dbg !12
+  %1 = load i32, i32* %i.addr, align 4, !dbg !10
+; CHECK:  %1 = load i32, i32* %i.addr, align 4, !dbg !12
 
   store i32 %1, i32* %x, align 4, !dbg !10
 ; CHECK:  store i32 %1, i32* %x, align 4, !dbg !12