dead_code_elimination_pass: Remove unreachable Phi arguments

1 files changed, 5 insertions, 0 deletions

diff --git a/src/shader_recompiler/frontend/ir/microinstruction.cpp b/src/shader_recompiler/frontend/ir/microinstruction.cpp
index 631446cf7..4a2564f47 100644
--- a/src/shader_recompiler/frontend/ir/microinstruction.cpp
+++ b/src/shader_recompiler/frontend/ir/microinstruction.cpp
@@ -326,6 +326,11 @@ void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
     phi_args.emplace_back(predecessor, value);
 }
 
+void Inst::ErasePhiOperand(size_t index) {
+    const auto operand_it{phi_args.begin() + static_cast<ptrdiff_t>(index)};
+    phi_args.erase(operand_it);
+}
+
 void Inst::OrderPhiArgs() {
     if (op != Opcode::Phi) {
         throw LogicError("{} is not a Phi instruction", op);