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nir: Don't print swizzles when there are more than 4 components

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... as can happen with various types like mat4, or else we'll smash the
stack writing past the end of components_local[].

Fixes: 5a0d3e1129 ("nir: Print the components referenced for split or
                      packed shader in/outs.")
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Matt Turner
2017-10-27 18:15:46 -07:00
parent 34593e978c
commit 77a63d190a
1 changed files with 1 additions and 1 deletions
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src/compiler/nir/nir_print.c
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@@ -457,7 +457,7 @@ print_var_decl(nir_variable *var, print_state *state)
switch (var->data.mode) { switch (var->data.mode) {
case nir_var_shader_in: case nir_var_shader_in:
case nir_var_shader_out: case nir_var_shader_out:
if (num_components != 4 && num_components != 0) { if (num_components < 4 && num_components != 0) {
const char *xyzw = "xyzw"; const char *xyzw = "xyzw";
for (int i = 0; i < num_components; i++) for (int i = 0; i < num_components; i++)
components_local[i + 1] = xyzw[i + var->data.location_frac]; components_local[i + 1] = xyzw[i + var->data.location_frac];