Vectors are falling in to the ir_dereference_array() path.
Without this change, the following glsl aborts the debug driver,
or gets the wrong answer in release:
mat2x2 a = mat2( vec2( 1.0, vertex.x ), vec2( 0.0, 1.0 ) );
Also submitting piglit tests, will reference in bug.
v2: Rebase on Mesa master.
v3: Remove unneeded check for arrays, which are covered by
process_array_constructor(), recommended by Timothy Arceri.
Signed-off-by: Cody Northrop <c...@lunarg.com>
Reviewed-by: Courtney Goeltzenleuchter <court...@lunarg.com>
Reviewed-by: Kenneth Graunke <kenn...@whitecape.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79373
---
src/glsl/ast_function.cpp | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/src/glsl/ast_function.cpp b/src/glsl/ast_function.cpp
index cdb34cc..c019b83 100644
--- a/src/glsl/ast_function.cpp
+++ b/src/glsl/ast_function.cpp
@@ -742,11 +742,22 @@ process_vec_mat_constructor(exec_list *instructions,
instructions->push_tail(var);
int i = 0;
+
foreach_in_list(ir_rvalue, rhs, &actual_parameters) {
- ir_rvalue *lhs = new(ctx) ir_dereference_array(var,
- new(ctx) ir_constant(i));
+ ir_instruction *assignment = NULL;
+
+ if (var->type->is_matrix()) {
+ ir_rvalue *lhs = new(ctx) ir_dereference_array(var,
+ new(ctx) ir_constant(i));
+ assignment = new(ctx) ir_assignment(lhs, rhs, NULL);
+ } else {
+ /* use writemask rather than index for vector */
+ assert(var->type->is_vector());
+ assert(i < 4);
+ ir_dereference *lhs = new(ctx) ir_dereference_variable(var);
+ assignment = new(ctx) ir_assignment(lhs, rhs, NULL, (unsigned)(1 <<
i));
+ }
- ir_instruction *assignment = new(ctx) ir_assignment(lhs, rhs, NULL);
instructions->push_tail(assignment);
i++;
--
1.9.1
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