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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/106568] -freorder-blocks-algorithm appears to
 causes a crash in stable code, no way to disable it
Date: Tue, 06 Feb 2024 20:20:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106568

--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 57344
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57344&action=3Dedit
Gzipped preprocessed source

With -O2 -fsantiize=3Dunreachable this prints an error:

pubkey.h:2209:32: runtime error: execution reached an unreachable program p=
oint

That happens from the constructor at validat9.cpp:455=20

#0=20
CryptoPP::PK_FinalTemplate<CryptoPP::DL_VerifierImpl<CryptoPP::DL_Signature=
SchemeOptions<CryptoPP::DL_SS<CryptoPP::DL_Keys_ECGDSA<CryptoPP::ECP>,
CryptoPP::DL_Algorithm_ECGDSA<CryptoPP::ECP>,
CryptoPP::DL_SignatureMessageEncodingMethod_DSA, CryptoPP::SHA1, int>,
CryptoPP::DL_Keys_ECGDSA<CryptoPP::ECP>,
CryptoPP::DL_Algorithm_ECGDSA<CryptoPP::ECP>,
CryptoPP::DL_SignatureMessageEncodingMethod_DSA, CryptoPP::SHA1> >
>::PK_FinalTemplate (algorithm=3D..., this=3D0x7fffffffc7d0) at
/tmp/cryptopp/cryptlib.h:2626
#1  CryptoPP::Test::ValidateECGDSA (thorough=3Dthorough@entry=3Dtrue) at
validat9.cpp:455
#2  0x000000000043448f in CryptoPP::Test::Validate (alg=3D<optimized out>,
thorough=3Dthorough@entry=3Dtrue) at test.cpp:995
#3  0x000000000043a303 in CryptoPP::Test::scoped_main (argc=3D3,
argv=3D0x7fffffffd6b8) at test.cpp:401
#4  0x000000000043aaf3 in main (argc=3D<optimized out>, argv=3D<optimized o=
ut>) at
test.cpp:1094


I don't see anything obviously wrong with the code.=