40b91158c3
This patch combines basic blocks for static analysis of uninitialized variables providing that they are not the top of a loop, are not reached by a conditional and are not reached after a procedure call. It also avoids checking array accesses for static analysis. Finally the patch adds switch modifiers to allow static analysis to include conditional branches for subsequent basic block analysis. gcc/ChangeLog: * doc/gm2.texi (-Wuninit-variable-checking=) New item. gcc/m2/ChangeLog: * gm2-compiler/M2BasicBlock.def (InitBasicBlocksFromRange): New parameter ScopeSym. * gm2-compiler/M2BasicBlock.mod (ConvertQuads2BasicBlock): New parameter ScopeSym. (InitBasicBlocksFromRange): New parameter ScopeSym. Call ConvertQuads2BasicBlock with ScopeSym. (DisplayBasicBlocks): Uncomment. * gm2-compiler/M2Code.mod: Replace VariableAnalysis with ScopeBlockVariableAnalysis. (InitialDeclareAndOptiomize): Add parameter scope. (SecondDeclareAndOptimize): Add parameter scope. * gm2-compiler/M2GCCDeclare.mod (DeclareConstructor): Add scope parameter to DeclareTypesConstantsProceduresInRange. (DeclareTypesConstantsProceduresInRange): New parameter scope. Pass scope to DisplayQuadRange. Reformatted. * gm2-compiler/M2GenGCC.def (ConvertQuadsToTree): New parameter scope. * gm2-compiler/M2GenGCC.mod (ConvertQuadsToTree): New parameter scope. * gm2-compiler/M2Optimize.mod (KnownReachable): New parameter scope. * gm2-compiler/M2Options.def (SetUninitVariableChecking): Add arg parameter. * gm2-compiler/M2Options.mod (SetUninitVariableChecking): Add arg parameter and set boolean UninitVariableChecking and UninitVariableConditionalChecking. (UninitVariableConditionalChecking): New boolean set to FALSE. * gm2-compiler/M2Quads.def (IsGoto): New procedure function. (DisplayQuadRange): Add scope parameter. (LoopAnalysis): Add scope parameter. * gm2-compiler/M2Quads.mod: Import PutVarArrayRef. (IsGoto): New procedure function. (LoopAnalysis): Add scope parameter and use MetaErrorT1 instead of WarnStringAt. (BuildStaticArray): Call PutVarArrayRef. (BuildDynamicArray): Call PutVarArrayRef. (DisplayQuadRange): Add scope parameter. (GetM2OperatorDesc): Add relational condition cases. * gm2-compiler/M2Scope.def (ScopeProcedure): Add parameter. * gm2-compiler/M2Scope.mod (DisplayScope): Pass scopeSym to DisplayQuadRange. (ForeachScopeBlockDo): Pass scopeSym to p. * gm2-compiler/M2SymInit.def (VariableAnalysis): Rename to ... (ScopeBlockVariableAnalysis): ... this. * gm2-compiler/M2SymInit.mod (ScopeBlockVariableAnalysis): Add scope parameter. (bbEntry): New pointer to record. (bbArray): New array. (bbFreeList): New variable. (errorList): New list. (IssueConditional): New procedure. (GenerateNoteFlow): New procedure. (IssueWarning): New procedure. (IsUniqueWarning): New procedure. (CheckDeferredRecordAccess): Re-implement. (CheckBinary): Add warning and lst parameters. (CheckUnary): Add warning and lst parameters. (CheckXIndr): Add warning and lst parameters. (CheckIndrX): Add warning and lst parameters. (CheckBecomes): Add warning and lst parameters. (CheckComparison): Add warning and lst parameters. (CheckReadBeforeInitQuad): Add warning and lst parameters to all Check procedures. Add all case quadruple clauses. (FilterCheckReadBeforeInitQuad): Add warning and lst parameters. (CheckReadBeforeInitFirstBasicBlock): Add warning and lst parameters. (bbArrayKill): New procedure. (DumpBBEntry): New procedure. (DumpBBArray): New procedure. (DumpBBSequence): New procedure. (TestBBSequence): New procedure. (CreateBBPermultations): New procedure. (ScopeBlockVariableAnalysis): New procedure. (GetOp3): New procedure. (GenerateCFG): New procedure. (NewEntry): New procedure. (AppendEntry): New procedure. (init): Initialize bbFreeList and errorList. * gm2-compiler/SymbolTable.def (PutVarArrayRef): New procedure. (IsVarArrayRef): New procedure function. * gm2-compiler/SymbolTable.mod (SymVar): ArrayRef new field. (MakeVar): Set ArrayRef to FALSE. (PutVarArrayRef): New procedure. (IsVarArrayRef): New procedure function. * gm2-gcc/init.cc (_M2_M2SymInit_init): New prototype. (init_PerCompilationInit): Add call to _M2_M2SymInit_init. * gm2-gcc/m2options.h (M2Options_SetUninitVariableChecking): New definition. * gm2-lang.cc (gm2_langhook_handle_option): Add new case OPT_Wuninit_variable_checking_. * lang.opt: Wuninit-variable-checking= new entry. gcc/testsuite/ChangeLog: * gm2/switches/uninit-variable-checking/cascade/fail/cascadedif.mod: New test. * gm2/switches/uninit-variable-checking/cascade/fail/switches-uninit-variable-checking-cascade-fail.exp: New test. Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com> |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.