================
@@ -723,6 +811,52 @@ void CIRGenFunction::emitCXXDestructorCall(const
CXXDestructorDecl *dd,
delegating, thisAddr, thisTy);
}
+mlir::Value CIRGenFunction::getVTTParameter(GlobalDecl gd, bool forVirtualBase,
+ bool delegating) {
+ if (!cgm.getCXXABI().needsVTTParameter(gd))
+ return nullptr;
+
+ const CXXRecordDecl *rd = cast<CXXMethodDecl>(curFuncDecl)->getParent();
+ const CXXRecordDecl *base = cast<CXXMethodDecl>(gd.getDecl())->getParent();
+
+ uint64_t subVTTIndex;
+
+ if (delegating) {
+ cgm.errorNYI(rd->getSourceRange(),
+ "getVTTParameter: delegating constructor");
+ return {};
+ } else if (rd == base) {
+ // If the record matches the base, this is the complete ctor/dtor
+ // variant calling the base variant in a class with virtual bases.
+ assert(!cgm.getCXXABI().needsVTTParameter(curGD) &&
+ "doing no-op VTT offset in base dtor/ctor?");
+ assert(!forVirtualBase && "Can't have same class as virtual base!");
+ subVTTIndex = 0;
+ } else {
+ const ASTRecordLayout &layout = getContext().getASTRecordLayout(rd);
+ CharUnits baseOffset = forVirtualBase ? layout.getVBaseClassOffset(base)
+ : layout.getBaseClassOffset(base);
+
+ subVTTIndex =
+ cgm.getVTables().getSubVTTIndex(rd, BaseSubobject(base, baseOffset));
+ assert(subVTTIndex != 0 && "Sub-VTT index must be greater than zero!");
+ }
+
+ mlir::Location loc = cgm.getLoc(rd->getBeginLoc());
+ if (cgm.getCXXABI().needsVTTParameter(curGD)) {
+ // A VTT parameter was passed to the constructor, use it.
+ mlir::Value vtt = loadCXXVTT();
+ return cgm.getBuilder().createVTTAddrPoint(loc, vtt.getType(), vtt,
----------------
xlauko wrote:
```suggestion
return builder.createVTTAddrPoint(loc, vtt.getType(), vtt,
```
https://github.com/llvm/llvm-project/pull/156521
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