From: Giovanni Mascellani gmascellani@codeweavers.com
--- libs/vkd3d-shader/ir.c | 70 +++++++++++++++++++++--- libs/vkd3d-shader/vkd3d_shader_private.h | 2 +- 2 files changed, 64 insertions(+), 8 deletions(-)
diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c index e444dda04..b842d1222 100644 --- a/libs/vkd3d-shader/ir.c +++ b/libs/vkd3d-shader/ir.c @@ -2221,6 +2221,12 @@ struct validation_context bool dcl_temps_found; unsigned int temp_count; enum vkd3d_shader_opcode phase; + enum cf_type + { + CF_TYPE_UNKNOWN = 0, + CF_TYPE_STRUCTURED, + CF_TYPE_BLOCKS, + } cf_type;
struct validation_context_temp_data { @@ -2541,6 +2547,29 @@ static void vsir_validate_src_count(struct validation_context *ctx, instruction->src_count, instruction->handler_idx, count); }
+static const char *name_from_cf_type(enum cf_type type) +{ + switch (type) + { + case CF_TYPE_STRUCTURED: + return "structured"; + case CF_TYPE_BLOCKS: + return "block-based"; + default: + vkd3d_unreachable(); + } +} + +static void vsir_validate_cf_type(struct validation_context *ctx, + const struct vkd3d_shader_instruction *instruction, enum cf_type expected_type) +{ + assert(ctx->cf_type != CF_TYPE_UNKNOWN); + assert(expected_type != CF_TYPE_UNKNOWN); + if (ctx->cf_type != expected_type) + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "Invalid instruction %#x in %s shader.", + instruction->handler_idx, name_from_cf_type(ctx->cf_type)); +} + static void vsir_validate_instruction(struct validation_context *ctx) { const struct vkd3d_shader_instruction *instruction = &ctx->parser->instructions.elements[ctx->instruction_idx]; @@ -2572,7 +2601,7 @@ static void vsir_validate_instruction(struct validation_context *ctx) validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_HANDLER, "Phase instruction %#x is only valid in a hull shader.", instruction->handler_idx); if (ctx->depth != 0) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "Phase instruction %#x must appear to top level.", + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "Phase instruction %#x must appear to top level.", instruction->handler_idx); ctx->phase = instruction->handler_idx; ctx->dcl_temps_found = false; @@ -2588,6 +2617,23 @@ static void vsir_validate_instruction(struct validation_context *ctx) validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_HANDLER, "Instruction %#x appear before any phase instruction in a hull shader.", instruction->handler_idx);
+ /* We support two different control flow types in shaders: + * block-based, like DXIL and SPIR-V, and structured, like D3DBC + * and TPF. The shader is detected as block-based when its first + * instruction, except for DCL_* and phases, is a LABEL. Currently + * we mandate that each shader is either purely block-based or + * purely structured. In principle we could allow structured + * constructs in a block, provided they are confined in a single + * block, but need for that hasn't arisen yet, so we don't. */ + if (ctx->cf_type == CF_TYPE_UNKNOWN && !(instruction->handler_idx >= VKD3DSIH_DCL + && instruction->handler_idx <= VKD3DSIH_DCL_VERTICES_OUT)) + { + if (instruction->handler_idx == VKD3DSIH_LABEL) + ctx->cf_type = CF_TYPE_BLOCKS; + else + ctx->cf_type = CF_TYPE_STRUCTURED; + } + switch (instruction->handler_idx) { case VKD3DSIH_DCL_TEMPS: @@ -2603,6 +2649,7 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_IF: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 1); if (!vkd3d_array_reserve((void **)&ctx->blocks, &ctx->blocks_capacity, ctx->depth + 1, sizeof(*ctx->blocks))) @@ -2611,6 +2658,7 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_IFC: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 2); if (!vkd3d_array_reserve((void **)&ctx->blocks, &ctx->blocks_capacity, ctx->depth + 1, sizeof(*ctx->blocks))) @@ -2619,24 +2667,27 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_ELSE: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 0); if (ctx->depth == 0 || ctx->blocks[ctx->depth - 1] != VKD3DSIH_IF) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "ELSE instruction doesn't terminate IF block."); + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "ELSE instruction doesn't terminate IF block."); else ctx->blocks[ctx->depth - 1] = instruction->handler_idx; break;
