1 files changed, 26 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/ir/microinstruction.cpp b/src/shader_recompiler/frontend/ir/microinstruction.cpp
index 3dfa5a880..97e2bf6af 100644
--- a/src/shader_recompiler/frontend/ir/microinstruction.cpp
+++ b/src/shader_recompiler/frontend/ir/microinstruction.cpp
@@ -6,6 +6,7 @@
 #include <memory>
 
 #include "shader_recompiler/exception.h"
+#include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/type.h"
 #include "shader_recompiler/frontend/ir/value.h"
 
@@ -46,6 +47,17 @@ Inst::Inst(IR::Opcode op_, u32 flags_) noexcept : op{op_}, flags{flags_} {
     }
 }
 
+Inst::Inst(const Inst& base) : op{base.op}, flags{base.flags} {
+    if (base.op == Opcode::Phi) {
+        throw NotImplementedException("Copying phi node");
+    }
+    std::construct_at(&args);
+    const size_t num_args{base.NumArgs()};
+    for (size_t index = 0; index < num_args; ++index) {
+        SetArg(index, base.Arg(index));
+    }
+}
+
 Inst::~Inst() {
     if (op == Opcode::Phi) {
         std::destroy_at(&phi_args);
@@ -253,6 +265,10 @@ Inst* Inst::GetAssociatedPseudoOperation(IR::Opcode opcode) {
 }
 
 IR::Type Inst::Type() const {
+    if (op == IR::Opcode::Phi) {
+        // The type of a phi node is stored in its flags
+        return Flags<IR::Type>();
+    }
     return TypeOf(op);
 }
 
@@ -291,6 +307,16 @@ void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
     phi_args.emplace_back(predecessor, value);
 }
 
+void Inst::OrderPhiArgs() {
+    if (op != Opcode::Phi) {
+        throw LogicError("{} is not a Phi instruction", op);
+    }
+    std::sort(phi_args.begin(), phi_args.end(),
+              [](const std::pair<Block*, Value>& a, const std::pair<Block*, Value>& b) {
+                  return a.first->GetOrder() < b.first->GetOrder();
+              });
+}
+
 void Inst::Invalidate() {
     ClearArgs();
     ReplaceOpcode(Opcode::Void);