Signed-off-by: Giovanni Mascellani gmascellani@codeweavers.com --- libs/vkd3d-shader/hlsl_codegen.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c index 24b8205c..f8b977b0 100644 --- a/libs/vkd3d-shader/hlsl_codegen.c +++ b/libs/vkd3d-shader/hlsl_codegen.c @@ -475,6 +475,27 @@ static bool fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, voi return true; }
+static bool remove_trivial_swizzles(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context) +{ + struct hlsl_ir_swizzle *swizzle; + unsigned int i; + + if (instr->type != HLSL_IR_SWIZZLE) + return false; + swizzle = hlsl_ir_swizzle(instr); + + if (instr->data_type->dimx != swizzle->val.node->data_type->dimx) + return false; + + for (i = 0; i < instr->data_type->dimx; ++i) + if (((swizzle->swizzle >> (2 * i)) & 3) != i) + return false; + + replace_node(instr, swizzle->val.node); + + return true; +} + /* Lower DIV to RCP + MUL. */ static bool lower_division(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context) { @@ -1355,6 +1376,7 @@ int hlsl_emit_dxbc(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry_fun } while (progress); while (transform_ir(ctx, fold_constants, body, NULL)); + transform_ir(ctx, remove_trivial_swizzles, body, NULL);
if (ctx->profile->major_version < 4) transform_ir(ctx, lower_division, body, NULL);