diff --git a/src/amd/compiler/aco_ir.h b/src/amd/compiler/aco_ir.h
index 184b4605da9..7d80ad03ae8 100644
--- a/src/amd/compiler/aco_ir.h
+++ b/src/amd/compiler/aco_ir.h
@@ -1633,7 +1633,7 @@ static_assert(sizeof(Export_instruction) == sizeof(Instruction) + 4, "Unexpected
 struct Pseudo_instruction : public Instruction {
    PhysReg scratch_sgpr; /* might not be valid if it's not needed */
    bool tmp_in_scc;
-   uint8_t padding;
+   bool needs_scratch_reg; /* if scratch_sgpr/scc can be written, initialized by RA. */
 };
 static_assert(sizeof(Pseudo_instruction) == sizeof(Instruction) + 4, "Unexpected padding");
 
diff --git a/src/amd/compiler/aco_register_allocation.cpp b/src/amd/compiler/aco_register_allocation.cpp
index 9c06c84674c..d5933b1bee7 100644
--- a/src/amd/compiler/aco_register_allocation.cpp
+++ b/src/amd/compiler/aco_register_allocation.cpp
@@ -1913,6 +1913,7 @@ handle_pseudo(ra_ctx& ctx, const RegisterFile& reg_file, Instruction* instr)
    if (!needs_scratch_reg)
       return;
 
+   instr->pseudo().needs_scratch_reg = true;
    instr->pseudo().tmp_in_scc = reg_file[scc];
 
    int reg = ctx.max_used_sgpr;
@@ -3067,6 +3068,7 @@ register_allocation(Program* program, std::vector<IDSet>& live_out_per_block, ra
 
                handle_pseudo(ctx, tmp_file, pc.get());
             } else {
+               pc->needs_scratch_reg = sgpr_operands_alias_defs || linear_vgpr;
                pc->tmp_in_scc = false;
             }
 
diff --git a/src/amd/compiler/aco_ssa_elimination.cpp b/src/amd/compiler/aco_ssa_elimination.cpp
index 729449fcf7f..8229001168d 100644
--- a/src/amd/compiler/aco_ssa_elimination.cpp
+++ b/src/amd/compiler/aco_ssa_elimination.cpp
@@ -133,6 +133,7 @@ insert_parallelcopies(ssa_elimination_ctx& ctx)
       }
       pc->tmp_in_scc = block.scc_live_out;
       pc->scratch_sgpr = scratch_sgpr;
+      pc->needs_scratch_reg = true;
       block.instructions.insert(it, std::move(pc));
    }
 }