Respect per-target debug options (#6193)

* Base compiler options for targets on target-specific compiler options

Before this change, the target compiler options were based on the linkage-wide compiler
options, which where later again inherited from (basically a no-op).

With this change, the target-specific compiler options are added first, and then
the linkage-wide comnpiler options are inherited from.

* Remove debug instructions if target-specific setting is NONE

This helps to address #6092.

* Make sure the linkage debug info level is sufficient for each target

This closes #6092.

1 files changed, 33 insertions, 0 deletions

diff --git a/source/slang/slang-ir-strip-debug-info.cpp b/source/slang/slang-ir-strip-debug-info.cpp
new file mode 100644
index 000000000..8b2a07663
--- /dev/null
+++ b/source/slang/slang-ir-strip-debug-info.cpp
@@ -0,0 +1,33 @@
+#include "slang-ir-strip-debug-info.h"
+
+#include "slang-ir-insts.h"
+
+namespace Slang
+{
+static void findDebugInfo(IRInst* inst, List<IRInst*>& debugInstructions)
+{
+    switch (inst->getOp())
+    {
+    case kIROp_DebugValue:
+    case kIROp_DebugVar:
+    case kIROp_DebugLine:
+    case kIROp_DebugLocationDecoration:
+    case kIROp_DebugSource:
+        debugInstructions.add(inst);
+        break;
+    default:
+        break;
+    }
+
+    for (auto child : inst->getChildren())
+        findDebugInfo(child, debugInstructions);
+}
+
+void stripDebugInfo(IRModule* irModule)
+{
+    List<IRInst*> debugInstructions;
+    findDebugInfo(irModule->getModuleInst(), debugInstructions);
+    for (auto debugInst : debugInstructions)
+        debugInst->removeAndDeallocate();
+}
+} // namespace Slang