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shader: validate shared terminal paths in selections

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This commit is contained in:
nmzik
2026-09-07 06:57:55 +04:00
parent 6cc9e5de11
commit 19fc0274de
2 changed files with 36 additions and 8 deletions
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src/graphics/shader/recompiler/frontend/cfg/ShaderCFG.cpp
+3 -8
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@@ -1454,24 +1454,19 @@ std::vector<uint32_t> SelectionRegion(const Graph& graph, const BasicBlock& head
std::vector<uint32_t> region;
std::vector<uint32_t> pending = {header.terminator.true_block, header.terminator.false_block};
const auto* loop = FindInnermostContainingLoop(graph, header.id);
const auto global_merge = graph.FindNearestCommonPostDominator(header.terminator.true_block,
header.terminator.false_block);
while (!pending.empty()) {
const auto block_id = pending.back();
pending.pop_back();
if (block_id == merge || Contains(region, block_id) ||
(loop != nullptr && (block_id == loop->merge || block_id == loop->continue_block)) ||
IsEnclosingLinearExit(graph, header.id, block_id) ||
(block_id == global_merge && HasLinearPathToTerminal(graph, block_id))) {
(loop != nullptr && (block_id == loop->merge || block_id == loop->continue_block))) {
continue;
}
const auto* block = graph.FindBlock(block_id);
if (block == nullptr) {
continue;
}
if (block->successors.empty()) {
continue;
}
// A return terminates its own block; a branch to a shared return still has to
// obey selection entry/exit rules, just like any other branch.
AddUnique(region, block_id);
pending.insert(pending.end(), block->successors.begin(), block->successors.end());
}