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shader: Move loop safety tests to code emission

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This commit is contained in:
ReinUsesLisp 2021-06-21 01:07:10 -03:00 • committed by ameerj
parent 3877918e96
commit 808ef97a08
16 changed files with 54 additions and 108 deletions
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19
src/shader_recompiler/backend/spirv/emit_spirv.cpp
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@ -8,6 +8,7 @@
#include <utility>
#include <vector>
#include "common/settings.h"
#include "shader_recompiler/backend/spirv/emit_spirv.h"
#include "shader_recompiler/backend/spirv/emit_spirv_instructions.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
@ -151,9 +152,25 @@ void Traverse(EmitContext& ctx, IR::Program& program) {
}
break;
case IR::AbstractSyntaxNode::Type::Repeat: {
Id cond{ctx.Def(node.data.repeat.cond)};
if (!Settings::values.disable_shader_loop_safety_checks) {
const Id pointer_type{ctx.TypePointer(spv::StorageClass::Private, ctx.U32[1])};
const Id safety_counter{ctx.AddGlobalVariable(
pointer_type, spv::StorageClass::Private, ctx.Const(0x2000u))};
if (ctx.profile.supported_spirv >= 0x00010400) {
ctx.interfaces.push_back(safety_counter);
}
const Id old_counter{ctx.OpLoad(ctx.U32[1], safety_counter)};
const Id new_counter{ctx.OpISub(ctx.U32[1], old_counter, ctx.Const(1u))};
ctx.OpStore(safety_counter, new_counter);
const Id safety_cond{
ctx.OpSGreaterThanEqual(ctx.U1, new_counter, ctx.u32_zero_value)};
cond = ctx.OpLogicalAnd(ctx.U1, cond, safety_cond);
}
const Id loop_header_label{node.data.repeat.loop_header->Definition<Id>()};
const Id merge_label{node.data.repeat.merge->Definition<Id>()};
ctx.OpBranchConditional(ctx.Def(node.data.repeat.cond), loop_header_label, merge_label);
ctx.OpBranchConditional(cond, loop_header_label, merge_label);
break;
}
case IR::AbstractSyntaxNode::Type::Return: