[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/CodeGen/ARM/ldstrex.ll b/llvm/test/CodeGen/ARM/ldstrex.ll
index edcf116..59349f7 100644
--- a/llvm/test/CodeGen/ARM/ldstrex.ll
+++ b/llvm/test/CodeGen/ARM/ldstrex.ll
@@ -106,14 +106,14 @@
 
 define void @excl_addrmode() {
 ; CHECK-T2ADDRMODE-LABEL: excl_addrmode:
-  %base1020 = load i32** @base
+  %base1020 = load i32*, i32** @base
   %offset1020 = getelementptr i32, i32* %base1020, i32 255
   call i32 @llvm.arm.ldrex.p0i32(i32* %offset1020)
   call i32 @llvm.arm.strex.p0i32(i32 0, i32* %offset1020)
 ; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [{{r[0-9]+}}, #1020]
 ; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [{{r[0-9]+}}, #1020]
 
-  %base1024 = load i32** @base
+  %base1024 = load i32*, i32** @base
   %offset1024 = getelementptr i32, i32* %base1024, i32 256
   call i32 @llvm.arm.ldrex.p0i32(i32* %offset1024)
   call i32 @llvm.arm.strex.p0i32(i32 0, i32* %offset1024)
@@ -121,7 +121,7 @@
 ; CHECK-T2ADDRMODE: ldrex {{r[0-9]+}}, [r[[ADDR]]]
 ; CHECK-T2ADDRMODE: strex {{r[0-9]+}}, {{r[0-9]+}}, [r[[ADDR]]]
 
-  %base1 = load i32** @base
+  %base1 = load i32*, i32** @base
   %addr8 = bitcast i32* %base1 to i8*
   %offset1_8 = getelementptr i8, i8* %addr8, i32 1
   %offset1 = bitcast i8* %offset1_8 to i32*