New mklog script.

contrib/ChangeLog:

2020-05-15  Martin Liska  <mliska@suse.cz>

	* gcc-git-customization.sh: Add
	alias.gcc-mklog new hook.
	* mklog.py: New file.
	* test_mklog.py: New file.

1 files changed, 345 insertions, 0 deletions

diff --git a/contrib/test_mklog.py b/contrib/test_mklog.py
new file mode 100755
index 0000000..ca7b9e7
--- /dev/null
+++ b/contrib/test_mklog.py
@@ -0,0 +1,345 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2020 Free Software Foundation, Inc.
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING.  If not, write to
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+# This script parses a .diff file generated with 'diff -up' or 'diff -cp'
+# and adds a skeleton ChangeLog file to the file. It does not try to be
+# too smart when parsing function names, but it produces a reasonable
+# approximation.
+#
+# Author: Martin Liska <mliska@suse.cz>
+
+import unittest
+
+from mklog import generate_changelog
+
+PATCH1 = '''\
+diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
+index 567c23380fe..e6209ede9d6 100644
+--- a/gcc/config/riscv/riscv.h
++++ b/gcc/config/riscv/riscv.h
+@@ -920,6 +920,7 @@ extern unsigned riscv_stack_boundary;
+ #define SHIFT_RS1 15
+ #define SHIFT_IMM 20
+ #define IMM_BITS 12
++#define C_S_BITS 5
+ #define C_SxSP_BITS 6
+ 
+ #define IMM_REACH (1LL << IMM_BITS)
+@@ -929,6 +930,10 @@ extern unsigned riscv_stack_boundary;
+ #define SWSP_REACH (4LL << C_SxSP_BITS)
+ #define SDSP_REACH (8LL << C_SxSP_BITS)
+ 
++/* This is the maximum value that can be represented in a compressed load/store
++   offset (an unsigned 5-bit value scaled by 4).  */
++#define CSW_MAX_OFFSET ((4LL << C_S_BITS) - 1) & ~3
++
+ /* Called from RISCV_REORG, this is defined in riscv-sr.c.  */
+ 
+ extern void riscv_remove_unneeded_save_restore_calls (void);
+
+'''
+
+EXPECTED1 = '''\
+gcc/ChangeLog:
+
+	* config/riscv/riscv.h (C_S_BITS):
+	(CSW_MAX_OFFSET):
+
+'''
+
+PATCH2 = '''\
+diff --git a/gcc/targhooks.h b/gcc/targhooks.h
+index 9704d23f1db..b572a36e8cf 100644
+--- a/gcc/targhooks.h
++++ b/gcc/targhooks.h
+@@ -120,7 +120,7 @@ extern bool default_empty_mask_is_expensive (unsigned);
+ extern void *default_init_cost (class loop *);
+ extern unsigned default_add_stmt_cost (class vec_info *, void *, int,
+ 				       enum vect_cost_for_stmt,
+-				       class _stmt_vec_info *, int,
++				       class _stmt_vec_info *, tree, int,
+ 				       enum vect_cost_model_location);
+ extern void default_finish_cost (void *, unsigned *, unsigned *, unsigned *);
+ extern void default_destroy_cost_data (void *);
+@@ -186,6 +186,7 @@ extern tree default_emutls_var_init (tree, tree, tree);
+ extern unsigned int default_hard_regno_nregs (unsigned int, machine_mode);
+ extern bool default_hard_regno_scratch_ok (unsigned int);
+ extern bool default_mode_dependent_address_p (const_rtx, addr_space_t);
++extern bool default_new_address_profitable_p (rtx, rtx_insn *, rtx);
+ extern bool default_target_option_valid_attribute_p (tree, tree, tree, int);
