[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/remove_lsr.ll b/llvm/test/CodeGen/Hexagon/remove_lsr.ll
index 640fdb5..3b85c48 100644
--- a/llvm/test/CodeGen/Hexagon/remove_lsr.ll
+++ b/llvm/test/CodeGen/Hexagon/remove_lsr.ll
@@ -54,9 +54,9 @@
   %7 = trunc i64 %6 to i32
   %8 = tail call i32 @llvm.hexagon.C2.mux(i32 %conv8, i32 %5, i32 %7)
   store i32 %8, i32* %lsr.iv2931, align 4
-  %srcval = load i64* %lsr.iv27, align 8
-  %9 = load i8* %lsr.iv40, align 1
-  %10 = load i8* %lsr.iv37, align 1
+  %srcval = load i64, i64* %lsr.iv27, align 8
+  %9 = load i8, i8* %lsr.iv40, align 1
+  %10 = load i8, i8* %lsr.iv37, align 1
   %lftr.wideiv = trunc i32 %lsr.iv42 to i8
   %exitcond = icmp eq i8 %lftr.wideiv, 32
   %scevgep26 = getelementptr %union.vect64, %union.vect64* %lsr.iv, i32 1