[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/RewriteStatepointsForGC/basics.ll b/llvm/test/Transforms/RewriteStatepointsForGC/basics.ll
index 252d5f1..c1a1e4e 100644
--- a/llvm/test/Transforms/RewriteStatepointsForGC/basics.ll
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/basics.ll
@@ -35,14 +35,14 @@
 ; CHECK-NEXT: gc.statepoint
 ; CHECK-NEXT: %derived.relocated = call coldcc i8 addrspace(1)*
 ; CHECK-NEXT: %obj.relocated = call coldcc i8 addrspace(1)*
-; CHECK-NEXT: load i8 addrspace(1)* %derived.relocated
-; CHECK-NEXT: load i8 addrspace(1)* %obj.relocated
+; CHECK-NEXT: load i8, i8 addrspace(1)* %derived.relocated
+; CHECK-NEXT: load i8, i8 addrspace(1)* %obj.relocated
 entry:
   %derived = getelementptr i8, i8 addrspace(1)* %obj, i64 10
   call i32 (void ()*, i32, i32, ...)* @llvm.experimental.gc.statepoint.p0f_isVoidf(void ()* @foo, i32 0, i32 0, i32 5, i32 0, i32 -1, i32 0, i32 0, i32 0)
 
-  %a = load i8 addrspace(1)* %derived
-  %b = load i8 addrspace(1)* %obj
+  %a = load i8, i8 addrspace(1)* %derived
+  %b = load i8, i8 addrspace(1)* %obj
   %c = sub i8 %a, %b
   ret i8 %c
 }