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verilator/src/Makefile_obj.in
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Geza Lore e4f210eb38 Optimize Dfg algorithms with an open addressing hash table (#8307) 
This patch introduces V3HashTable.h, which defines an open addressing,
linear probing hash table. The table implement the public V3HashSet and
V3HashMap templates, which are generic containers. The benefit of this
over std::unordered_map and std::unordered_set is far better memory
locality during lookup. (The STL containers use chaining and require a
new heap allocation for every insertion, similarly probing involves
pointer chasing on collisions).

The new data structure is use in V3DfgCache, and V3DfgCse and yields a
significant speed improvement of those passes on large designs.
2026-09-08 23:21:13 +01:00

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Makefile
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# -*- Makefile -*-
#*****************************************************************************
#
# DESCRIPTION: Verilator: Makefile for verilog source
#
# Code available from: https://verilator.org
#
#*****************************************************************************
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of either the GNU Lesser General Public License Version 3
# or the Perl Artistic License Version 2.0.
# SPDX-FileCopyrightText: 2025-2026 Wilson Snyder
# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
#
#****************************************************************************/
#### Start of system configuration section. ####
# Unfortunately configure uses relative paths, and this makefile is called
# from a level lower, so we need to move up if it's relative, not if absolute.
config_srcdir = @srcdir@
ifeq ($(config_srcdir),.)
srcdir = ..
else # Run an experiment
ifeq ($(wildcard $(config_srcdir)/../Makefile_obj.in),)
srcdir = $(config_srcdir)
else
srcdir = $(config_srcdir)/..
endif
endif
incdir = $(srcdir)/../include
# Bldsrc may differ from srcdir if configure wan't run from the kit top
bldsrc = ..
# Programs
CC = false # Everything is built as C++ via CXX
CXX = @CXX@
LINK = @CXX@
LEX = @LEX@
LFLAGS = -d
PYTHON3 = @PYTHON3@
YACC = @YACC@
OBJCACHE ?= @OBJCACHE@
prefix = @prefix@
# Directory in which to install data across multiple architectures
datarootdir = @datarootdir@
# Directory in which to install package-specific files
# Generally ${prefix}/share/verilator
pkgdatadir = @pkgdatadir@
# Compile options
CFG_WITH_CCWARN = @CFG_WITH_CCWARN@
CFG_WITH_DEFENV = @CFG_WITH_DEFENV@
CFG_WITH_DEV_GCOV = @CFG_WITH_DEV_GCOV@
CFG_WITH_SOLVER = @CFG_WITH_SOLVER@
CPPFLAGS += @CPPFLAGS@
CFLAGS += @CFLAGS@
CXXFLAGS += @CXXFLAGS@
LDFLAGS += @LDFLAGS@
EXEEXT = @EXEEXT@
CFG_CXXFLAGS_SRC = @CFG_CXXFLAGS_SRC@
CFG_CXXFLAGS_PARSER = @CFG_CXXFLAGS_PARSER@
# Compiler flags that turn on extra warnings
CFG_CXXFLAGS_WEXTRA = @CFG_CXXFLAGS_WEXTRA@
CFG_LDFLAGS_SRC = @CFG_LDFLAGS_SRC@
CFG_LIBS = @CFG_LIBS@
CFG_CXXFLAGS_PCH = -x c++-header
# Compiler option to put in front of filename to read precompiled header
CFG_CXXFLAGS_PCH_I = @CFG_CXXFLAGS_PCH_I@
# Compiler's filename prefix for precompiled headers, .gch if clang, empty if GCC
CFG_GCH_IF_CLANG = @CFG_GCH_IF_CLANG@
#### End of system configuration section. ####
VPATH += . $(bldsrc) $(srcdir)
