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ciflow/xpu/190637

ciflow/xpu/190637: [XPU] Skip CUDA stream event codegen in AOTI cpp_wrapper for XPU
@xuhancn xuhancn tagged this 03 Aug 13:43 
The user-streams support PR #182971 added _ensure_aoti_stream_helpers_emitted()
which generates CUDA-specific AOTIPerThreadEventCache and AOTIPerThreadStreamCache
helper classes, along with cudaEventRecord/cudaEventSynchronize calls.

These helpers are emitted from multiple code paths in CppWrapperGpu:
1. codegen_stream_info_prologue() — when multiple streams detected
2. _emit_stream_op_inline() — when stream ops like record_event are used
3. codegen_enter_cuda_stream_context() — when switching to non-default stream
4. codegen_exit_cuda_stream_context() — when leaving a non-default stream

On XPU, SYCL in-order queues handle events implicitly. Skip all four paths.

Verified on PVC (driver 1.6.33578) and BMG (Intel Arc Pro B60): D2H copy PASS.

Fixes #189327
Fixes #189326
Assets 2
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