[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/SystemZ/frame-14.ll b/llvm/test/CodeGen/SystemZ/frame-14.ll
index 21ef40a..3c080a4 100644
--- a/llvm/test/CodeGen/SystemZ/frame-14.ll
+++ b/llvm/test/CodeGen/SystemZ/frame-14.ll
@@ -245,11 +245,11 @@
 ; CHECK-FP: mvi 0([[REGISTER]]), 42
 ; CHECK-FP: lg [[REGISTER]], [[OFFSET]](%r11)
 ; CHECK-FP: br %r14
-  %i0 = load volatile i32 *%vptr
-  %i1 = load volatile i32 *%vptr
-  %i3 = load volatile i32 *%vptr
-  %i4 = load volatile i32 *%vptr
-  %i5 = load volatile i32 *%vptr
+  %i0 = load volatile i32 , i32 *%vptr
+  %i1 = load volatile i32 , i32 *%vptr
+  %i3 = load volatile i32 , i32 *%vptr
+  %i4 = load volatile i32 , i32 *%vptr
+  %i5 = load volatile i32 , i32 *%vptr
   %region1 = alloca [524104 x i8], align 8
   %region2 = alloca [524104 x i8], align 8
   %ptr1 = getelementptr inbounds [524104 x i8], [524104 x i8]* %region1, i64 0, i64 8
@@ -278,20 +278,20 @@
 ; CHECK-NOFP: lg [[REGISTER]], [[OFFSET]](%r15)
 ; CHECK-NOFP: lmg %r6, %r15,
 ; CHECK-NOFP: br %r14
-  %i0 = load volatile i32 *%vptr
-  %i1 = load volatile i32 *%vptr
-  %i3 = load volatile i32 *%vptr
-  %i4 = load volatile i32 *%vptr
-  %i5 = load volatile i32 *%vptr
-  %i6 = load volatile i32 *%vptr
-  %i7 = load volatile i32 *%vptr
-  %i8 = load volatile i32 *%vptr
-  %i9 = load volatile i32 *%vptr
-  %i10 = load volatile i32 *%vptr
-  %i11 = load volatile i32 *%vptr
-  %i12 = load volatile i32 *%vptr
-  %i13 = load volatile i32 *%vptr
-  %i14 = load volatile i32 *%vptr
+  %i0 = load volatile i32 , i32 *%vptr
+  %i1 = load volatile i32 , i32 *%vptr
+  %i3 = load volatile i32 , i32 *%vptr
+  %i4 = load volatile i32 , i32 *%vptr
+  %i5 = load volatile i32 , i32 *%vptr
+  %i6 = load volatile i32 , i32 *%vptr
+  %i7 = load volatile i32 , i32 *%vptr
+  %i8 = load volatile i32 , i32 *%vptr
+  %i9 = load volatile i32 , i32 *%vptr
+  %i10 = load volatile i32 , i32 *%vptr
+  %i11 = load volatile i32 , i32 *%vptr
+  %i12 = load volatile i32 , i32 *%vptr
+  %i13 = load volatile i32 , i32 *%vptr
+  %i14 = load volatile i32 , i32 *%vptr
   %region1 = alloca [524104 x i8], align 8
   %region2 = alloca [524104 x i8], align 8
   %ptr1 = getelementptr inbounds [524104 x i8], [524104 x i8]* %region1, i64 0, i64 8