[cfe-dev] How to add a new rewriting option
Vincent R.
forumer at smartmobili.com
Sun Jul 28 13:22:57 PDT 2013
Le 28.07.2013 19:31, Vincent R. a écrit :
> Le 28.07.2013 15:44, Vincent R. a écrit :
>> I have attached my latest patch(clang 3.3) below and I am wondering
>> if it wouldn't be easier to only modify the
>> RewriteObjc.cpp instead of trying to add a new rewriting option ...
>>
Ok so last question, actually I have noticed a big difference between
-rewrite-legacy-objc and -rewrite-objc because
when I try the two differents flags on the same file I get respectively
a file of 40.8 kB and another of 392.4 kB.
The difference seems to be because when using -rewrite-objc flag the
file is first preprocessed :
1) -rewrite-legacy-objc
clang -v -v -rewrite-legacy-objc NSButton.m -c -MMD -MP
-DGNUSTEP_TARGET_DIR=\".\" -DGNUSTEP_TARGET_CPU=\"x86_64\"
-DGNUSTEP_TARGET_OS=\"linux-gnu\" -DLIBRARY_COMBO=\"gnu-gnu-gnu\"
-DBACKEND_BUNDLE=1 -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1
-DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1
-fno-strict-aliasing -fexceptions -fobjc-exceptions
-D_NATIVE_OBJC_EXCEPTIONS -fobjc-nonfragile-abi -D_NONFRAGILE_ABI
-pthread -fPIC -DDEBUG -fno-omit-frame-pointer -Wall -DGSWARN
-DGSDIAGNOSE -Wno-import -g -fgnu-runtime -Wall
-fconstant-string-class=NSConstantString -I../Headers/Additions
-I../Headers -I./. -I. -I/home/vincent/GNUstep/Library/Headers
-I/GNUstep/Local/Library/Headers -I/GNUstep/System/Library/Headers
-I/usr/include/libpng12
clang version 3.3 (186145)
Target: x86_64-unknown-linux-gnu
Thread model: posix
**** File is transformed (-rewrite-objc)
"/opt/bin/clang-3.3" -cc1 -triple x86_64-unknown-linux-gnu
-rewrite-objc -disable-free -main-file-name NSButton.m
-mrelocation-model pic -pic-level 2 -mdisable-fp-elim -relaxed-aliasing
-fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables
-fuse-init-array -target-cpu x86-64 -v -v -g -coverage-file
/home/vincent/objc2cs/gnustep/core/gui/Source/NSButton.cpp -resource-dir
/opt/bin/../lib/clang/3.3 -dependency-file NSButton.d -MT NSButton.o -MP
-D "GNUSTEP_TARGET_DIR=\".\"" -D "GNUSTEP_TARGET_CPU=\"x86_64\"" -D
"GNUSTEP_TARGET_OS=\"linux-gnu\"" -D "LIBRARY_COMBO=\"gnu-gnu-gnu\"" -D
BACKEND_BUNDLE=1 -D GNUSTEP -D GNUSTEP_BASE_LIBRARY=1 -D
GNU_GUI_LIBRARY=1 -D GNU_RUNTIME=1 -D GNUSTEP_BASE_LIBRARY=1 -D
_NATIVE_OBJC_EXCEPTIONS -D _NONFRAGILE_ABI -D DEBUG -D GSWARN -D
GSDIAGNOSE -I ../Headers/Additions -I ../Headers -I ./. -I . -I
/home/vincent/GNUstep/Library/Headers -I /GNUstep/Local/Library/Headers
-I /GNUstep/System/Library/Headers -I /usr/include/libpng12
-internal-isystem /usr/local/include -internal-isystem
/opt/bin/../lib/clang/3.3/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -Wall -Wno-import -Wall
-fdebug-compilation-dir /home/vincent/objc2cs/gnustep/core/gui/Source
-fconstant-string-class NSConstantString -ferror-limit 19
-fmessage-length 232 -pthread -mstackrealign -fblocks
-fobjc-runtime=gnustep-1.6 -fobjc-dispatch-method=non-legacy
-fobjc-default-synthesize-properties -fno-objc-infer-related-result-type
-fobjc-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o NSButton.cpp -x
objective-c NSButton.m
2)-rewrite-objc
clang -v -v -rewrite-objc NSButton.m -c -MMD -MP
-DGNUSTEP_TARGET_DIR=\".\" -DGNUSTEP_TARGET_CPU=\"x86_64\"
-DGNUSTEP_TARGET_OS=\"linux-gnu\" -DLIBRARY_COMBO=\"gnu-gnu-gnu\"
-DBACKEND_BUNDLE=1 -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1
-DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1
-fno-strict-aliasing -fexceptions -fobjc-exceptions
-D_NATIVE_OBJC_EXCEPTIONS -fobjc-nonfragile-abi -D_NONFRAGILE_ABI
-pthread -fPIC -DDEBUG -fno-omit-frame-pointer -Wall -DGSWARN
-DGSDIAGNOSE -Wno-import -g -fgnu-runtime -Wall
-fconstant-string-class=NSConstantString -I../Headers/Additions
-I../Headers -I./. -I. -I/home/vincent/GNUstep/Library/Headers
-I/GNUstep/Local/Library/Headers -I/GNUstep/System/Library/Headers
-I/usr/include/libpng12
