aco: keep track of temporaries' regclasses in the Program

A future change will switch the liveness sets to bit vectors, which don't
contain regclass information.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6733>

src/amd/compiler/aco_instruction_selection_setup.cpp

@@ -1152,7 +1152,7 @@ void init_context(isel_context *ctx, nir_shader *shader)
    ctx->program->config->spi_ps_input_addr = spi_ps_inputs;
 
    for (unsigned i = 0; i < impl->ssa_alloc; i++)
-      allocated[i] = Temp(ctx->program->allocateId(), allocated[i].regClass());
+      allocated[i] = ctx->program->allocateTmp(allocated[i].regClass());
 
    ctx->allocated.reset(allocated.release());
    ctx->cf_info.nir_to_aco.reset(nir_to_aco.release());