[clang] [Clang] Initialize bypassed variables w/ trivial-auto-var-init (PR #181937)

[Justin Stitt via cfe-commits]

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@@ -1833,6 +1864,33 @@ bool CodeGenFunction::isTrivialInitializer(const Expr *Init) {
   return false;
 }
 
+LangOptions::TrivialAutoVarInitKind
+CodeGenFunction::getAutoVarInitKind(QualType type, const VarDecl &D) {
+  auto hasNoTrivialAutoVarInitAttr = [](const Decl *D) {
+    return D && D->hasAttr<NoTrivialAutoVarInitAttr>();
+  };
+  if (D.isConstexpr() || D.getAttr<UninitializedAttr>() ||
+      hasNoTrivialAutoVarInitAttr(type->getAsTagDecl()) ||
+      hasNoTrivialAutoVarInitAttr(CurFuncDecl))
+    return LangOptions::TrivialAutoVarInitKind::Uninitialized;
+  return getContext().getLangOpts().getTrivialAutoVarInit();
+}
+
+void CodeGenFunction::emitBypassedVarInitsForSource(const Stmt *Source) {
+  const auto *Vars = Bypasses.getBypassedVarsForSource(Source);
+  if (!Vars)
+    return;
+  for (const VarDecl *VD : *Vars) {
+    for (const auto &[D, Addr] : BypassedVarInits) {
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JustinStitt wrote:

Ah I meant to go back and fix this. The brute force was what I implemented to begin with but I think we really want `DenseMap` lookup here.

https://github.com/llvm/llvm-project/pull/181937