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Stack spilling reported by Mali Offline Complier

From the guide, this value is related to register pressure. However, I find that some shader with high "work register" have "stack spilling = false", but some shader with low "work register" have "stack spilling = true". It does not make sense for me.

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Peter Harris over 4 years ago +1 suggested

The number of work registers available is configurable (the compiler can choose; assigning more registers reduces spilling but also reduces thread occupancy so "more registers" isn't always the right choice...
Kévin Petit over 4 years ago in reply to Peter Harris +1

Adding to Pete's answer, our OpenCL compiler does give kernel authors the option to choose the precise register allocation using the -fregister-allocation compiler option. See https://www.khronos.org/registry...

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0 Kévin Petit over 4 years ago in reply to Peter Harris

Adding to Pete's answer, our OpenCL compiler does give kernel authors the option to choose the precise register allocation using the -fregister-allocation compiler option. See https://www.khronos.org/registry/OpenCL/extensions/arm/cl_arm_scheduling_controls.html for the full specification.

Regards,

Kevin
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0 Kévin Petit over 4 years ago in reply to Peter Harris

Adding to Pete's answer, our OpenCL compiler does give kernel authors the option to choose the precise register allocation using the -fregister-allocation compiler option. See https://www.khronos.org/registry/OpenCL/extensions/arm/cl_arm_scheduling_controls.html for the full specification.

Regards,

Kevin
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