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vkd3d-shader/ir: Validate that structured CF does not appear in block-based shaders.

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Giovanni Mascellani 2024-01-12 09:28:14 +01:00 committed by Alexandre Julliard
parent 1d45b7a422
commit 17f4afc2b5
Notes: Alexandre Julliard 2024-01-18 23:21:17 +01:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/570
2 changed files with 64 additions and 8 deletions
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70
libs/vkd3d-shader/ir.c
View File

@ -2293,6 +2293,12 @@ 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
{
@ -2613,6 +2619,29 @@ 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];
@ -2644,7 +2673,7 @@ 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;
@ -2660,6 +2689,23 @@ 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:
@ -2675,6 +2721,7 @@ 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)))
@ -2683,6 +2730,7 @@ 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)))
@ -2691,24 +2739,27 @@ 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)))
@ -2717,15 +2768,17 @@ 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)))
@ -2734,15 +2787,17 @@ 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)))
@ -2751,10 +2806,11 @@ 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;
@ -2788,7 +2844,7 @@ 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)
{

2
libs/vkd3d-shader/vkd3d_shader_private.h
View File

@ -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,