[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/LoopSimplify/phi-node-simplify.ll b/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll
index 52b7aa5..676f467 100644
--- a/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll
+++ b/llvm/test/Transforms/LoopSimplify/phi-node-simplify.ll
@@ -28,13 +28,13 @@
 	%b.1.4 = getelementptr i32, i32* %b.1.4.ph, i64 %gep.upgrd.3		; <i32*> [#uses=1]
 	%inc.0.rec = add i32 %b.1.4.rec, 1		; <i32> [#uses=2]
 	%inc.0 = getelementptr i32, i32* %a.0.4.ph, i32 %inc.0.rec		; <i32*> [#uses=2]
-	%tmp.13 = load i32* %a.0.4		; <i32> [#uses=1]
+	%tmp.13 = load i32, i32* %a.0.4		; <i32> [#uses=1]
 	%inc.1 = getelementptr i32, i32* %b.1.4.ph, i32 %inc.0.rec		; <i32*> [#uses=1]
-	%tmp.15 = load i32* %b.1.4		; <i32> [#uses=1]
-	%tmp.18 = load i32* %c.2.4		; <i32> [#uses=1]
+	%tmp.15 = load i32, i32* %b.1.4		; <i32> [#uses=1]
+	%tmp.18 = load i32, i32* %c.2.4		; <i32> [#uses=1]
 	%tmp.16 = mul i32 %tmp.15, %tmp.13		; <i32> [#uses=1]
 	%tmp.19 = mul i32 %tmp.16, %tmp.18		; <i32> [#uses=1]
-	%tmp.20 = load i32* @Z		; <i32> [#uses=1]
+	%tmp.20 = load i32, i32* @Z		; <i32> [#uses=1]
 	%tmp.21 = add i32 %tmp.19, %tmp.20		; <i32> [#uses=1]
 	store i32 %tmp.21, i32* @Z
 	%indvar.next = add i32 %indvar, 1		; <i32> [#uses=2]