Preliminary Liveness tracking (#2218)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP tracking liveness.

* Skeleton around adding liveness instructions.

* Calling into liveness tracking logic.
Adds live start to var insts.

* Liveness macros have initial output.

* Looking at different initialization scenarios.

* Some discussion around liveness.

* WIP for working out liveness end.

* WIP Updated liveness using use lists.

* Is now adding liveness information

* Some small fixes.

* WIP around liveness.

* Seems to output liveness correctly for current scenario.

* Tidy up liveness code.

* Update comment arounds liveness to current status.

* Small fixes to liveness test.

* Add support for call in liveness analysis.

* Improve liveness example with array access.

* Small updates to comments.

* Disable liveness test because inconsistencies with output on CI system.

* Fix some issues brought up in PR.

* Rename liveness instructions.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/slang/slang.cpp b/source/slang/slang.cpp
index 985599022..3a180027a 100644
--- a/source/slang/slang.cpp
+++ b/source/slang/slang.cpp
@@ -4159,6 +4159,18 @@ void EndToEndCompileRequest::setDumpIntermediates(int enable)
     }
 }
 
+void EndToEndCompileRequest::setTrackLiveness(bool v)
+{
+    enableLivenessTracking = v;
+
+    // Change all existing targets to use the new setting.
+    auto linkage = getLinkage();
+    for (auto& target : linkage->targets)
+    {
+        target->setTrackLiveness(v);
+    }
+}
+
 void EndToEndCompileRequest::setDumpIntermediatePrefix(const char* prefix)
 {
     m_dumpIntermediatePrefix = prefix;