case VKD3DSIH_ENDIF: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 0); if (ctx->depth == 0 || (ctx->blocks[ctx->depth - 1] != VKD3DSIH_IF && ctx->blocks[ctx->depth - 1] != VKD3DSIH_ELSE)) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "ENDIF instruction doesn't terminate IF/ELSE block."); + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "ENDIF instruction doesn't terminate IF/ELSE block."); else --ctx->depth; break;
case VKD3DSIH_LOOP: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, ctx->parser->shader_version.major <= 3 ? 2 : 0); if (!vkd3d_array_reserve((void **)&ctx->blocks, &ctx->blocks_capacity, ctx->depth + 1, sizeof(*ctx->blocks))) @@ -2645,15 +2696,17 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_ENDLOOP: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 0); if (ctx->depth == 0 || ctx->blocks[ctx->depth - 1] != VKD3DSIH_LOOP) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "ENDLOOP instruction doesn't terminate LOOP block."); + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "ENDLOOP instruction doesn't terminate LOOP block."); else --ctx->depth; break;
case VKD3DSIH_REP: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 1); if (!vkd3d_array_reserve((void **)&ctx->blocks, &ctx->blocks_capacity, ctx->depth + 1, sizeof(*ctx->blocks))) @@ -2662,15 +2715,17 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_ENDREP: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 0); if (ctx->depth == 0 || ctx->blocks[ctx->depth - 1] != VKD3DSIH_REP) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "ENDREP instruction doesn't terminate REP block."); + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "ENDREP instruction doesn't terminate REP block."); else --ctx->depth; break;
case VKD3DSIH_SWITCH: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 1); if (!vkd3d_array_reserve((void **)&ctx->blocks, &ctx->blocks_capacity, ctx->depth + 1, sizeof(*ctx->blocks))) @@ -2679,10 +2734,11 @@ static void vsir_validate_instruction(struct validation_context *ctx) break;
case VKD3DSIH_ENDSWITCH: + vsir_validate_cf_type(ctx, instruction, CF_TYPE_STRUCTURED); vsir_validate_dst_count(ctx, instruction, 0); vsir_validate_src_count(ctx, instruction, 0); if (ctx->depth == 0 || ctx->blocks[ctx->depth - 1] != VKD3DSIH_SWITCH) - validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "ENDSWITCH instruction doesn't terminate SWITCH block."); + validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "ENDSWITCH instruction doesn't terminate SWITCH block."); else --ctx->depth; break; @@ -2716,7 +2772,7 @@ enum vkd3d_result vsir_validate(struct vkd3d_shader_parser *parser) ctx.invalid_instruction_idx = true;
if (ctx.depth != 0) - validator_error(&ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING, "%zu nested blocks were not closed.", ctx.depth); + validator_error(&ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW, "%zu nested blocks were not closed.", ctx.depth);
for (i = 0; i < parser->shader_desc.ssa_count; ++i) { diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h index 5588a64d5..8d52c3efd 100644 --- a/libs/vkd3d-shader/vkd3d_shader_private.h +++ b/libs/vkd3d-shader/vkd3d_shader_private.h @@ -215,7 +215,7 @@ enum vkd3d_shader_error VKD3D_SHADER_ERROR_VSIR_DUPLICATE_DCL_TEMPS = 9013, VKD3D_SHADER_ERROR_VSIR_INVALID_DCL_TEMPS = 9014, VKD3D_SHADER_ERROR_VSIR_INVALID_INDEX = 9015, - VKD3D_SHADER_ERROR_VSIR_INVALID_INSTRUCTION_NESTING = 9016, + VKD3D_SHADER_ERROR_VSIR_INVALID_CONTROL_FLOW = 9016, VKD3D_SHADER_ERROR_VSIR_INVALID_SSA_USAGE = 9017,
VKD3D_SHADER_WARNING_VSIR_DYNAMIC_DESCRIPTOR_ARRAY = 9300,