[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/ARM/2009-04-08-FloatUndef.ll b/llvm/test/CodeGen/ARM/2009-04-08-FloatUndef.ll
index 9e32e05..949e107 100644
--- a/llvm/test/CodeGen/ARM/2009-04-08-FloatUndef.ll
+++ b/llvm/test/CodeGen/ARM/2009-04-08-FloatUndef.ll
@@ -2,7 +2,7 @@
 
 define void @execute_shader(<4 x float>* %OUT, <4 x float>* %IN, <4 x float>* %CONST) {
 entry:
-	%input2 = load <4 x float>* null, align 16		; <<4 x float>> [#uses=2]
+	%input2 = load <4 x float>, <4 x float>* null, align 16		; <<4 x float>> [#uses=2]
 	%shuffle7 = shufflevector <4 x float> %input2, <4 x float> <float 0.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00>, <4 x i32> <i32 2, i32 2, i32 2, i32 2>		; <<4 x float>> [#uses=1]
 	%mul1 = fmul <4 x float> %shuffle7, zeroinitializer		; <<4 x float>> [#uses=1]
 	%add2 = fadd <4 x float> %mul1, %input2		; <<4 x float>> [#uses=1]