+ extern bool default_target_option_pragma_parse (tree, tree);
+ extern bool default_target_can_inline_p (tree, tree);
+
+'''
+
+EXPECTED2 = '''\
+gcc/ChangeLog:
+
+	* targhooks.h (default_add_stmt_cost):
+	(default_new_address_profitable_p):
+
+'''
+
+PATCH3 = '''\
+diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h
+index 2b1e33f94ae..7f47402f9b9 100644
+--- a/libcpp/include/cpplib.h
++++ b/libcpp/include/cpplib.h
+@@ -173,7 +173,7 @@ enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_GNUC11, CLK_GNUC17, CLK_GNUC2X,
+ 	     CLK_STDC2X,
+ 	     CLK_GNUCXX, CLK_CXX98, CLK_GNUCXX11, CLK_CXX11,
+ 	     CLK_GNUCXX14, CLK_CXX14, CLK_GNUCXX17, CLK_CXX17,
+-	     CLK_GNUCXX2A, CLK_CXX2A, CLK_ASM};
++	     CLK_GNUCXX20, CLK_CXX20, CLK_ASM};
+ 
+ /* Payload of a NUMBER, STRING, CHAR or COMMENT token.  */
+ struct GTY(()) cpp_string {
+@@ -484,7 +484,7 @@ struct cpp_options
+   /* Nonzero for C2X decimal floating-point constants.  */
+   unsigned char dfp_constants;
+ 
+-  /* Nonzero for C++2a __VA_OPT__ feature.  */
++  /* Nonzero for C++20 __VA_OPT__ feature.  */
+   unsigned char va_opt;
+ 
+   /* Nonzero for the '::' token.  */
+
+'''
+
+EXPECTED3 = '''\
+libcpp/ChangeLog:
+
+	* include/cpplib.h (enum c_lang):
+	(struct cpp_options):
+
+'''
+
+EXPECTED3B = '''\
+libcpp/ChangeLog:
+
+	* include/cpplib.h:
+
+'''
+
+PATCH4 = '''\
+diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
+index aab79492357..f0df1002488 100644
+--- a/gcc/ipa-icf.c
++++ b/gcc/ipa-icf.c
+@@ -1,5 +1,7 @@
+ 
+ 
++
++
+ /* Interprocedural Identical Code Folding pass
+    Copyright (C) 2014-2020 Free Software Foundation, Inc.
+ 
+diff --git a/gcc/testsuite/gcc.dg/pr32374.c b/gcc/testsuite/gcc.dg/pr32374.c
+deleted file mode 100644
+index de15d559f5b..00000000000
+--- a/gcc/testsuite/gcc.dg/pr32374.c
++++ /dev/null
+@@ -1,20 +0,0 @@
+-/* { dg-do compile } */
+-/* { dg-options "-O2" } */
+-
+-extern int *stderr;
+-
+-void f (int *, const char *, ...);
+-
+-void g (const char *conf_name)
+-{
+-  typedef struct
+-  {
+-    const char *label;
+-    const int value;
+-  } Section;
+-
+-  const Section sections[2] = { {"", 0}, {"", 1} };
+-
+-  f (stderr, "", "", conf_name, 0, sections[0]);
+-  f (stderr, "", "", conf_name, 0, sections[0]);
+-}
+diff --git a/gcc/testsuite/gcc.dg/pr40209.c b/gcc/testsuite/gcc.dg/pr40209.c
+index 4e77df5c2e6..c23d69d1f1b 100644
+--- a/gcc/testsuite/gcc.dg/pr40209.c
++++ b/gcc/testsuite/gcc.dg/pr40209.c
+@@ -1,6 +1,8 @@
+ /* { dg-do compile } */
+ /* { dg-options "-O2 -fprofile-use -fopt-info -Wno-missing-profile" } */
+ 
++
++
+ void process(const char *s);
+ 
+ struct BaseHolder {
+diff --git a/gcc/testsuite/gcc.dg/pr50209.c b/gcc/testsuite/gcc.dg/pr50209.c
+new file mode 100644
+index 00000000000..b28b04f6431
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/pr50209.c
+@@ -0,0 +1,3 @@
++
++
++
+diff --git a/gcc/testsuite/gcc.dg/pr63567-1.c b/gcc/testsuite/gcc.dg/pr63567-1.c
+index 97da171563e..00c5ecc11fa 100644
+--- a/gcc/testsuite/gcc.dg/pr63567-1.c
