[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/PowerPC/no-extra-fp-conv-ldst.ll b/llvm/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll
index 6beee25..26739bf 100644
--- a/llvm/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll
+++ b/llvm/test/CodeGen/PowerPC/no-extra-fp-conv-ldst.ll
@@ -5,7 +5,7 @@
 ; Function Attrs: nounwind readonly
 define double @test1(i64* nocapture readonly %x) #0 {
 entry:
-  %0 = load i64* %x, align 8
+  %0 = load i64, i64* %x, align 8
   %conv = sitofp i64 %0 to double
   ret double %conv
 
@@ -18,7 +18,7 @@
 ; Function Attrs: nounwind readonly
 define double @test2(i32* nocapture readonly %x) #0 {
 entry:
-  %0 = load i32* %x, align 4
+  %0 = load i32, i32* %x, align 4
   %conv = sitofp i32 %0 to double
   ret double %conv