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

[python3kgae]

Summary

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

[beanz]

LGTM!

llvm/lib/Target/DirectX/DXILPrepare.cpp

for (auto &F : M.functions()) {
             Builder.SetInsertPoint(&I);
             Value *In = I.getOperand(0);
             Value *Zero = ConstantFP::get(In->getType(), -0.0);
             I.replaceAllUsesWith(Builder.CreateFSub(Zero, In));
             I.eraseFromParent();
             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
           // unmodified as it reserves instruction IDs during contruction.
           if (auto LI = dyn_cast<LoadInst>(&I)) {
             if (Value *NoOpBitcast = maybeGenerateBitcast(
                     Builder, PointerTypes, I, LI->getPointerOperand(),
                     LI->getType())) {

llvm/test/CodeGen/DirectX/typed_ptr.ll

+; 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
+}