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Shader: Assume the only remaining source is the right one when all other are undefined

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gdkchan 2024-09-19 16:18:40 -03:00
commit 1428bda96c
1 changed files with 22 additions and 0 deletions
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src/Ryujinx.Graphics.Shader/Translation/Optimizations/Utils.cs
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@ -138,6 +138,8 @@ namespace Ryujinx.Graphics.Shader.Translation.Optimizations
// Ensure that conditions met for that branch are also met for the current one. // Ensure that conditions met for that branch are also met for the current one.
// Prefer the latest sources for the phi node. // Prefer the latest sources for the phi node.
int undefCount = 0;
for (int i = phiNode.SourcesCount - 1; i >= 0; i--) for (int i = phiNode.SourcesCount - 1; i >= 0; i--)
{ {
BasicBlock phiBlock = phiNode.GetBlock(i); BasicBlock phiBlock = phiNode.GetBlock(i);
@ -159,6 +161,26 @@ namespace Ryujinx.Graphics.Shader.Translation.Optimizations
return match; return match;
} }
} }
else if (phiSource.Type == OperandType.Undefined)
{
undefCount++;
}
}
// If all sources but one are all undefined, we can assume that the one
// that is not undefined is the right one.
if (undefCount == phiNode.SourcesCount - 1)
{
for (int i = phiNode.SourcesCount - 1; i >= 0; i--)
{
Operand phiSource = phiNode.GetSource(i);
if (phiSource.Type != OperandType.Undefined)
{
return phiSource;
}
}
} }
} }