test/test-code-generation-scopes.cc

// Copyright 2016, VIXL authors
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
//
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//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
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#include "test-runner.h"

#include "aarch64/macro-assembler-aarch64.h"

#define TEST(name)  TEST_(SCOPES_##name)
#define __ masm.

namespace vixl {

// This file contains tests for code generation scopes.

TEST(CodeBufferCheckScope_basic) {
  aarch64::MacroAssembler masm;

  {
    CodeBufferCheckScope scope(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x0, 0);
  }

  masm.FinalizeCode();
}


TEST(CodeBufferCheckScope_Open) {
  aarch64::MacroAssembler masm;

  {
    CodeBufferCheckScope scope;
    __ Mov(aarch64::x0, 0);
    scope.Open(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x1, 1);
  }

  masm.FinalizeCode();
}


TEST(CodeBufferCheckScope_Close) {
  aarch64::MacroAssembler masm;

  {
    CodeBufferCheckScope scope(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x0, 0);
    scope.Close();
    __ Mov(aarch64::x1, 1);
  }

  masm.FinalizeCode();
}


TEST(CodeBufferCheckScope_Open_Close) {
  aarch64::MacroAssembler masm;

  {
    CodeBufferCheckScope scope;
    __ Mov(aarch64::x0, 0);
    scope.Open(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x1, 1);
    scope.Close();
    __ Mov(aarch64::x2, 2);
  }

  masm.FinalizeCode();
}


TEST(EmissionCheckScope_basic) {
  aarch64::MacroAssembler masm;

  {
    EmissionCheckScope scope(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x0, 0);
  }

  masm.FinalizeCode();
}


TEST(EmissionCheckScope_Open) {
  aarch64::MacroAssembler masm;

  {
    EmissionCheckScope scope;
    __ Mov(aarch64::x0, 0);
    scope.Open(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x1, 1);
  }

  masm.FinalizeCode();
}


TEST(EmissionCheckScope_Close) {
  aarch64::MacroAssembler masm;

  {
    EmissionCheckScope scope(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x0, 0);
    scope.Close();
    __ Mov(aarch64::x1, 1);
  }

  masm.FinalizeCode();
}


TEST(EmissionCheckScope_Open_Close) {
  aarch64::MacroAssembler masm;

  {
    EmissionCheckScope scope;
    __ Mov(aarch64::x0, 0);
    scope.Open(&masm, aarch64::kInstructionSize);
    __ Mov(aarch64::x1, 1);
    scope.Close();
    __ Mov(aarch64::x2, 2);
  }

  masm.FinalizeCode();
}


#define ASSERT_LITERAL_POOL_SIZE(expected)                                     \
  VIXL_CHECK(                                                                  \
      (expected + aarch64::kInstructionSize) == (masm.GetLiteralPoolSize()))

TEST(EmissionCheckScope_emit_pool) {
  aarch64::MacroAssembler masm;

  // Make sure the pool is empty;
  masm.EmitLiteralPool(aarch64::LiteralPool::kBranchRequired);
  ASSERT_LITERAL_POOL_SIZE(0);

  __ Ldr(aarch64::x0, 0x1234567890abcdef);
  ASSERT_LITERAL_POOL_SIZE(8);

  {
    // Check that opening the scope with a reserved space well below the limit
    // at which can generate the literal pool does not force the emission of
    // the pool.
    EmissionCheckScope scope(&masm,
                             10 * aarch64::kInstructionSize,
                             EmissionCheckScope::kMaximumSize);
    ASSERT_LITERAL_POOL_SIZE(8);
  }

  {
    // Check that the scope forces emission of the pool if necessary.
    EmissionCheckScope scope(&masm,
                             aarch64::kMaxLoadLiteralRange + 1,
                             EmissionCheckScope::kMaximumSize);
    ASSERT_LITERAL_POOL_SIZE(0);
  }

  masm.FinalizeCode();
}


TEST(EmissionCheckScope_emit_pool_on_Open) {
  aarch64::MacroAssembler masm;

  // Make sure the pool is empty;
  masm.EmitLiteralPool(aarch64::LiteralPool::kBranchRequired);
  ASSERT_LITERAL_POOL_SIZE(0);

  __ Ldr(aarch64::x0, 0x1234567890abcdef);
  ASSERT_LITERAL_POOL_SIZE(8);

  {
    // Check that opening the scope with a reserved space well below the limit
    // at which can generate the literal pool does not force the emission of
    // the pool.
    EmissionCheckScope scope;
    scope.Open(&masm,
               10 * aarch64::kInstructionSize,
               EmissionCheckScope::kMaximumSize);
    ASSERT_LITERAL_POOL_SIZE(8);
  }

  {
    // Check that the scope forces emission of the pool if necessary.
    EmissionCheckScope scope;
    scope.Open(&masm,
               aarch64::kMaxLoadLiteralRange + 1,
               EmissionCheckScope::kMaximumSize);
    ASSERT_LITERAL_POOL_SIZE(0);
  }

  masm.FinalizeCode();
}


}  // namespace vixl