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