[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/ppc440-fp-basic.ll b/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
index af0cef4..9577357 100644
--- a/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
+++ b/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
@@ -5,13 +5,13 @@
 define void @maybe_an_fma(%0* sret %agg.result, %0* byval %a, %0* byval %b, %0* byval %c) nounwind {
 entry:
   %a.realp = getelementptr inbounds %0, %0* %a, i32 0, i32 0
-  %a.real = load double* %a.realp
+  %a.real = load double, double* %a.realp
   %a.imagp = getelementptr inbounds %0, %0* %a, i32 0, i32 1
-  %a.imag = load double* %a.imagp
+  %a.imag = load double, double* %a.imagp
   %b.realp = getelementptr inbounds %0, %0* %b, i32 0, i32 0
-  %b.real = load double* %b.realp
+  %b.real = load double, double* %b.realp
   %b.imagp = getelementptr inbounds %0, %0* %b, i32 0, i32 1
-  %b.imag = load double* %b.imagp
+  %b.imag = load double, double* %b.imagp
   %mul.rl = fmul double %a.real, %b.real
   %mul.rr = fmul double %a.imag, %b.imag
   %mul.r = fsub double %mul.rl, %mul.rr
@@ -19,9 +19,9 @@
   %mul.ir = fmul double %a.real, %b.imag
   %mul.i = fadd double %mul.il, %mul.ir
   %c.realp = getelementptr inbounds %0, %0* %c, i32 0, i32 0
-  %c.real = load double* %c.realp
+  %c.real = load double, double* %c.realp
   %c.imagp = getelementptr inbounds %0, %0* %c, i32 0, i32 1
-  %c.imag = load double* %c.imagp
+  %c.imag = load double, double* %c.imagp
   %add.r = fadd double %mul.r, %c.real
   %add.i = fadd double %mul.i, %c.imag
   %real = getelementptr inbounds %0, %0* %agg.result, i32 0, i32 0