nir: Always print non-identity swizzles.

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

diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
index 3beb70a75d31ee71b76af40a1af207805135dbf8..9fa024ea783c55ec9d5b1a4d031b233ebfb61220 100644 (file)
--- a/src/compiler/nir/nir_print.c
+++ b/src/compiler/nir/nir_print.c
@@ -186,17 +186,25 @@ print_alu_src(nir_alu_instr *instr, unsigned src, print_state *state)
    print_src(&instr->src[src].src, state);
 
    bool print_swizzle = false;
+   unsigned used_channels = 0;
+
    for (unsigned i = 0; i < 4; i++) {
       if (!nir_alu_instr_channel_used(instr, src, i))
          continue;
 
+      used_channels++;
+
       if (instr->src[src].swizzle[i] != i) {
          print_swizzle = true;
          break;
       }
    }
 
-   if (print_swizzle) {
+   unsigned live_channels = instr->src[src].src.is_ssa
+      ? instr->src[src].src.ssa->num_components
+      : instr->src[src].src.reg.reg->num_components;
+
+   if (print_swizzle || used_channels != live_channels) {
       fprintf(fp, ".");
       for (unsigned i = 0; i < 4; i++) {
          if (!nir_alu_instr_channel_used(instr, src, i))