From 1b0cf2309c760c1cb97a230a1572f8e87f84444a Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 14 Feb 2021 22:46:40 -0300
Subject: shader: Add support for forward declarations

---
 src/shader_recompiler/backend/spirv/emit_spirv.h | 40 +-----------------------
 1 file changed, 1 insertion(+), 39 deletions(-)

(limited to 'src/shader_recompiler/backend/spirv/emit_spirv.h')

diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.h b/src/shader_recompiler/backend/spirv/emit_spirv.h
index 6b09757d1..7d76377b5 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.h
@@ -6,8 +6,6 @@
 
 #include <sirit/sirit.h>
 
-#include <boost/container/flat_map.hpp>
-
 #include "common/common_types.h"
 #include "shader_recompiler/frontend/ir/microinstruction.h"
 #include "shader_recompiler/frontend/ir/program.h"
@@ -16,37 +14,6 @@ namespace Shader::Backend::SPIRV {
 
 using Sirit::Id;
 
-class DefMap {
-public:
-    void Define(IR::Inst* inst, Id def_id) {
-        const InstInfo info{.use_count{inst->UseCount()}, .def_id{def_id}};
-        const auto it{map.insert(map.end(), std::make_pair(inst, info))};
-        if (it == map.end()) {
-            throw LogicError("Defining already defined instruction");
-        }
-    }
-
-    [[nodiscard]] Id Consume(IR::Inst* inst) {
-        const auto it{map.find(inst)};
-        if (it == map.end()) {
-            throw LogicError("Consuming undefined instruction");
-        }
-        const Id def_id{it->second.def_id};
-        if (--it->second.use_count == 0) {
-            map.erase(it);
-        }
-        return def_id;
-    }
-
-private:
-    struct InstInfo {
-        int use_count;
-        Id def_id;
-    };
-
-    boost::container::flat_map<IR::Inst*, InstInfo> map;
-};
-
 class VectorTypes {
 public:
     void Define(Sirit::Module& sirit_ctx, Id base_type, std::string_view name) {
@@ -76,7 +43,7 @@ public:
 
     [[nodiscard]] Id Def(const IR::Value& value) {
         if (!value.IsImmediate()) {
-            return def_map.Consume(value.Inst());
+            return value.Inst()->Definition<Id>();
         }
         switch (value.Type()) {
         case IR::Type::U1:
@@ -90,10 +57,6 @@ public:
         }
     }
 
-    void Define(IR::Inst* inst, Id def_id) {
-        def_map.Define(inst, def_id);
-    }
-
     [[nodiscard]] Id BlockLabel(IR::Block* block) const {
         const auto it{std::ranges::lower_bound(block_label_map, block, {},
                                                &std::pair<IR::Block*, Id>::first)};
@@ -117,7 +80,6 @@ public:
     Id local_invocation_id{};
 
 private:
-    DefMap def_map;
     std::vector<std::pair<IR::Block*, Id>> block_label_map;
 };
 
-- 
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