TGT = ../../verilator_bin$(EXEEXT)
#################
ifeq ($(VL_NOOPT),1)
CPPFLAGS += -O0
else ifeq ($(VL_DEBUG),)
# Optimize
CPPFLAGS += @CFG_CXXFLAGS_OPT@
else
# Debug
CPPFLAGS += @CFG_CXXFLAGS_DBG@ -DVL_DEBUG -D_GLIBCXX_DEBUG
LDFLAGS += @CFG_LDFLAGS_DBG@
endif
#################
#LIBS += -ldl
#CCMALLOC = /usr/local/lib/ccmalloc-gcc.o -lccmalloc -ldl
# -lfl not needed as Flex invoked with %nowrap option
LIBS = $(CFG_LIBS) -lm
CPPFLAGS += -DVERILATOR_INTERNAL_
CPPFLAGS += -MMD
CPPFLAGS += -I. -I$(bldsrc) -I$(srcdir) -I$(incdir) -I../../include
#CPPFLAGS += -DVL_ALLOC_RANDOM_CHECKS # To allow --debug-new-random
#CPPFLAGS += -DVL_LEAK_CHECKS # If running valgrind or other hunting tool
CPPFLAGS += -MP # Only works on recent GCC versions
# Replaces VNUser's union with a std::variant to validate int vs void* usage
# Ignored unless the build is C++17 or newer
#CPPFLAGS += -DVL_USER_TYPE_CHECKS
ifeq ($(CFG_WITH_CCWARN),yes) # Local... Else don't burden users
CPPFLAGS += -W -Wall $(CFG_CXXFLAGS_WEXTRA) $(CFG_CXXFLAGS_SRC) -Werror
#CPPFLAGS += -pedantic-errors
else
CPPFLAGS += $(CFG_CXXFLAGS_SRC)
endif
LDFLAGS += $(CFG_LDFLAGS_SRC)
CPPFLAGSWALL = $(CPPFLAGS)
CPPFLAGSPARSER = $(CPPFLAGS) $(CFG_CXXFLAGS_PARSER)
# Allow RPM builds to specify hardcoded data directories
# To do this:
ifeq ($(CFG_WITH_DEFENV),yes)
CPPFLAGS += -DDEFENV_SYSTEMC=\"$(SYSTEMC)\"
CPPFLAGS += -DDEFENV_SYSTEMC_ARCH=\"$(SYSTEMC_ARCH)\"
CPPFLAGS += -DDEFENV_SYSTEMC_INCLUDE=\"$(SYSTEMC_INCLUDE)\"
CPPFLAGS += -DDEFENV_SYSTEMC_LIBDIR=\"$(SYSTEMC_LIBDIR)\"
ifeq ($(VERILATOR_ROOT),) # Use what we're given, or intuit
CPPFLAGS += -DDEFENV_VERILATOR_ROOT=\"$(pkgdatadir)\"
else
CPPFLAGS += -DDEFENV_VERILATOR_ROOT=\"$(VERILATOR_ROOT)\"
endif
ifneq ($(CFG_WITH_SOLVER),no)
CPPFLAGS += -DDEFENV_VERILATOR_SOLVER='"$(CFG_WITH_SOLVER)"'
else
ifneq ($(VERILATOR_SOLVER),)
CPPFLAGS += -DDEFENV_VERILATOR_SOLVER='"$(VERILATOR_SOLVER)"'
endif
endif
endif
# Object file specific options
CXXFLAGSOBJ =
ifeq ($(CFG_WITH_DEV_GCOV),yes)
# Adding '-fkeep-inline-functions' to all files slows down coverage collection
# during 'make test' by ~3x. This option is only useful to make sure that
# 'inline' functions defined in headers are actually emitted so they show up as
# uncovered if they are never called, so instead of adding it everywhere, use
# only on a few files that together pull in most of the headers.
Verilator.o V3Dfg.o: CXXFLAGSOBJ += -fkeep-inline-functions
endif
HEADERS = $(wildcard V*.h v*.h)
ASTGEN = $(srcdir)/astgen
BISONPRE = $(srcdir)/bisonpre
FLEXFIX = $(srcdir)/flexfix
VLCOVGEN = $(srcdir)/vlcovgen
# BISON_DEBUG = -Wcounterexamples
######################################################################
# CCACHE flags (via environment as no command line option available)
CCACHE_SLOPPINESS ?= pch_defines,time_macros
export CCACHE_SLOPPINESS
######################################################################
#### Top level
all: make_info $(TGT)
make_info:
@echo " Compile flags: " $(CXX) ${CFLAGS} ${CXXFLAGS} ${CPPFLAGS}
clean mostlyclean distclean maintainer-clean::
-rm -f *.o *.d *_gen_*
-rm -f *__gen*
-rm -f obj_* .objcache*
distclean maintainer-clean:: clean
maintainer-clean::
maintainer-copy::
#### Top executable
RAW_OBJS = \
V3Const__gen.o \
V3Error.o \
V3FileLine.o \
V3Graph.o \
V3GraphAcyc.o \
V3GraphAlg.o \
