gcc/rtl-tests.c

   1 /* Unit tests for RTL-handling.
   2    Copyright (C) 2015-2016 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "opts.h"
  25 #include "signop.h"
  26 #include "hash-set.h"
  27 #include "fixed-value.h"
  28 #include "alias.h"
  29 #include "flags.h"
  30 #include "symtab.h"
  31 #include "tree-core.h"
  32 #include "stor-layout.h"
  33 #include "tree.h"
  34 #include "stringpool.h"
  35 #include "stor-layout.h"
  36 #include "rtl.h"
  37 #include "pretty-print.h"
  38 #include "cfgbuild.h"
  39 #include "print-rtl.h"
  40 #include "selftest.h"
  41 #include "function.h"
  42 #include "emit-rtl.h"
  43
  44 #if CHECKING_P
  45
  46 namespace selftest {
  47
  48 /* Verify that PAT is printed as EXPECTED.  Helper function for
  49    selftests.  */
  50
  51 static void
  52 verify_print_pattern (const char *expected, rtx pat)
  53 {
  54   pretty_printer pp;
  55   print_pattern (&pp, pat, 1);
  56   ASSERT_STREQ (expected, pp_formatted_text (&pp));
  57 }
  58
  59 /* Unit testing of "single_set".  */
  60
  61 static void
  62 test_single_set ()
  63 {
  64   /* A label is not a SET.  */
  65   ASSERT_EQ (NULL_RTX, single_set (gen_label_rtx ()));
  66
  67   /* An unconditional jump insn is a single SET.  */
  68   rtx set_pc = gen_rtx_SET (pc_rtx,
  69                             gen_rtx_LABEL_REF (VOIDmode,
  70                                                gen_label_rtx ()));
  71   rtx_insn *jump_insn = emit_jump_insn (set_pc);
  72   ASSERT_EQ (set_pc, single_set (jump_insn));
  73
  74   /* etc */
  75 }
  76
  77 /* Construct an unconditional jump to a label, and verify that
  78    various properties of it are sane.  */
  79
  80 static void
  81 test_uncond_jump ()
  82 {
  83   rtx_insn *label = gen_label_rtx ();
  84   rtx jump_pat = gen_rtx_SET (pc_rtx,
  85                               gen_rtx_LABEL_REF (VOIDmode,
  86                                                  label));
  87   ASSERT_EQ (SET, jump_pat->code);
  88   ASSERT_EQ (LABEL_REF, SET_SRC (jump_pat)->code);
  89   ASSERT_EQ (label, LABEL_REF_LABEL (SET_SRC (jump_pat)));
  90   ASSERT_EQ (PC, SET_DEST (jump_pat)->code);
  91
  92   verify_print_pattern ("pc=L0", jump_pat);
  93
  94   rtx_insn *jump_insn = emit_jump_insn (jump_pat);
  95   ASSERT_FALSE (any_condjump_p (jump_insn));
  96   ASSERT_TRUE (any_uncondjump_p (jump_insn));
  97   ASSERT_TRUE (pc_set (jump_insn));
  98   ASSERT_TRUE (simplejump_p (jump_insn));
  99   ASSERT_TRUE (onlyjump_p (jump_insn));
 100   ASSERT_TRUE (control_flow_insn_p (jump_insn));
 101 }
 102
 103 /* Run all of the selftests within this file.  */
 104
 105 void
 106 rtl_tests_c_tests ()
 107 {
 108   test_single_set ();
 109   test_uncond_jump ();
 110
 111   /* Purge state.  */
 112   set_first_insn (NULL);
 113   set_last_insn (NULL);
 114 }
 115
 116 } // namespace selftest
 117 #endif /* #if CHECKING_P */