unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp

   1 //===- MCJITTest.cpp - Unit tests for the MCJIT ---------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This test suite verifies basic MCJIT functionality when invoked form the C
  11 // API.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm-c/Analysis.h"
  16 #include "llvm-c/Core.h"
  17 #include "llvm-c/ExecutionEngine.h"
  18 #include "llvm-c/Target.h"
  19 #include "llvm-c/Transforms/Scalar.h"
  20 #include "llvm/Support/Host.h"
  21 #include "MCJITTestAPICommon.h"
  22 #include "gtest/gtest.h"
  23
  24 using namespace llvm;
  25
  26 class MCJITCAPITest : public testing::Test, public MCJITTestAPICommon {
  27 protected:
  28   MCJITCAPITest() {
  29     // The architectures below are known to be compatible with MCJIT as they
  30     // are copied from test/ExecutionEngine/MCJIT/lit.local.cfg and should be
  31     // kept in sync.
  32     SupportedArchs.push_back(Triple::arm);
  33     SupportedArchs.push_back(Triple::mips);
  34     SupportedArchs.push_back(Triple::x86);
  35     SupportedArchs.push_back(Triple::x86_64);
  36
  37     // The operating systems below are known to be sufficiently incompatible
  38     // that they will fail the MCJIT C API tests.
  39     UnsupportedOSs.push_back(Triple::Cygwin);
  40   }
  41 };
  42
  43 TEST_F(MCJITCAPITest, simple_function) {
  44   SKIP_UNSUPPORTED_PLATFORM;
  45
  46   char *error = 0;
  47
  48   // Creates a function that returns 42, compiles it, and runs it.
  49
  50   LLVMModuleRef module = LLVMModuleCreateWithName("simple_module");
  51
  52   LLVMValueRef function = LLVMAddFunction(
  53     module, "simple_function", LLVMFunctionType(LLVMInt32Type(), 0, 0, 0));
  54   LLVMSetFunctionCallConv(function, LLVMCCallConv);
  55
  56   LLVMBasicBlockRef entry = LLVMAppendBasicBlock(function, "entry");
  57   LLVMBuilderRef builder = LLVMCreateBuilder();
  58   LLVMPositionBuilderAtEnd(builder, entry);
  59   LLVMBuildRet(builder, LLVMConstInt(LLVMInt32Type(), 42, 0));
  60
  61   LLVMVerifyModule(module, LLVMAbortProcessAction, &error);
  62   LLVMDisposeMessage(error);
  63
  64   LLVMDisposeBuilder(builder);
  65
  66   LLVMMCJITCompilerOptions options;
  67   LLVMInitializeMCJITCompilerOptions(&options, sizeof(options));
  68   options.OptLevel = 2;
  69
  70   // Just ensure that this field still exists.
  71   options.NoFramePointerElim = false;
  72
  73   LLVMExecutionEngineRef engine;
  74   ASSERT_EQ(
  75     0, LLVMCreateMCJITCompilerForModule(&engine, module, &options,
  76                                         sizeof(options), &error));
  77
  78   LLVMPassManagerRef pass = LLVMCreatePassManager();
  79   LLVMAddTargetData(LLVMGetExecutionEngineTargetData(engine), pass);
  80   LLVMAddConstantPropagationPass(pass);
  81   LLVMAddInstructionCombiningPass(pass);
  82   LLVMRunPassManager(pass, module);
  83   LLVMDisposePassManager(pass);
  84
  85   union {
  86     void *raw;
  87     int (*usable)();
  88   } functionPointer;
  89   functionPointer.raw = LLVMGetPointerToGlobal(engine, function);
  90
  91   EXPECT_EQ(42, functionPointer.usable());
  92
  93   LLVMDisposeExecutionEngine(engine);
  94 }
  95