From 9170200a11715d131645d1ffb92e86e6ef0d7e88 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 11 Feb 2021 16:39:06 -0300
Subject: shader: Initial implementation of an AST
---
src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp | 24 ++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
(limited to 'src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp')
diff --git a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
index 15a9db90a9..8ca996e935 100644
--- a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
+++ b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
@@ -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;
--
cgit v1.2.3-70-g09d2