[clang] [CIR] Introduce more cleanup infrastructure (PR #152589)

[Morris Hafner via cfe-commits]

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@@ -70,45 +70,89 @@ void EHScopeStack::deallocate(size_t size) {
 }
 
 void *EHScopeStack::pushCleanup(CleanupKind kind, size_t size) {
-  char *buffer = allocate(size);
+  char *buffer = allocate(EHCleanupScope::getSizeForCleanupSize(size));
 
-  // When the full implementation is upstreamed, this will allocate
-  // extra memory for and construct a wrapper object that is used to
-  // manage the cleanup generation.
-  assert(!cir::MissingFeatures::ehCleanupScope());
+  EHCleanupScope *scope = new (buffer) EHCleanupScope(size);
 
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mmha wrote:

Can you add a `errorNYI("SEH")`?

Note that I just asked the same thing here: https://github.com/llvm/llvm-project/pull/152802#discussion_r2266595757



https://github.com/llvm/llvm-project/pull/152589