CPU/NewRec: Allocate callee-saved registers before caller-saved
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@ -525,11 +525,20 @@ u32 CPU::NewRec::Compiler::GetFreeHostReg(u32 flags)
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{
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const u32 req_flags = HR_USABLE | (flags & HR_CALLEE_SAVED);
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u32 fallback = NUM_HOST_REGS;
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for (u32 i = 0; i < NUM_HOST_REGS; i++)
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{
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if ((m_host_regs[i].flags & (req_flags | HR_NEEDED | HR_ALLOCATED)) == req_flags)
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{
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// Prefer callee-saved registers.
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if (m_host_regs[i].flags & HR_CALLEE_SAVED)
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return i;
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else if (fallback == NUM_HOST_REGS)
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fallback = i;
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}
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}
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if (fallback != NUM_HOST_REGS)
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return fallback;
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// find register with lowest counter
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u32 lowest = NUM_HOST_REGS;
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