nir: Don't print swizzles when there are more than 4 components
... as can happen with various types like mat4, or else we'll smash the
stack writing past the end of components_local[].
Fixes: 5a0d3e1129b7 ("nir: Print the components referenced for split or
packed shader in/outs.")
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
index 4b7ad5c..fcc8025 100644
--- a/src/compiler/nir/nir_print.c
+++ b/src/compiler/nir/nir_print.c
@@ -457,7 +457,7 @@
switch (var->data.mode) {
case nir_var_shader_in:
case nir_var_shader_out:
- if (num_components != 4 && num_components != 0) {
+ if (num_components < 4 && num_components != 0) {
const char *xyzw = "xyzw";
for (int i = 0; i < num_components; i++)
components_local[i + 1] = xyzw[i + var->data.location_frac];