**** FIRST file is preprocessed(-E flag) :
"/opt/bin/clang-3.3" -cc1 -triple x86_64-unknown-linux-gnu -E
-disable-free -main-file-name NSButton.m -mrelocation-model pic
-pic-level 2 -mdisable-fp-elim -relaxed-aliasing -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array
-target-cpu x86-64 -v -v -g -coverage-file /tmp/NSButton-sxcmia.mi
-resource-dir /opt/bin/../lib/clang/3.3 -dependency-file NSButton.d -MT
NSButton.o -MP -D "GNUSTEP_TARGET_DIR=\".\"" -D
"GNUSTEP_TARGET_CPU=\"x86_64\"" -D "GNUSTEP_TARGET_OS=\"linux-gnu\"" -D
"LIBRARY_COMBO=\"gnu-gnu-gnu\"" -D BACKEND_BUNDLE=1 -D GNUSTEP -D
GNUSTEP_BASE_LIBRARY=1 -D GNU_GUI_LIBRARY=1 -D GNU_RUNTIME=1 -D
GNUSTEP_BASE_LIBRARY=1 -D _NATIVE_OBJC_EXCEPTIONS -D _NONFRAGILE_ABI -D
DEBUG -D GSWARN -D GSDIAGNOSE -I ../Headers/Additions -I ../Headers -I
./. -I . -I /home/vincent/GNUstep/Library/Headers -I
/GNUstep/Local/Library/Headers -I /GNUstep/System/Library/Headers -I
/usr/include/libpng12 -internal-isystem /usr/local/include
-internal-isystem /opt/bin/../lib/clang/3.3/include
-internal-externc-isystem /usr/include/x86_64-linux-gnu
-internal-externc-isystem /include -internal-externc-isystem
/usr/include -Wall -Wno-import -Wall -fdebug-compilation-dir
/home/vincent/objc2cs/gnustep/core/gui/Source -fconstant-string-class
NSConstantString -ferror-limit 19 -fmessage-length 232 -pthread
-mstackrealign -fblocks -fobjc-runtime=gnustep-1.6
-fobjc-dispatch-method=non-legacy -fobjc-default-synthesize-properties
-fobjc-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o
/tmp/NSButton-sxcmia.mi -x objective-c++-cpp-output NSButton.m
**** THEN file is transformed (-rewrite-objc)
"/opt/bin/clang-3.3" -cc1 -triple x86_64-unknown-linux-gnu
-rewrite-objc -disable-free -main-file-name NSButton.m
-mrelocation-model pic -pic-level 2 -mdisable-fp-elim -relaxed-aliasing
-fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables
-fuse-init-array -target-cpu x86-64 -v -v -g -coverage-file
/home/vincent/objc2cs/gnustep/core/gui/Source/NSButton.cpp -resource-dir
/opt/bin/../lib/clang/3.3 -Wall -Wno-import -Wall
-fdebug-compilation-dir /home/vincent/objc2cs/gnustep/core/gui/Source
-fconstant-string-class NSConstantString -ferror-limit 19
-fmessage-length 232 -pthread -mstackrealign -fblocks
-fobjc-runtime=gnustep-1.6 -fobjc-dispatch-method=non-legacy
-fobjc-default-synthesize-properties -fno-objc-infer-related-result-type
-fobjc-exceptions -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -backend-option -vectorize-loops -o NSButton.cpp -x
objective-c++-cpp-output /tmp/NSButton-sxcmia.mi
Is is a normal behavior to have a difference in preprocessing between
-rewrite-legacy-objc and -rewrite-objc or is it one of my change that
could explain it ?
What part of code is responsible for that ?
With my new flag -rewrite-objc2cs I don't want to have a preprocessing
stage but I don't know how to do it ?
If you have any pointers about this part, it would help a lot.
Pleas note that for the moment the RewriteObjC2Cs.cpp is a copy of
RewriteObjC.cpp and I am calling a method called CreateObjC2CsRewriter
that actually corresponds to the CreateObjCRewriter (fragile runtime)
of the RewriteObjC.cpp
ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile,
"cpp")) {
if (CI.getLangOpts().ObjCRuntime.isNonFragile())
return CreateModernObjCRewriter(InFile, OS,
CI.getDiagnostics(), CI.getLangOpts(),
CI.getDiagnosticOpts().NoRewriteMacros,
(CI.getCodeGenOpts().getDebugInfo() !=
CodeGenOptions::NoDebugInfo));
return CreateObjCRewriter(InFile, OS,
CI.getDiagnostics(), CI.getLangOpts(),
CI.getDiagnosticOpts().NoRewriteMacros);
}
return 0;
}
ASTConsumer *RewriteObjC2CsAction::CreateASTConsumer(CompilerInstance
&CI,
StringRef InFile) {
if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile,
"cs")) {
return CreateObjC2CsRewriter(InFile, OS,
CI.getDiagnostics(), CI.getLangOpts(),
CI.getDiagnosticOpts().NoRewriteMacros);
}
return 0;
}
Thanks
More information about the cfe-dev
mailing list