V3GraphPathChecker.o \
V3GraphTest.o \
V3Hash.o \
V3HashTable.o \
V3OptionParser.o \
V3Os.o \
V3ParseGrammar.o \
V3ParseImp.o \
V3ParseLex.o \
V3PreProc.o \
V3PreShell.o \
V3String.o \
V3ThreadPool.o \
V3Waiver.o \
Verilator.o \
RAW_OBJS_PCH_ASTMT = \
V3Ast.o \
V3AstNodes.o \
V3Broken.o \
V3Control.o \
V3EmitCBase.o \
V3EmitCConstPool.o \
V3EmitCFunc.o \
V3EmitCHeaders.o \
V3EmitCImp.o \
V3EmitCInlines.o \
V3EmitCPch.o \
V3EmitV.o \
V3File.o \
V3FuncOpt.o \
V3Global.o \
V3Hasher.o \
V3Number.o \
V3Options.o \
V3Stats.o \
V3StatsReport.o \
V3VariableOrder.o \
RAW_OBJS_PCH_ASTNOMT = \
V3Active.o \
V3ActiveTop.o \
V3Assert.o \
V3AssertNfa.o \
V3AssertPre.o \
V3Begin.o \
V3Branch.o \
V3CCtors.o \
V3CUse.o \
V3Case.o \
V3Cast.o \
V3Cfg.o \
V3CfgBuilder.o \
V3CfgLiveVariables.o \
V3Class.o \
V3ClassGraph.o \
V3Clean.o \
V3Clock.o \
V3Combine.o \
V3Common.o \
V3Coverage.o \
V3Covergroup.o \
V3CoverageJoin.o \
V3Dead.o \
V3Delayed.o \
V3Depth.o \
V3DepthBlock.o \
V3Descope.o \
V3Dfg.o \
V3DfgAstToDfg.o \
V3DfgBreakCycles.o \
V3DfgColorSCCs.o \
V3DfgCse.o \
V3DfgDataType.o \
V3DfgDecomposition.o \
V3DfgDfgToAst.o \
V3DfgOptimizer.o \
V3DfgPasses.o \
V3DfgPeephole.o \
V3DfgPushDownSels.o \
V3DfgRegularize.o \
V3DfgSynthesize.o \
V3DiagSarif.o \
V3DupFinder.o \
V3EmitCMain.o \
V3EmitCModel.o \
V3EmitCSyms.o \
V3EmitMk.o \
V3EmitMkJson.o \
V3ExecGraph.o \
V3Expand.o \
V3Force.o \
V3FsmDetect.o \
V3Fork.o \
V3Gate.o \
V3HierBlock.o \
V3Inline.o \
V3InlineCFuncs.o \
V3Inst.o \
V3InstrCount.o \
V3Interface.o \
V3LibMap.o \
V3Life.o \
V3LifePost.o \
V3LiftExpr.o \
V3LinkCells.o \
V3LinkDot.o \
V3LinkDotIfaceCapture.o \
V3LinkInc.o \
V3LinkJump.o \
V3LinkLValue.o \
V3LinkLevel.o \
V3LinkParse.o \
V3LinkResolve.o \
V3LinkWith.o \
V3Localize.o \
V3MergeCond.o \
V3Name.o \
V3Order.o \
V3OrderGraphBuilder.o \
V3OrderMoveGraph.o \
V3OrderMTaskContraction.o \
V3OrderMTaskFixHazards.o \
V3OrderMTaskGraph.o \
V3OrderParallel.o \
V3OrderProcessDomains.o \
V3OrderSerial.o \
V3Param.o \
V3PatternStats.o \
V3Premit.o \
V3ProtectLib.o \
V3RandSequence.o \
V3Randomize.o \
V3Reloop.o \
V3Reorder.o \
V3Sampled.o \
V3Sched.o \
V3SchedAcyclic.o \
V3SchedCovergroup.o \
V3SchedPartition.o \
V3SchedReplicate.o \
V3SchedTiming.o \
V3SchedTrigger.o \
V3SchedUtil.o \
V3SchedVirtIface.o \
V3Scope.o \
V3Slice.o \
V3Split.o \
V3SplitVar.o \
V3StackCount.o \
V3Subst.o \
V3Table.o \
V3Task.o \
V3Timing.o \
V3Trace.o \
V3TraceDecl.o \
V3Tristate.o \
V3Udp.o \
V3Undriven.o \
V3UndrivenCapture.o \
V3Unknown.o \
V3Unroll.o \
V3UnrollGen.o \
V3Width.o \
V3WidthCommit.o \
V3WidthSel.o \
# verilator_coverage
VLCOV_OBJS = \
VlcMain.o \
NON_STANDALONE_HEADERS = \
V3AstAttr.h \
V3AstInlines.h \
V3AstNodeDType.h \
V3AstNodeExpr.h \
V3AstNodeOther.h \
V3AstNodeStmt.h \
V3DebugBisect.h \
V3DfgVertices.h \
V3ThreadPool.h \
V3WidthRemove.h \
AST_DEFS := \
V3AstNodeDType.h \
V3AstNodeExpr.h \
V3AstNodeOther.h \
V3AstNodeStmt.h \
DFG_DEFS := \
V3DfgVertices.h
#### astgen common flags
ASTGENFLAGS = -I $(srcdir)
ASTGENFLAGS += $(foreach f,$(AST_DEFS),--astdef $f)
ASTGENFLAGS += $(foreach f,$(DFG_DEFS),--dfgdef $f)
#### Linking
ifeq ($(VL_VLCOV),)
PREDEP_H = V3Ast__gen_forward_class_decls.h
OBJS += $(RAW_OBJS) $(RAW_OBJS_PCH_ASTMT) $(RAW_OBJS_PCH_ASTNOMT)
else
PREDEP_H =
OBJS += $(VLCOV_OBJS)
endif
$(TGT): $(PREDEP_H) $(OBJS)
@echo " Linking $@..."
