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shader: Initial implementation of an AST

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This commit is contained in:
ReinUsesLisp 2021-02-11 16:39:06 -03:00 • committed by ameerj
parent 2930dccecc
commit 9170200a11
33 changed files with 1347 additions and 591 deletions
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24
src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
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@ -34,6 +34,13 @@ struct SignFlagTag : FlagTag {};
struct CarryFlagTag : FlagTag {};
struct OverflowFlagTag : FlagTag {};
struct GotoVariable : FlagTag {
GotoVariable() = default;
explicit GotoVariable(u32 index_) : index{index_} {}
u32 index;
};
struct DefTable {
[[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept {
return regs[IR::RegIndex(variable)];
@ -43,6 +50,10 @@ struct DefTable {
return preds[IR::PredIndex(variable)];
}
[[nodiscard]] ValueMap& operator[](GotoVariable goto_variable) {
return goto_vars[goto_variable.index];
}
[[nodiscard]] ValueMap& operator[](ZeroFlagTag) noexcept {
return zero_flag;
}
@ -61,6 +72,7 @@ struct DefTable {
std::array<ValueMap, IR::NUM_USER_REGS> regs;
std::array<ValueMap, IR::NUM_USER_PREDS> preds;
boost::container::flat_map<u32, ValueMap> goto_vars;
ValueMap zero_flag;
ValueMap sign_flag;
ValueMap carry_flag;
@ -68,15 +80,15 @@ struct DefTable {
};
IR::Opcode UndefOpcode(IR::Reg) noexcept {
return IR::Opcode::Undef32;
return IR::Opcode::UndefU32;
}
IR::Opcode UndefOpcode(IR::Pred) noexcept {
return IR::Opcode::Undef1;
return IR::Opcode::UndefU1;
}
IR::Opcode UndefOpcode(const FlagTag&) noexcept {
return IR::Opcode::Undef1;
return IR::Opcode::UndefU1;
}
[[nodiscard]] bool IsPhi(const IR::Inst& inst) noexcept {
@ -165,6 +177,9 @@ void SsaRewritePass(IR::Function& function) {
pass.WriteVariable(pred, block, inst.Arg(1));
}
break;
case IR::Opcode::SetGotoVariable:
pass.WriteVariable(GotoVariable{inst.Arg(0).U32()}, block, inst.Arg(1));
break;
case IR::Opcode::SetZFlag:
pass.WriteVariable(ZeroFlagTag{}, block, inst.Arg(0));
break;
@ -187,6 +202,9 @@ void SsaRewritePass(IR::Function& function) {
inst.ReplaceUsesWith(pass.ReadVariable(pred, block));
}
break;
case IR::Opcode::GetGotoVariable:
inst.ReplaceUsesWith(pass.ReadVariable(GotoVariable{inst.Arg(0).U32()}, block));
break;
case IR::Opcode::GetZFlag:
inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block));
break;