[Mesa-dev] [PATCH 06/23] nir: Return progress from nir_lower_64bit_pack().

[Matt Turner]

---
 src/compiler/nir/nir.h                     |  2 +-
 src/compiler/nir/nir_lower_64bit_packing.c | 14 +++++++++++---
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index ac18d58..5e7da27 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2567,7 +2567,7 @@ typedef enum {
 } nir_lower_doubles_options;
 
 bool nir_lower_doubles(nir_shader *shader, nir_lower_doubles_options options);
-void nir_lower_64bit_pack(nir_shader *shader);
+bool nir_lower_64bit_pack(nir_shader *shader);
 
 bool nir_normalize_cubemap_coords(nir_shader *shader);
 
diff --git a/src/compiler/nir/nir_lower_64bit_packing.c b/src/compiler/nir/nir_lower_64bit_packing.c
index f523ceb..ad0911a 100644
--- a/src/compiler/nir/nir_lower_64bit_packing.c
+++ b/src/compiler/nir/nir_lower_64bit_packing.c
@@ -48,11 +48,12 @@ lower_unpack_64(nir_builder *b, nir_ssa_def *src)
                       nir_unpack_64_2x32_split_y(b, src));
 }
 
-static void
+static bool
 lower_64bit_pack_impl(nir_function_impl *impl)
 {
    nir_builder b;
    nir_builder_init(&b, impl);
+   bool progress = false;
 
    nir_foreach_block(block, impl) {
       nir_foreach_instr_safe(instr, block) {
@@ -83,15 +84,22 @@ lower_64bit_pack_impl(nir_function_impl *impl)
 
          nir_ssa_def_rewrite_uses(&alu_instr->dest.dest.ssa, nir_src_for_ssa(dest));
          nir_instr_remove(&alu_instr->instr);
+         progress = true;
       }
    }
+
+   return progress;
 }
 
-void
+bool
 nir_lower_64bit_pack(nir_shader *shader)
 {
+   bool progress = false;
+
    nir_foreach_function(function, shader) {
       if (function->impl)
-         lower_64bit_pack_impl(function->impl);
+         progress |= lower_64bit_pack_impl(function->impl);
    }
+
+   return false;
 }
-- 
2.10.2