From 5bd3ac2be57798bf8dc1be0c10aca2dfb78452aa Mon Sep 17 00:00:00 2001
From: Stefano Sanfilippo <a.little.coder@gmail.com>
Date: Sun, 23 Feb 2020 09:53:14 +0100
Subject: [PATCH] Implement "avvertite don ulrico" statement.

---
 src/codegen.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/codegen.cpp b/src/codegen.cpp
index 61f4e20..3d685fd 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -102,6 +102,7 @@ public:
   llvm::Value* visitLoopStatement(const LoopStatement* l);
   llvm::Value* visitInputStatement(const InputStatement* s);
   llvm::Value* visitPrintStatement(const PrintStatement* p);
+  llvm::Value* visitAbortStatement(const AbortStatement* a);
   llvm::Value* visitExpressionStatement(const ExpressionStatement* s) {
     visit(s->getExpression());
     return nullptr;
@@ -166,6 +167,8 @@ llvm::Value* NestedScopes::lookup(const std::string& name) {
 }
 
 void IRGenerator::declareBuiltins() {
+  module_->getOrInsertFunction("abort", llvm::FunctionType::get(builder_.getVoidTy(), false));
+
   llvm::FunctionType* printf_type =
       llvm::FunctionType::get(builder_.getInt32Ty(), {builder_.getInt8PtrTy()}, true);
   auto no_alias = llvm::AttributeList().addAttribute(context_, 1, llvm::Attribute::NoAlias);
@@ -535,6 +538,13 @@ llvm::Value* IRGenerator::visitPrintStatement(const PrintStatement* p) {
   return nullptr;
 }
 
+llvm::Value* IRGenerator::visitAbortStatement(const AbortStatement*) {
+  auto abort_builtin = module_->getFunction("abort");
+  assert(abort_builtin && "Builtin abort was not declared");
+  builder_.CreateCall(abort_builtin);
+  return nullptr;
+}
+
 llvm::Value* IRGenerator::visitBinaryExpression(const BinaryExpression* e) {
   auto lhs = visit(e->getLeft());
   auto rhs = visit(e->getRight());