[llvm-dev] Assertion fail/crash in X86FrameLowering::GetFrameIndexReference SEH

[Carlo Kok via llvm-dev]

Thanks!

On 2016-10-19 19:19, Reid Kleckner wrote:
> Should be fixed in r284612
>
> On Wed, Oct 19, 2016 at 10:00 AM, Reid Kleckner <rnk at google.com
> <mailto:rnk at google.com>> wrote:
>
>     I think r262546 introduced the assumption that allocas are used
>     exactly once with catchpad. It seems easy to fix, though.
>
>     On Mon, Oct 17, 2016 at 11:51 PM, Carlo Kok via llvm-dev
>     <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>
>         This turned out to be related to reusing the local used in the
>         catchpad, for example given the following c++ code:
>
>         extern void rthrow();
>
>         int main() {
>             try
>             {
>                 try {
>                     rthrow();
>                 } catch(int* v) {
>                     rthrow();
>                 }
>             } catch (int* v)
>             {
>                 rthrow();
>             }
>             return 0;
>         }
>
>         Generates two:
>
>           %7 = catchpad within %5 [%rtti.TypeDescriptor4*
>         @"\01??_R0PAH at 8", i32 0, i32** %2]
>           %11 = catchpad within %9 [%rtti.TypeDescriptor4*
>         @"\01??_R0PAH at 8", i32 0, i32** %3]
>
>         If I change either of them to have the %2 in both, it crashes llvm.
>
>
>         On 2016-10-17 18:02, Carlo Kok via llvm-dev wrote:
>
>             Hi,
>
>             I'm gettign an assertion fail/crash in
>             X86FrameLowering::GetFrameIndexReference when compiling the
>             following
>             bitcode:
>
>             https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0
>             <https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0>
>
>             I tried removing the llvm.frameaddres calls but that's not
>             it, where can
>             I start looking for what my mistake here is? Code seems to
>             verify just
>             fine.
>
>
>             ; #0 0x00e1afe8
>             llvm::X86FrameLowering::getFrameIndexReference(class
>             llvm::MachineFunction const &,int,unsigned int &)const
>             c:\p\llvm\llvm\lib\target\x86\x86framelowering.cpp:1672:0
>             ; #1 0x00f99010
>             llvm::WinException::getFrameIndexOffset(int,struct
>             llvm::WinEHFuncInfo const &)
>             c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:320:0
>             ; #2 0x00f97f75
>             llvm::WinException::emitCXXFrameHandler3Table(class
>             llvm::MachineFunction const *,bool)
>             c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:805:0
>             ; #3 0x00f98e77 llvm::WinException::endFunction(class
>             llvm::MachineFunction const *)
>             c:\p\llvm\llvm\lib\codegen\asmprinter\winexception.cpp:146:0
>             ; #4 0x00f685f7 llvm::AsmPrinter::EmitFunctionBody(void)
>             c:\p\llvm\llvm\lib\codegen\asmprinter\asmprinter.cpp:978:0
>             ; #5 0x00d307fa llvm::X86AsmPrinter::runOnMachineFunction(class
>             llvm::MachineFunction &)
>             c:\p\llvm\llvm\lib\target\x86\x86asmprinter.cpp:73:0
>             ; #6 0x01021d1b llvm::MachineFunctionPass::runOnFunction(class
>             llvm::Function &)
>             c:\p\llvm\llvm\lib\codegen\machinefunctionpass.cpp:64:0
>             ; #7 0x011a8f40 llvm::FPPassManager::runOnFunction(class
>             llvm::Function
>             &) c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1522:0
>             ; #8 0x011a9083 llvm::FPPassManager::runOnModule(class
>             llvm::Module &)
>             c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1542:0
>             ; #9 0x011a9202 `anonymous
>             namespace'::MPPassManager::runOnModule
>             c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1599:0
>             ; #10 0x011a8b49 llvm::legacy::PassManagerImpl::run(class
>             llvm::Module
>             &) c:\p\llvm\llvm\lib\ir\legacypassmanager.cpp:1703:0
>             ; #11 0x00aee750 compileModule
>             c:\p\llvm\llvm\tools\llc\llc.cpp:508:0
>             ; #12 0x00af2e2a main c:\p\llvm\llvm\tools\llc\llc.cpp:273:0
>             ; #13 0x015b7e28 _scrt_common_main_seh
>             f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253:0
>             ; #14 0x769e62c4 (C:\WINDOWS\System32\KERNEL32.DLL+0x162c4)
>             ; #15 0x772f0609 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x60609)
>             ; #16 0x772f05d4 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x605d4)
>
>
>             bitcode:
>             https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0
>             <https://gist.github.com/carlokok/868cddebeb9acc8ccbac6253de0480b0>
>
>
>         --
>         Carlo Kok
>         RemObjects Software
>         _______________________________________________
>         LLVM Developers mailing list
>         llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>
>         http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>         <http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>
>
>
>

-- 
Carlo Kok
RemObjects Software