++++ b/gcc/testsuite/gcc.dg/pr63567-1.c
+@@ -1,3 +1,4 @@
++
+ /* PR c/63567 */
+ /* { dg-do compile } */
+ /* { dg-options "" } */
+diff --git a/gcc/varasm.c b/gcc/varasm.c
+index f062e48071f..fd3c7ca8cf3 100644
+--- a/gcc/varasm.c
++++ b/gcc/varasm.c
+@@ -1,3 +1,5 @@
++
++
+ /* Output variables, constants and external declarations, for GNU compiler.
+    Copyright (C) 1987-2020 Free Software Foundation, Inc.
+ 
+diff --git a/libssp/gets-chk.c b/libssp/gets-chk.c
+index 4ad78c1f77b..6687b368038 100644
+--- a/libssp/gets-chk.c
++++ b/libssp/gets-chk.c
+@@ -32,6 +32,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ <http://www.gnu.org/licenses/>.  */
+ 
+ 
++
++
+ #include "config.h"
+ #include <ssp/ssp.h>
+ #include <stdarg.h>
+'''
+
+EXPECTED4 = '''\
+gcc/ChangeLog:
+
+	* ipa-icf.c:
+	* varasm.c:
+
+libssp/ChangeLog:
+
+	* gets-chk.c:
+
+gcc/testsuite/ChangeLog:
+
+	* gcc.dg/pr40209.c:
+	* gcc.dg/pr63567-1.c:
+	* gcc.dg/pr32374.c: Removed.
+	* gcc.dg/pr50209.c: New test.
+
+'''
+
+PATCH5 = '''\
+diff --git a/gcc/testsuite/gcc.target/i386/pr95046-6.c b/gcc/testsuite/gcc.target/i386/pr95046-6.c
+new file mode 100644
+index 00000000000..dcc8999c446
+--- /dev/null
++++ b/gcc/testsuite/gcc.target/i386/pr95046-6.c
+@@ -0,0 +1,44 @@
++/* PR target/95046 */
++/* { dg-do compile { target { ! ia32 } } } */
++/* { dg-options "-O3 -mavx512vl" } */
++
++
++double r[2];
++int s[2];
++unsigned int u[2];
++
++void
++test_float (void)
++{
++  for (int i = 0; i < 2; i++)
++    r[i] = s[i];
++}
++
++/* { dg-final { scan-assembler "\tvcvtdq2pd" } } */
++
++void
++test_ufloat (void)
++{
++  for (int i = 0; i < 2; i++)
++    r[i] = u[i];
++}
++
++/* { dg-final { scan-assembler "\tvcvtudq2pd" } } */
++
++void
++test_fix (void)
++{
++  for (int i = 0; i < 2; i++)
++    s[i] = r[i];
++}
++
++/* { dg-final { scan-assembler "\tvcvttpd2dqx" } } */
++
++void
++test_ufix (void)
++{
++  for (int i = 0; i < 2; i++)
++    u[i] = r[i];
++}
++
++/* { dg-final { scan-assembler "\tvcvttpd2udqx" } } */
+-- 
+2.26.2
+
+'''
+
+EXPECTED5 = '''\
+PR target/95046 - Vectorize V2SFmode operations
+
+gcc/testsuite/ChangeLog:
+
+	PR target/95046
+	* gcc.target/i386/pr95046-6.c: New test.
+
+'''
+
+class TestMklog(unittest.TestCase):
+    def test_macro_definition(self):
+        changelog = generate_changelog(PATCH1)
+        assert changelog == EXPECTED1
+
+    def test_changed_argument(self):
+        changelog = generate_changelog(PATCH2)
+        assert changelog == EXPECTED2
+
+    def test_enum_and_struct(self):
+        changelog = generate_changelog(PATCH3)
+        assert changelog == EXPECTED3
+
+    def test_no_function(self):
+        changelog = generate_changelog(PATCH3, True)
+        assert changelog == EXPECTED3B
+
+    def test_sorting(self):
+        changelog = generate_changelog(PATCH4)
+        assert changelog == EXPECTED4
+
+    def test_pr_bugzilla_download(self):
+        changelog = generate_changelog(PATCH5, fill_pr_titles=True)
+        assert changelog == EXPECTED5