[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/Mips/micromips-shift.ll b/llvm/test/CodeGen/Mips/micromips-shift.ll
index 8215010..ed1bcbb 100644
--- a/llvm/test/CodeGen/Mips/micromips-shift.ll
+++ b/llvm/test/CodeGen/Mips/micromips-shift.ll
@@ -8,11 +8,11 @@
 
 define i32 @shift_left() nounwind {
 entry:
-  %0 = load i32* @a, align 4
+  %0 = load i32, i32* @a, align 4
   %shl = shl i32 %0, 4
   store i32 %shl, i32* @b, align 4
 
-  %1 = load i32* @c, align 4
+  %1 = load i32, i32* @c, align 4
   %shl1 = shl i32 %1, 10
   store i32 %shl1, i32* @d, align 4
 
@@ -29,11 +29,11 @@
 
 define i32 @shift_right() nounwind {
 entry:
-  %0 = load i32* @i, align 4
+  %0 = load i32, i32* @i, align 4
   %shr = lshr i32 %0, 4
   store i32 %shr, i32* @j, align 4
 
-  %1 = load i32* @m, align 4
+  %1 = load i32, i32* @m, align 4
   %shr1 = lshr i32 %1, 10
   store i32 %shr1, i32* @n, align 4