[clang] [CIR] Emit lifetime markers for automatic variables (PR #206695)

[Sirui Mu via cfe-commits]

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@@ -28,10 +28,30 @@
 
 namespace clang::CIRGen {
 
+/// shouldEmitLifetimeMarkers - Decide whether we need emit the life-time
+/// markers. Mirror of CodeGenFunction::shouldEmitLifetimeMarkers.
+static bool shouldEmitLifetimeMarkers(const CodeGenOptions &cgOpts,
+                                      const LangOptions &langOpts) {
+
+  if (cgOpts.DisableLifetimeMarkers)
+    return false;
+
+  // Sanitizers may use markers.
+  if (cgOpts.SanitizeAddressUseAfterScope ||
+      langOpts.Sanitize.has(SanitizerKind::HWAddress) ||
+      langOpts.Sanitize.has(SanitizerKind::Memory) ||
+      langOpts.Sanitize.has(SanitizerKind::MemtagStack))
+    return true;
+
+  return cgOpts.OptimizationLevel != 0;
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Lancern wrote:

Could you add a lit test that verifies no lifetime markers are emitted under `-O0`?

https://github.com/llvm/llvm-project/pull/206695