shader: Remove invalidated blocks in dead code elimination pass
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@ -14,9 +14,12 @@ void DeadCodeEliminationPass(IR::Program& program) {
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// We iterate over the instructions in reverse order.
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// We iterate over the instructions in reverse order.
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// This is because removing an instruction reduces the number of uses for earlier instructions.
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// This is because removing an instruction reduces the number of uses for earlier instructions.
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for (IR::Block* const block : program.post_order_blocks) {
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for (IR::Block* const block : program.post_order_blocks) {
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for (IR::Inst& inst : block->Instructions() | std::views::reverse) {
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auto it{block->end()};
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if (!inst.HasUses() && !inst.MayHaveSideEffects()) {
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while (it != block->begin()) {
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inst.Invalidate();
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--it;
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if (!it->HasUses() && !it->MayHaveSideEffects()) {
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it->Invalidate();
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it = block->Instructions().erase(it);
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}
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}
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}
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}
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}
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}
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