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SPIR-V: Initialize undefined variables with 0 (#3526)
* SPIR-V: Initialize undefined variables with a value Changes undefined values on spir-v shaders (caused by phi nodes) to be initialized instead of truly undefined. Fixes an issue with NVIDIA gpus seemingly not liking when a variable is _potentially_ undefined. Not sure about the details at the moment. Fixes: - Tilt shift blur effect in Link's Awakening (bottom of the screen) - Potentially block flickering on newer NVIDIA gpus in Splatoon 2? Needs testing. Testing is welcome. * Update Ryujinx.Graphics.Shader/CodeGen/Spirv/CodeGenContext.cs Co-authored-by: gdkchan <gab.dark.100@gmail.com> Co-authored-by: gdkchan <gab.dark.100@gmail.com>
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@ -22,7 +22,7 @@ namespace Ryujinx.Graphics.Gpu.Shader.DiskCache
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private const ushort FileFormatVersionMajor = 1;
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private const ushort FileFormatVersionMinor = 2;
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private const uint FileFormatVersionPacked = ((uint)FileFormatVersionMajor << 16) | FileFormatVersionMinor;
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private const uint CodeGenVersion = 13;
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private const uint CodeGenVersion = 14;
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private const string SharedTocFileName = "shared.toc";
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private const string SharedDataFileName = "shared.data";
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@ -234,7 +234,7 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Spirv
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IrOperandType.Constant => GetConstant(type, operand),
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IrOperandType.ConstantBuffer => GetConstantBuffer(type, operand),
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IrOperandType.LocalVariable => GetLocal(type, operand),
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IrOperandType.Undefined => Undef(GetType(type)),
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IrOperandType.Undefined => Constant(GetType(type), 0),
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_ => throw new ArgumentException($"Invalid operand type \"{operand.Type}\".")
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};
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}
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