[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/X86/avoid_complex_am.ll b/llvm/test/CodeGen/X86/avoid_complex_am.ll
index fa90a35..fafa236 100644
--- a/llvm/test/CodeGen/X86/avoid_complex_am.ll
+++ b/llvm/test/CodeGen/X86/avoid_complex_am.ll
@@ -20,12 +20,12 @@
   %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
   %tmp = add nsw i64 %indvars.iv, -1
   %arrayidx = getelementptr inbounds double, double* %b, i64 %tmp
-  %tmp1 = load double* %arrayidx, align 8
+  %tmp1 = load double, double* %arrayidx, align 8
 ; The induction variable should carry the scaling factor: 1.
 ; CHECK: [[IVNEXT]] = add nuw nsw i64 [[IV]], 1
   %indvars.iv.next = add i64 %indvars.iv, 1
   %arrayidx2 = getelementptr inbounds double, double* %c, i64 %indvars.iv.next
-  %tmp2 = load double* %arrayidx2, align 8
+  %tmp2 = load double, double* %arrayidx2, align 8
   %mul = fmul double %tmp1, %tmp2
   %arrayidx4 = getelementptr inbounds double, double* %a, i64 %indvars.iv
   store double %mul, double* %arrayidx4, align 8