nir: Add a lowering pass to split 64bit phis

[mesa.git] / src / compiler / nir / nir_opt_cse.c

diff --git a/src/compiler/nir/nir_opt_cse.c b/src/compiler/nir/nir_opt_cse.c
index db6bb9a4a22c452e2e0732a9b68654ee1bc1f5b0..e9ca688950101e0673a8b2022ac88fac9e0d12d6 100644 (file)
--- a/src/compiler/nir/nir_opt_cse.c
+++ b/src/compiler/nir/nir_opt_cse.c
@@ -39,9 +39,10 @@
  */
 
 static bool
-cse_block(nir_block *block, struct set *instr_set)
+cse_block(nir_block *block, struct set *dominance_set)
 {
    bool progress = false;
+   struct set *instr_set = _mesa_set_clone(dominance_set, NULL);
 
    nir_foreach_instr_safe(instr, block) {
       if (nir_instr_set_add_or_rewrite(instr_set, instr)) {
@@ -55,8 +56,7 @@ cse_block(nir_block *block, struct set *instr_set)
       progress |= cse_block(child, instr_set);
    }
 
-   nir_foreach_instr(instr, block)
-     nir_instr_set_remove(instr_set, instr);
+   _mesa_set_destroy(instr_set, NULL);
 
    return progress;
 }
@@ -70,9 +70,12 @@ nir_opt_cse_impl(nir_function_impl *impl)
 
    bool progress = cse_block(nir_start_block(impl), instr_set);
 
-   if (progress)
+   if (progress) {
       nir_metadata_preserve(impl, nir_metadata_block_index |
                                   nir_metadata_dominance);
+   } else {
+      nir_metadata_preserve(impl, nir_metadata_all);
+   }
 
    nir_instr_set_destroy(instr_set);
    return progress;