gate codegen to allow normal builds to skip densemap lookup

Author: SwayamInSync

clang/lib/CodeGen/CodeGenModule.cpp

@@ -4174,6 +4174,19 @@ void CodeGenModule::EmitGlobal(GlobalDecl GD) {
   if (Global->hasAttr<WeakRefAttr>())
     return;
 
+  // CppVerify: spec and proof functions are ghost — never emit IR for them.
+  // This must be checked before alias/ifunc/cpu_dispatch paths so that a
+  // ghost function carrying any of those attributes is still suppressed.
+  if (LangOpts.VerifyContracts) {
+    if (const auto *FD = dyn_cast<FunctionDecl>(Global)) {
+      if (const FunctionContractInfo *CI =
+              getContext().getFunctionContract(FD)) {
+        if (CI->IsSpec || CI->IsProof)
+          return;
+      }
+    }
+  }
+
   // If this is an alias definition (which otherwise looks like a declaration)
   // emit it now.
   if (Global->hasAttr<AliasAttr>()) {
@@ -4235,12 +4248,6 @@ void CodeGenModule::EmitGlobal(GlobalDecl GD) {
 
   // Ignore declarations, they will be emitted on their first use.
   if (const auto *FD = dyn_cast<FunctionDecl>(Global)) {
-    // CppVerify: spec and proof functions are ghost — never emit IR for them.
-    if (const FunctionContractInfo *CI = getContext().getFunctionContract(FD)) {
-      if (CI->IsSpec || CI->IsProof)
-        return;
-    }
-
     if (DeviceKernelAttr::isOpenCLSpelling(FD->getAttr<DeviceKernelAttr>()) &&
         FD->doesThisDeclarationHaveABody())
       addDeferredDeclToEmit(GlobalDecl(FD, KernelReferenceKind::Stub));