shader: keep scalar payload and terminal conditions on the GPU

src/graphics/shader/recompiler/ir/passes/ResourceMaterialization.cpp

@@ -741,7 +741,31 @@ static std::vector<ResourceBlock> ResourceControlFlow(const Program& program, co
 		block.sources.erase(std::unique(block.sources.begin(), block.sources.end()),
 		                    block.sources.end());
 	}
-	for (auto& block: blocks) block.condition = predicate(block.condition);
+	// Only branches that can change future resource access belong in the host plan.
+	std::vector<uint8_t> resource_reachable(blocks.size());
+	std::vector<uint32_t> pending;
+	for (uint32_t i = 0; i < blocks.size(); ++i) {
+		if (!blocks[i].sources.empty() || !blocks[i].srt_reads.empty()) {
+			resource_reachable[i] = 1;
+			pending.push_back(i);
+		}
+	}
+	while (!pending.empty()) {
+		const auto index = pending.back();
+		pending.pop_back();
+		for (const auto* predecessor: program.blocks[index]->ImmPredecessors()) {
+			const auto found = indices.find(predecessor);
+			if (found == indices.end()) return {};
+			if (resource_reachable[found->second]) continue;
+			resource_reachable[found->second] = 1;
+			pending.push_back(found->second);
+		}
+	}
+	for (auto& block: blocks) {
+		block.condition = std::ranges::any_of(block.successors, [&](uint32_t successor) {
+			return resource_reachable[successor] != 0;
+		}) ? predicate(block.condition) : Value {};
+	}
 	if (std::ranges::none_of(
 	        blocks, [](const ResourceBlock& block) { return !block.condition.IsEmpty(); })) {
 		return {};