[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/GlobalOpt/tls.ll b/llvm/test/Transforms/GlobalOpt/tls.ll
index 59ae23a..beea178 100644
--- a/llvm/test/Transforms/GlobalOpt/tls.ll
+++ b/llvm/test/Transforms/GlobalOpt/tls.ll
@@ -24,14 +24,14 @@
   store i32 0, i32* getelementptr inbounds ([100 x i32]* @x, i64 0, i64 1), align 4
 
   ; Read the value of @ip, which now points at x[1] for thread 2.
-  %0 = load i32** @ip, align 8
+  %0 = load i32*, i32** @ip, align 8
 
-  %1 = load i32* %0, align 4
+  %1 = load i32, i32* %0, align 4
   ret i32 %1
 
 ; CHECK-LABEL: @f(
 ; Make sure that the load from @ip hasn't been removed.
-; CHECK: load i32** @ip
+; CHECK: load i32*, i32** @ip
 ; CHECK: ret
 }