[DirectX][Fail crash in DXILPrepareModule pass when input has typed ptr.

Check supportsTypedPointers instead of hasSetOpaquePointersValue when query if has typed ptr.

Reviewed By: beanz

Differential Revision: https://reviews.llvm.org/D127268

llvm/lib/Target/DirectX/DXILPrepare.cpp

@@ -127,7 +127,7 @@ public:
             continue;
           }
           // Only insert bitcasts if the IR is using opaque pointers.
-          if (!M.getContext().hasSetOpaquePointersValue())
+          if (M.getContext().supportsTypedPointers())
             continue;
 
           // Emtting NoOp bitcast instructions allows the ValueEnumerator to be

llvm/test/CodeGen/DirectX/typed_ptr.ll

@@ -0,0 +1,10 @@
+; RUN: opt -S -dxil-prepare < %s | FileCheck %s
+target triple = "dxil-unknown-unknown"
+
+; Make sure not crash when has typed ptr.
+; CHECK:@test
+
+define i64 @test(i64* %p) {
+  %v = load i64, i64* %p
+  ret i64 %v
+}