Update DXILForwardHandleAccesses.cpp to look at Operand 0 instead of 1 to account for intrinsic changes.

Author: farzonl

llvm/lib/Target/DirectX/DXILForwardHandleAccesses.cpp

@@ -87,8 +87,8 @@ static bool forwardHandleAccesses(Function &F, DominatorTree &DT) {
         // store them so that we may delete the alloca matches
         case Intrinsic::lifetime_start:
         case Intrinsic::lifetime_end:
-          if (II->arg_size() >= 2) {
-            Value *Ptr = II->getArgOperand(1);
+          if (II->arg_size() >= 1) {
+            Value *Ptr = II->getArgOperand(0);
             if (auto *Alloca = dyn_cast<AllocaInst>(Ptr->stripPointerCasts()))
               LifeTimeIntrinsicMap[Alloca].push_back(II);
           }

llvm/test/CodeGen/DirectX/forward_handle_on_alloca.ll

@@ -27,11 +27,11 @@ entry:
   %handle  = tail call target("dx.RawBuffer", i32, 1, 0) @llvm.dx.resource.handlefrombinding.tdx.RawBuffer_i32_1_0t(i32 0, i32 3, i32 1, i32 0, i1 false, ptr nonnull @name)
   store target("dx.RawBuffer", i32, 1, 0) %handle , ptr @global, align 4
   %val  = load i32, ptr @global, align 4
-  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %alloca)
+  call void @llvm.lifetime.start.p0(ptr nonnull %alloca)
   store i32 %val , ptr  %alloca, align 8
   %indirect = load target("dx.RawBuffer", i32, 1, 0), ptr  %alloca, align 8
   %buff = tail call noundef nonnull align 4 dereferenceable(4) ptr @llvm.dx.resource.getpointer.p0.tdx.RawBuffer_i32_1_0t(target("dx.RawBuffer", i32, 1, 0) %indirect, i32 0)
   store i32 0, ptr %buff, align 4
-  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %alloca)
+  call void @llvm.lifetime.end.p0(ptr nonnull %alloca)
   ret void
 }