[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/ScalarRepl/2008-01-29-PromoteBug.ll b/llvm/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll
index 343fa1d..99366b3 100644
--- a/llvm/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll
+++ b/llvm/test/Transforms/ScalarRepl/2008-01-29-PromoteBug.ll
@@ -13,7 +13,7 @@
 	%tmp16 = getelementptr [1 x %struct.T], [1 x %struct.T]* %s, i32 0, i32 0		; <%struct.T*> [#uses=1]
 	%tmp17 = getelementptr %struct.T, %struct.T* %tmp16, i32 0, i32 1		; <[3 x i8]*> [#uses=1]
 	%tmp1718 = bitcast [3 x i8]* %tmp17 to i32*		; <i32*> [#uses=1]
-	%tmp19 = load i32* %tmp1718, align 4		; <i32> [#uses=1]
+	%tmp19 = load i32, i32* %tmp1718, align 4		; <i32> [#uses=1]
 	%mask = and i32 %tmp19, 16777215		; <i32> [#uses=2]
 	%mask2324 = trunc i32 %mask to i8		; <i8> [#uses=1]
 	ret i8 %mask2324