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glasm: Rework control flow introducing a syntax list

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This commit regresses VertexA shaders, their transformation pass has to
be adapted to the new control flow.
This commit is contained in:
ReinUsesLisp 2021-05-14 00:40:54 -03:00 • committed by ameerj
parent 7ff5851608
commit d54d7de40e
33 changed files with 437 additions and 505 deletions
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71
src/shader_recompiler/backend/spirv/emit_spirv.cpp
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@ -41,8 +41,6 @@ ArgType Arg(EmitContext& ctx, const IR::Value& arg) {
return arg;
} else if constexpr (std::is_same_v<ArgType, u32>) {
return arg.U32();
} else if constexpr (std::is_same_v<ArgType, IR::Block*>) {
return arg.Label();
} else if constexpr (std::is_same_v<ArgType, IR::Attribute>) {
return arg.Attribute();
} else if constexpr (std::is_same_v<ArgType, IR::Patch>) {
@ -109,15 +107,74 @@ Id TypeId(const EmitContext& ctx, IR::Type type) {
}
}
void Traverse(EmitContext& ctx, IR::Program& program) {
IR::Block* current_block{};
for (const IR::AbstractSyntaxNode& node : program.syntax_list) {
switch (node.type) {
case IR::AbstractSyntaxNode::Type::Block:
const Id label{node.block->Definition<Id>()};
if (current_block) {
ctx.OpBranch(label);
}
current_block = node.block;
ctx.AddLabel(label);
for (IR::Inst& inst : node.block->Instructions()) {
EmitInst(ctx, &inst);
}
break;
case IR::AbstractSyntaxNode::Type::If: {
const Id if_label{node.if_node.body->Definition<Id>()};
const Id endif_label{node.if_node.merge->Definition<Id>()};
ctx.OpSelectionMerge(endif_label, spv::SelectionControlMask::MaskNone);
ctx.OpBranchConditional(ctx.Def(node.if_node.cond), if_label, endif_label);
break;
}
case IR::AbstractSyntaxNode::Type::Loop: {
const Id body_label{node.loop.body->Definition<Id>()};
const Id continue_label{node.loop.continue_block->Definition<Id>()};
const Id endloop_label{node.loop.merge->Definition<Id>()};
ctx.OpLoopMerge(endloop_label, continue_label, spv::LoopControlMask::MaskNone);
ctx.OpBranch(node.loop.body->Definition<Id>());
break;
}
case IR::AbstractSyntaxNode::Type::Break: {
const Id break_label{node.break_node.merge->Definition<Id>()};
const Id skip_label{node.break_node.skip->Definition<Id>()};
ctx.OpBranchConditional(ctx.Def(node.break_node.cond), break_label, skip_label);
break;
}
case IR::AbstractSyntaxNode::Type::EndIf:
if (current_block) {
ctx.OpBranch(node.end_if.merge->Definition<Id>());
}
break;
case IR::AbstractSyntaxNode::Type::Repeat: {
const Id loop_header_label{node.repeat.loop_header->Definition<Id>()};
const Id merge_label{node.repeat.merge->Definition<Id>()};
ctx.OpBranchConditional(ctx.Def(node.repeat.cond), loop_header_label, merge_label);
break;
}
case IR::AbstractSyntaxNode::Type::Return:
ctx.OpReturn();
break;
case IR::AbstractSyntaxNode::Type::Unreachable:
ctx.OpUnreachable();
break;
}
if (node.type != IR::AbstractSyntaxNode::Type::Block) {
current_block = nullptr;
}
}
}
Id DefineMain(EmitContext& ctx, IR::Program& program) {
const Id void_function{ctx.TypeFunction(ctx.void_id)};
const Id main{ctx.OpFunction(ctx.void_id, spv::FunctionControlMask::MaskNone, void_function)};
for (IR::Block* const block : program.blocks) {
ctx.AddLabel(block->Definition<Id>());
for (IR::Inst& inst : block->Instructions()) {
EmitInst(ctx, &inst);
}
block->SetDefinition(ctx.OpLabel());
}
Traverse(ctx, program);
ctx.OpFunctionEnd();
return main;
}
@ -411,6 +468,8 @@ Id EmitIdentity(EmitContext& ctx, const IR::Value& value) {
return id;
}
void EmitBranchConditionRef(EmitContext&) {}
void EmitGetZeroFromOp(EmitContext&) {
throw LogicError("Unreachable instruction");
}