Displaying 5 results from an estimated 5 matches for "cfguard".
2020 Mar 27
5
Passing inormation from pass to lowering
Hi!
I have written a ModulePass that calculates various things and adds custom metadata attributes to certain instructions. Depending on the attributes, I would like to change the machine code of these instructions. For example, I would like to replace certain calls with jumps, but as far as I can tell the IR metadata is not accessible anymore on the level of machine instructions (e.g. in the
2020 Jan 15
2
Encode target-abi into LLVM bitcode for LTO.
...erstand/explain
> that, as it may help inform the design here?
>
>
I grep "addModuleFlag" in clang and list all module level metadata:
"NumRegisterParameters": implement __attribute((regparm(3))) which is x86
specific feature and used in X86TargetLowering phase.
"cfguard": implement Control Flow Guard (Check mechanism) in IR level pass.
"StrictVTablePointers", "StrictVTablePointersRequirement": there is no code
use this info in llvm source tree
"min_enum_size", "wchar_size": indicate C type size, ARMAsmPrinter use it
to...
2020 Jan 27
2
Encode target-abi into LLVM bitcode for LTO.
...form the design here?
> >
> > I grep "addModuleFlag" in clang and list all module level metadata:
> >
> > "NumRegisterParameters": implement __attribute((regparm(3))) which is
> x86 specific feature and used in X86TargetLowering phase.
> > "cfguard": implement Control Flow Guard (Check mechanism) in IR level
> pass.
> > "StrictVTablePointers", "StrictVTablePointersRequirement": there is no
> code use this info in llvm source tree
> > "min_enum_size", "wchar_size": indicate C type...
2020 Jan 27
2
Encode target-abi into LLVM bitcode for LTO.
...> > I grep "addModuleFlag" in clang and list all module level metadata:
>>> >
>>> > "NumRegisterParameters": implement __attribute((regparm(3))) which is
>>> x86 specific feature and used in X86TargetLowering phase.
>>> > "cfguard": implement Control Flow Guard (Check mechanism) in IR level
>>> pass.
>>> > "StrictVTablePointers", "StrictVTablePointersRequirement": there is no
>>> code use this info in llvm source tree
>>> > "min_enum_size", "wc...
2020 Jan 13
2
Encode target-abi into LLVM bitcode for LTO.
David Blaikie via llvm-dev <llvm-dev at lists.llvm.org> 於 2020年1月11日 週六
上午2:03寫道：
> Ah, OK - thanks for walking me through that.
>
> Fair enough, I think I understand the issue/tradeoff now - and that the
> other module level metadata don't currently influence the target
> configuration at this level?
>
>
I'm not sure, I only know that the target-abi is decided