History prior to this date belonged to the now deprecated ISAAC project, and was deleted to save space

lib/codegen/analysis/liveness.cc

@@ -0,0 +1,57 @@
+#include <climits>
+#include <iostream>
+#include "triton/codegen/analysis/liveness.h"
+#include "triton/codegen/analysis/layout.h"
+#include "triton/ir/function.h"
+#include "triton/ir/module.h"
+#include "triton/ir/utils.h"
+
+namespace triton{
+namespace codegen{
+namespace analysis{
+
+
+void liveness::run(ir::module &mod) {
+  intervals_.clear();
+
+  // Assigns index to each instruction
+  std::map<ir::value*, slot_index> indices;
+  for(ir::function *fn: mod.get_function_list()){
+    slot_index index = 0;
+    for(ir::basic_block *block: fn->blocks())
+    for(ir::instruction *instr: block->get_inst_list()){
+      index += 1;
+      indices.insert({instr, index});
+    }
+  }
+
+  // create live intervals
+  for(auto &x: layouts_->get_all()) {
+    shared_layout* layout = x.second->to_shared();
+    if(!layout)
+      continue;
+    // users
+    std::set<ir::user*> users;
+    for(ir::value *v: layout->get_values()){
+      for(ir::user *u: v->get_users())
+        users.insert(u);
+    }
+    // compute intervals
+    unsigned start = INT32_MAX;
+    for(ir::value *v: layout->get_values())
+      if(indices.find(v) != indices.end())
+        start = std::min(start, indices.at(v));
+    unsigned end = 0;
+    for(ir::user *u: users)
+      if(indices.find(u) != indices.end())
+        end = std::max(end, indices.at(u));
+    intervals_[layout] = segment{start, end};
+  }
+
+
+
+}
+
+}
+}
+}