${LINK} ${LDFLAGS} -o $@ $(OBJS) $(CCMALLOC) ${LIBS}
#### Modules
%__gen.cpp: %.cpp $(ASTGEN) $(AST_DEFS) $(DFG_DEFS)
$(PYTHON3) $(ASTGEN) $(ASTGENFLAGS) $*.cpp
.SECONDARY:
%.gch: %
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSWALL} ${CFG_CXXFLAGS_PCH} -c $< -o $@
%.o: %.cpp
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSWALL} -c $< -o $@
V3ParseLex.o: V3ParseLex.cpp V3Lexer.yy.cpp V3ParseBison.c
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSPARSER} -c $< -o $@
V3ParseGrammar.o: V3ParseGrammar.cpp V3ParseBison.c
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSPARSER} -c $< -o $@
V3ParseImp.o: V3ParseImp.cpp V3ParseBison.c
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSPARSER} -c $< -o $@
V3PreProc.o: V3PreProc.cpp V3PreLex.yy.cpp
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSPARSER} -c $< -o $@
define CXX_ASTMT_template
$(1): $(basename $(1)).cpp V3PchAstMT.h.gch
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSWALL} ${CFG_CXXFLAGS_PCH_I} V3PchAstMT.h${CFG_GCH_IF_CLANG} -c $(srcdir)/$(basename $(1)).cpp -o $(1)
endef
$(foreach obj,$(RAW_OBJS_PCH_ASTMT),$(eval $(call CXX_ASTMT_template,$(obj))))
define CXX_ASTNOMT_template
$(1): $(basename $(1)).cpp V3PchAstNoMT.h.gch
$(OBJCACHE) ${CXX} ${CXXFLAGS} ${CXXFLAGSOBJ} ${CPPFLAGSWALL} ${CFG_CXXFLAGS_PCH_I} V3PchAstNoMT.h${CFG_GCH_IF_CLANG} -c $(srcdir)/$(basename $(1)).cpp -o $(1)
endef
$(foreach obj,$(RAW_OBJS_PCH_ASTNOMT),$(eval $(call CXX_ASTNOMT_template,$(obj))))
#### Generated files
# Target rule called before parallel build to make generated files
serial:: V3Ast__gen_forward_class_decls.h V3ParseBison.c
serial_vlcov:: vlcovgen.d
vlcovgen.d: $(VLCOVGEN) $(srcdir)/../include/verilated_cov_key.h
$(PYTHON3) $(VLCOVGEN) --srcdir $(srcdir)
touch $@
V3Ast__gen_forward_class_decls.h: $(ASTGEN) $(AST_DEFS) $(DFG_DEFS)
$(PYTHON3) $(ASTGEN) $(ASTGENFLAGS) --classes
V3ParseBison.h: V3ParseBison.c
# Have only one output file in this rule to prevent parallel make issues
V3ParseBison.c: verilog.y $(BISONPRE)
@echo "If you get errors from verilog.y below, try upgrading bison to version 1.875 or newer."
$(PYTHON3) $(BISONPRE) --yacc ${YACC} -d -v -o V3ParseBison.c $(BISON_DEBUG) $<
V3Lexer_pregen.yy.cpp: verilog.l V3ParseBison.h $(HEADERS)
${LEX} --version
${LEX} ${LFLAGS} -o$@ $<
V3Lexer.yy.cpp: V3Lexer_pregen.yy.cpp $(FLEXFIX)
$(PYTHON3) $(FLEXFIX) V3Lexer <$< >$@
V3PreLex_pregen.yy.cpp: V3PreLex.l $(HEADERS)
${LEX} --version
${LEX} ${LFLAGS} -o$@ $<
V3PreLex.yy.cpp: V3PreLex_pregen.yy.cpp $(FLEXFIX)
$(PYTHON3) $(FLEXFIX) V3PreLex <$< >$@
# For t_dist_header_cc
HEADER_CC_H := $(filter-out $(NON_STANDALONE_HEADERS), $(notdir $(wildcard $(srcdir)/*.h)))
.PHONY: header_cc
header_cc: $(addsuffix __header_cc.o, $(basename $(HEADER_CC_H)))
%__header_cc.cpp: %.h
$(PYTHON3) $(srcdir)/../bin/verilator_includer -DVL_MT_DISABLED_CODE_UNIT=1 $^ > $@
.SUFFIXES:
######################################################################
######################################################################
DEPS := $(wildcard *.d)
ifneq ($(DEPS),)
include $(DEPS)
endif
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