[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/SimplifyCFG/switch-to-select-multiple-edge-per-block-phi.ll b/llvm/test/Transforms/SimplifyCFG/switch-to-select-multiple-edge-per-block-phi.ll
index ddf5d1f..f5359b5 100644
--- a/llvm/test/Transforms/SimplifyCFG/switch-to-select-multiple-edge-per-block-phi.ll
+++ b/llvm/test/Transforms/SimplifyCFG/switch-to-select-multiple-edge-per-block-phi.ll
@@ -20,12 +20,12 @@
 ; CHECK: %switch.selectcmp1 = icmp eq i32 %1, 5
 ; CHECK: %switch.select2 = select i1 %switch.selectcmp1, i32 5, i32 %switch.select
 entry:
-  %0 = load i32* @b, align 4
+  %0 = load i32, i32* @b, align 4
   %tobool = icmp eq i32 %0, 0
   br i1 %tobool, label %if.end3, label %if.then
 
 if.then:
-  %1 = load i32* @a, align 4
+  %1 = load i32, i32* @a, align 4
   switch i32 %1, label %if.end3 [
     i32 5, label %return
     i32 0, label %return