diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/glsl/ast_function.cpp | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/glsl/ast_function.cpp b/src/glsl/ast_function.cpp index 34a82f8ab75..5b6ed3bc8f5 100644 --- a/src/glsl/ast_function.cpp +++ b/src/glsl/ast_function.cpp @@ -199,6 +199,20 @@ match_function_by_name(exec_list *instructions, const char *name, */ ir_call *call = new(ctx) ir_call(sig, actual_parameters); if (!sig->return_type->is_void()) { + /* If the function call is a constant expression, don't + * generate the instructions to call it; just generate an + * ir_constant representing the constant value. + * + * Function calls can only be constant expressions starting + * in GLSL 1.20. + */ + if (state->language_version >= 120) { + ir_constant *const_val = call->constant_expression_value(); + if (const_val) { + return const_val; + } + } + ir_variable *var; ir_dereference_variable *deref; @@ -211,8 +225,6 @@ match_function_by_name(exec_list *instructions, const char *name, deref = new(ctx) ir_dereference_variable(var); ir_assignment *assign = new(ctx) ir_assignment(deref, call, NULL); instructions->push_tail(assign); - if (state->language_version >= 120) - var->constant_value = call->constant_expression_value(); deref = new(ctx) ir_dereference_variable(var); return deref; |