================
@@ -1875,8 +1930,29 @@ emitTargetArchBuiltinExpr(CIRGenFunction *cgf, unsigned
builtinID,
return std::nullopt;
case llvm::Triple::x86:
- case llvm::Triple::x86_64:
- return cgf->emitX86BuiltinExpr(builtinID, e);
+ case llvm::Triple::x86_64: {
+ // Try the target-specific emitter first. If it doesn't handle the
+ // builtin, fall back to the generic builtin->intrinsic emitter so target
+ // files don't have to call it themselves.
+ if (std::optional<mlir::Value> res = cgf->emitX86BuiltinExpr(builtinID, e))
+ return *res;
+
+ // Build the operand list
+ llvm::SmallVector<mlir::Value> ops;
+ unsigned iceArguments = 0;
+ ASTContext::GetBuiltinTypeError error;
+ cgf->getContext().GetBuiltinType(builtinID, error, &iceArguments);
+ assert(error == ASTContext::GE_None && "Error while getting builtin
type.");
+
+ for (auto [idx, arg] : llvm::enumerate(e->arguments()))
+ ops.push_back(cgf->emitScalarOrConstFoldImmArg(iceArguments, idx, arg));
+
+ if (std::optional<mlir::Value> maybeRes =
+ cgf->emitGenericBuiltinIntrinsic(builtinID, e, ops))
----------------
Priyanshu3820 wrote:
that indeed makes more sense given that similar builtins are handled there only
but the problem is that even classic codegen doesn't handle rdpmc in the
specific target file
https://github.com/llvm/llvm-project/pull/177639
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