[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/R600/ds-negative-offset-addressing-mode-loop.ll b/llvm/test/CodeGen/R600/ds-negative-offset-addressing-mode-loop.ll
index 6ec87a8..c381fc4 100644
--- a/llvm/test/CodeGen/R600/ds-negative-offset-addressing-mode-loop.ll
+++ b/llvm/test/CodeGen/R600/ds-negative-offset-addressing-mode-loop.ll
@@ -34,19 +34,19 @@
   %k.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
   tail call void @llvm.AMDGPU.barrier.local() #1
   %arrayidx = getelementptr inbounds float, float addrspace(3)* %lptr, i32 %offset.02
-  %tmp = load float addrspace(3)* %arrayidx, align 4
+  %tmp = load float, float addrspace(3)* %arrayidx, align 4
   %add1 = add nsw i32 %offset.02, 1
   %arrayidx2 = getelementptr inbounds float, float addrspace(3)* %lptr, i32 %add1
-  %tmp1 = load float addrspace(3)* %arrayidx2, align 4
+  %tmp1 = load float, float addrspace(3)* %arrayidx2, align 4
   %add3 = add nsw i32 %offset.02, 32
   %arrayidx4 = getelementptr inbounds float, float addrspace(3)* %lptr, i32 %add3
-  %tmp2 = load float addrspace(3)* %arrayidx4, align 4
+  %tmp2 = load float, float addrspace(3)* %arrayidx4, align 4
   %add5 = add nsw i32 %offset.02, 33
   %arrayidx6 = getelementptr inbounds float, float addrspace(3)* %lptr, i32 %add5
-  %tmp3 = load float addrspace(3)* %arrayidx6, align 4
+  %tmp3 = load float, float addrspace(3)* %arrayidx6, align 4
   %add7 = add nsw i32 %offset.02, 64
   %arrayidx8 = getelementptr inbounds float, float addrspace(3)* %lptr, i32 %add7
-  %tmp4 = load float addrspace(3)* %arrayidx8, align 4
+  %tmp4 = load float, float addrspace(3)* %arrayidx8, align 4
   %add9 = fadd float %tmp, %tmp1
   %add10 = fadd float %add9, %tmp2
   %add11 = fadd float %add10, %tmp3