Function CodegenInnerLoop

be/src/codegen/llvm-codegen-test.cc:203–223

IR for the generated linner loop: define void @JittedInnerLoop(i64* %counter) { entry: %0 = call i32 (i8*, ...) @printf( i8* getelementptr inbounds ([19 x i8], [19 x i8]* @0, i32 0, i32 0)) %1 = load i64, i64* %counter %2 = add i64 %1, 1 store i64 %2, i64* %counter ret void }

//   ret void
// }
llvm::Function* CodegenInnerLoop(
    LlvmCodeGen* codegen, int delta) {
  llvm::LLVMContext& context = codegen->context();
  LlvmBuilder builder(context);

  LlvmCodeGen::FnPrototype fn_prototype(codegen, "JittedInnerLoop", codegen->void_type());
  fn_prototype.AddArgument(
      LlvmCodeGen::NamedVariable("counter", codegen->i64_ptr_type()));
  llvm::Value* counter;
  llvm::Function* jitted_loop_call = fn_prototype.GeneratePrototype(&builder, &counter);
  codegen->CodegenDebugTrace(&builder, "Jitted\n");

  // Store &jitted_counter as a constant.
  llvm::Value* const_delta = codegen->GetI64Constant(delta);
  llvm::Value* loaded_counter = builder.CreateLoad(counter);
  llvm::Value* incremented_value = builder.CreateAdd(loaded_counter, const_delta);
  builder.CreateStore(incremented_value, counter);
  builder.CreateRetVoid();

  return codegen->FinalizeFunction(jitted_loop_call);
}

// This test loads a precompiled IR file (compiled from testdata/llvm/test-loop.cc).
// The test contains two functions, an outer loop function and an inner loop function.