[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/Hexagon/cext-valid-packet2.ll b/llvm/test/CodeGen/Hexagon/cext-valid-packet2.ll
index 03904d9..2eba743 100644
--- a/llvm/test/CodeGen/Hexagon/cext-valid-packet2.ll
+++ b/llvm/test/CodeGen/Hexagon/cext-valid-packet2.ll
@@ -10,24 +10,24 @@
 define i32 @test(i32* nocapture %a, i32* nocapture %b, i32 %c) nounwind {
 entry:
   %add = add nsw i32 %c, 200002
-  %0 = load i32* %a, align 4
+  %0 = load i32, i32* %a, align 4
   %add1 = add nsw i32 %0, 200000
   %arrayidx2 = getelementptr inbounds i32, i32* %a, i32 3000
   store i32 %add1, i32* %arrayidx2, align 4
-  %1 = load i32* %b, align 4
+  %1 = load i32, i32* %b, align 4
   %add4 = add nsw i32 %1, 200001
   %arrayidx5 = getelementptr inbounds i32, i32* %a, i32 1
   store i32 %add4, i32* %arrayidx5, align 4
   %arrayidx7 = getelementptr inbounds i32, i32* %b, i32 1
-  %2 = load i32* %arrayidx7, align 4
+  %2 = load i32, i32* %arrayidx7, align 4
   %cmp = icmp sgt i32 %add4, %2
   br i1 %cmp, label %if.then, label %if.else
 
 if.then:                                          ; preds = %entry
   %arrayidx8 = getelementptr inbounds i32, i32* %a, i32 2
-  %3 = load i32* %arrayidx8, align 4
+  %3 = load i32, i32* %arrayidx8, align 4
   %arrayidx9 = getelementptr inbounds i32, i32* %b, i32 2000
-  %4 = load i32* %arrayidx9, align 4
+  %4 = load i32, i32* %arrayidx9, align 4
   %sub = sub nsw i32 %3, %4
   %arrayidx10 = getelementptr inbounds i32, i32* %a, i32 4000
   store i32 %sub, i32* %arrayidx10, align 4