diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 482193cd160d30f432e4f027f6993b7f936b0e38..9f96f24d00e198b15d1f4652f6553eb240974051 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2020-12-20  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* config/xtensa/xtensa.md (bswapsi2, bswapdi2): New patterns.
+
+2020-12-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR other/98400
+	* doc/invoke.texi (-mbackchain): Fix a typo - -mmo-backchain ->
+	-mno-backchain.
+
 2020-12-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/98366
diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index ba5e1e7cb1dfc37631ffa32df0415a0e4c48d719..af1c96a117405d5c9d9d7c54660e1db0a11a2c30 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20201220
+20201221
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 367502498cb24873aeacd3013e8bdbe867fcccb1..8d88a88c20d4b1a065ea48b3e1ad52dd5a3c4b00 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,8 @@
+2020-12-20  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	* trans.c (create_var_debug_raw): Set DECL_ARTIFICIAL
+	on variables.
+
 2020-12-18  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/83118
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 12abe0ffdd80009c310c0077c4be039a11d5c039..dc1d0b88c6c161010b6601fce8d9e4c8c51558ff 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2020-12-20  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* gcc.target/xtensa/bswap.c: New test.
+
+2020-12-20  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	* gfortran.dg/coarray/send_char_array_1.f90: Correct coarray
+	indces.
+
 2020-12-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/98366
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 3fea7d35ecb90596a084d202ff845e68264978f2..6a7d1b1e046bbc8047d141b83c15d84fbfd39faf 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,10 @@
+2020-12-20  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* config/xtensa/lib1funcs.S (__bswapsi2, __bswapdi2): New
+	functions.
+	* config/xtensa/t-xtensa (LIB1ASMFUNCS): Add _bswapsi2 and
+	_bswapdi2.
+
 2020-12-08  Ian Lance Taylor  <iant@golang.org>
 
 	* generic-morestack-thread.c (free_segments): Block signals during
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 7933ccd7aac0fcf9650865b6f471ce1ecfc48086..e972e1cf302927a397e84105f6b691074993293b 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2020-12-20  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/std/semaphore: Fix indentation.
+
 2020-12-18  Patrick Palka  <ppalka@redhat.com>
 
 	PR libstdc++/98377