[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/Analysis/BasicAA/2007-12-08-OutOfBoundsCrash.ll b/llvm/test/Analysis/BasicAA/2007-12-08-OutOfBoundsCrash.ll
index ceba1d2..20be13d 100644
--- a/llvm/test/Analysis/BasicAA/2007-12-08-OutOfBoundsCrash.ll
+++ b/llvm/test/Analysis/BasicAA/2007-12-08-OutOfBoundsCrash.ll
@@ -14,7 +14,7 @@
 define i32 @ehci_pci_setup(%struct.usb_hcd* %hcd) {
 entry:
 	%tmp14 = getelementptr %struct.usb_hcd, %struct.usb_hcd* %hcd, i32 0, i32 0, i32 0		; <%struct.device**> [#uses=1]
-	%tmp15 = load %struct.device** %tmp14, align 8		; <%struct.device*> [#uses=0]
+	%tmp15 = load %struct.device*, %struct.device** %tmp14, align 8		; <%struct.device*> [#uses=0]
 	br i1 false, label %bb25, label %return
 
 bb25:		; preds = %entry
@@ -23,7 +23,7 @@
 cond_true:		; preds = %bb25
 	%tmp601 = getelementptr %struct.usb_hcd, %struct.usb_hcd* %hcd, i32 0, i32 1, i64 2305843009213693951		; <i64*> [#uses=1]
 	%tmp67 = bitcast i64* %tmp601 to %struct.device**		; <%struct.device**> [#uses=1]
-	%tmp68 = load %struct.device** %tmp67, align 8		; <%struct.device*> [#uses=0]
+	%tmp68 = load %struct.device*, %struct.device** %tmp67, align 8		; <%struct.device*> [#uses=0]
 	ret i32 undef
 
 return:		; preds = %bb25, %entry