[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/IPConstantProp/2009-09-24-byval-ptr.ll b/llvm/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll
index 03ebf0b..735597a 100644
--- a/llvm/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll
+++ b/llvm/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll
@@ -20,11 +20,11 @@
 define internal i32 @vfu2(%struct.MYstr* byval align 4 %u) nounwind readonly {
 entry:
   %0 = getelementptr %struct.MYstr, %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1]
-  %1 = load i32* %0
-; CHECK: load i32* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 1)
+  %1 = load i32, i32* %0
+; CHECK: load i32, i32* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 1)
   %2 = getelementptr %struct.MYstr, %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1]
-  %3 = load i8* %2
-; CHECK: load i8* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 0)
+  %3 = load i8, i8* %2
+; CHECK: load i8, i8* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 0)
   %4 = zext i8 %3 to i32
   %5 = add i32 %4, %1
   ret i32 %5