text: //===- ScheduleOptimizerTest.cpp ------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  #include "polly/ScheduleOptimizer.h"
  #include "gtest/gtest.h"
  #include "isl/stream.h"
  #include "isl/val.h"
  
  using namespace isl;
  namespace {
  
  TEST(ScheduleOptimizer, getPartialTilePrefixes) {
  
    isl_ctx *ctx = isl_ctx_alloc();
  
    {
      // Verify that for a loop with 3 iterations starting at 0 that is
      // pre-vectorized (strip-mined with a factor of 2), we correctly identify
      // that only the first two iterations are full vector iterations.
      isl::map Schedule(
          ctx, "{[i] -> [floor(i/2), i - 2 * floor(i/2)] : 0 <= i < 3 }");
      isl::set ScheduleRange = Schedule.range();
      isl::set Result = getPartialTilePrefixes(ScheduleRange, 2);
  
      EXPECT_TRUE(Result.is_equal(isl::set(ctx, "{[0]}")));
    }
  
    {
      // Verify that for a loop with 3 iterations starting at 1 that is
      // pre-vectorized (strip-mined with a factor of 2), we correctly identify
      // that only the last two iterations are full vector iterations.
      isl::map Schedule(
          ctx, "{[i] -> [floor(i/2), i - 2 * floor(i/2)] : 1 <= i < 4 }");
      isl::set ScheduleRange = Schedule.range();
      isl::set Result = getPartialTilePrefixes(ScheduleRange, 2);
  
      EXPECT_TRUE(Result.is_equal(isl::set(ctx, "{[1]}")));
    }
  
    {
      // Verify that for a loop with 6 iterations starting at 1 that is
      // pre-vectorized (strip-mined with a factor of 2), we correctly identify
      // that all but the first and the last iteration are full vector iterations.
      isl::map Schedule(
          ctx, "{[i] -> [floor(i/2), i - 2 * floor(i/2)] : 1 <= i < 6 }");
      isl::set ScheduleRange = Schedule.range();
      isl::set Result = getPartialTilePrefixes(ScheduleRange, 2);
  
      EXPECT_TRUE(Result.is_equal(isl::set(ctx, "{[1]; [2]}")));
    }
  
    isl_ctx_free(ctx);
  }
  } // anonymous namespace
  