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| //===- executionengine_test.go - Tests for executionengine ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file tests bindings for the executionengine component.
//
//===----------------------------------------------------------------------===//
package llvm
import (
"testing"
)
func TestFactorial(t *testing.T) {
LinkInMCJIT()
InitializeNativeTarget()
InitializeNativeAsmPrinter()
mod := NewModule("fac_module")
fac_args := []Type{Int32Type()}
fac_type := FunctionType(Int32Type(), fac_args, false)
fac := AddFunction(mod, "fac", fac_type)
fac.SetFunctionCallConv(CCallConv)
n := fac.Param(0)
entry := AddBasicBlock(fac, "entry")
iftrue := AddBasicBlock(fac, "iftrue")
iffalse := AddBasicBlock(fac, "iffalse")
end := AddBasicBlock(fac, "end")
builder := NewBuilder()
defer builder.Dispose()
builder.SetInsertPointAtEnd(entry)
If := builder.CreateICmp(IntEQ, n, ConstInt(Int32Type(), 0, false), "cmptmp")
builder.CreateCondBr(If, iftrue, iffalse)
builder.SetInsertPointAtEnd(iftrue)
res_iftrue := ConstInt(Int32Type(), 1, false)
builder.CreateBr(end)
builder.SetInsertPointAtEnd(iffalse)
n_minus := builder.CreateSub(n, ConstInt(Int32Type(), 1, false), "subtmp")
call_fac_args := []Value{n_minus}
call_fac := builder.CreateCall(fac, call_fac_args, "calltmp")
res_iffalse := builder.CreateMul(n, call_fac, "multmp")
builder.CreateBr(end)
builder.SetInsertPointAtEnd(end)
res := builder.CreatePHI(Int32Type(), "result")
phi_vals := []Value{res_iftrue, res_iffalse}
phi_blocks := []BasicBlock{iftrue, iffalse}
res.AddIncoming(phi_vals, phi_blocks)
builder.CreateRet(res)
err := VerifyModule(mod, ReturnStatusAction)
if err != nil {
t.Errorf("Error verifying module: %s", err)
return
}
options := NewMCJITCompilerOptions()
options.SetMCJITOptimizationLevel(2)
options.SetMCJITEnableFastISel(true)
options.SetMCJITNoFramePointerElim(true)
options.SetMCJITCodeModel(CodeModelJITDefault)
engine, err := NewMCJITCompiler(mod, options)
if err != nil {
t.Errorf("Error creating JIT: %s", err)
return
}
defer engine.Dispose()
pass := NewPassManager()
defer pass.Dispose()
pass.AddConstantPropagationPass()
pass.AddInstructionCombiningPass()
pass.AddPromoteMemoryToRegisterPass()
pass.AddGVNPass()
pass.AddCFGSimplificationPass()
pass.Run(mod)
exec_args := []GenericValue{NewGenericValueFromInt(Int32Type(), 10, false)}
exec_res := engine.RunFunction(fac, exec_args)
var fac10 uint64 = 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1
if exec_res.Int(false) != fac10 {
t.Errorf("Expected %d, got %d", fac10, exec_res.Int(false))
}
}
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