Merge branch 'YosysHQ:main' into master

.github/workflows/test-build.yml

@@ -56,7 +56,7 @@ jobs:
           mkdir build
           cd build
           make -f ../Makefile config-$CC
-          make -f ../Makefile -j$procs
+          make -f ../Makefile -j$procs ENABLE_LTO=1
 
       - name: Log yosys-config output
         run: |

.github/workflows/test-verific.yml

@@ -41,7 +41,7 @@ jobs:
           echo "ENABLE_VERIFIC_LIBERTY := 1" >> Makefile.conf
           echo "ENABLE_VERIFIC_YOSYSHQ_EXTENSIONS := 1" >> Makefile.conf
           echo "ENABLE_CCACHE := 1" >> Makefile.conf
-          make -j${{ env.procs }}
+          make -j${{ env.procs }} ENABLE_LTO=1
 
       - name: Install Yosys
         run: |

CHANGELOG

@@ -2,8 +2,21 @@
 List of major changes and improvements between releases
 =======================================================
 
-Yosys 0.43 .. Yosys 0.44-dev
+Yosys 0.43 .. Yosys 0.44
 --------------------------
+ * Various
+    - Added ENABLE_LTO compile option to enable link time
+      optimizations.
+    - Build support for Haiku OS.
+
+ * New commands and options
+    - Added "keep_hierarchy" pass to add attribute with 
+      same name to modules based on cost.
+    - Added options "-noopt","-bloat" and "-check_cost" to
+      "test_cell" pass. 
+
+ * New back-ends
+    - Added initial PolarFire support. ( synth_microchip )
 
 Yosys 0.42 .. Yosys 0.43
 --------------------------

Makefile

@@ -34,7 +34,7 @@ ENABLE_PYOSYS := 1
 ENABLE_GCOV := 0
 ENABLE_GPROF := 0
 ENABLE_DEBUG := 0
-ENABLE_LTO := 1
+ENABLE_LTO := 0
 ENABLE_CCACHE := 0
 # sccache is not always a drop-in replacement for ccache in practice
 ENABLE_SCCACHE := 0
@@ -153,7 +153,7 @@ ifeq ($(OS), Haiku)
 CXXFLAGS += -D_DEFAULT_SOURCE
 endif
 
-YOSYS_VER := 0.43+86
+YOSYS_VER := 0.44
 
 # Note: We arrange for .gitcommit to contain the (short) commit hash in
 # tarballs generated with git-archive(1) using .gitattributes. The git repo
@@ -169,7 +169,7 @@ endif
 OBJS = kernel/version_$(GIT_REV).o
 
 bumpversion:
-	sed -i "/^YOSYS_VER := / s/+[0-9][0-9]*$$/+`git log --oneline ead4718.. | wc -l`/;" Makefile
+#	sed -i "/^YOSYS_VER := / s/+[0-9][0-9]*$$/+`git log --oneline ead4718.. | wc -l`/;" Makefile
 
 ABCMKARGS = CC="$(CXX)" CXX="$(CXX)" ABC_USE_LIBSTDCXX=1 ABC_USE_NAMESPACE=abc VERBOSE=$(Q)
 
@@ -223,7 +223,9 @@ LTOFLAGS := $(GCC_LTO)
 ifeq ($(CONFIG),clang)
 CXX = clang++
 CXXFLAGS += -std=$(CXXSTD) $(OPT_LEVEL)
+ifeq ($(ENABLE_LTO),1)
 LINKFLAGS += -fuse-ld=lld
+endif
 ABCMKARGS += ARCHFLAGS="-DABC_USE_STDINT_H $(ABC_ARCHFLAGS)"
 LTOFLAGS := $(CLANG_LTO)
 

README.md

@@ -116,6 +116,17 @@ unless `CXX` is assigned in the call to make, e.g.
 
   $ make CXX=$CXX
 
+The Makefile has many variables influencing the build process. These can be
+adjusted by modifying the Makefile.conf file which is created at the
+`make config-...` step (see above), or they can be set by passing an option
+to the make command directly.
+
+For example, if you have clang, and (a compatible version of) `ld.lld`
+available in PATH, it's recommended to speed up incremental builds with
+lld by enabling LTO:
+
+ $ make ENABLE_LTO=1
+
 For other compilers and build configurations it might be
 necessary to make some changes to the config section of the
 Makefile.

docs/source/conf.py

@@ -5,7 +5,7 @@ import os
 project = 'YosysHQ Yosys'
 author = 'YosysHQ GmbH'
 copyright ='2024 YosysHQ GmbH'
-yosys_ver = "0.43"
+yosys_ver = "0.44"
 
 # select HTML theme
 html_theme = 'furo'