[LLVMbugs] opt segfaults

Anthony Evans anthonyevans8475 at btinternet.com
Fri Apr 16 17:25:55 PDT 2004


I am using LLVM to compile some programs, and opt crashes reproducibly on  
some input. Here is the tail of the bugpoint output:

*** Attempting to perform final cleanups: Instruction does not dominate  
all uses!
         %tmp.171.i = seteq sbyte %tmp.9, 0              ; <bool> [#uses=3]
         %tmp.171.i.fw_frontier = phi bool [ %tmp.171.i,  
%shortcirc_next.3.i.endif.11.i_crit_edge ], [ %tmp.171.i.fw_merg
e1, %endif.11.i.then.13.i_crit_edge ]           ; <bool> [#uses=0]
Broken module found, compilation aborted!
bugpoint((anonymous namespace)::Verifier::abortIfBroken()+0x10a)[0x835848a]
Crashed with signal #6
Emitted bytecode to 'bugpoint-reduced-simplified.bc'

*** You can reproduce the problem with: opt bugpoint-reduced-simplified.bc  

This can be reproduced in 1.2 and in the current CVS (HEAD).

This is on Linux 2.6.5 (+ Andrew Morton's mm-6 patchset), glibc 2.3.3  
(+ NPTL patches) on an AMD Barton 3000+ with 2GB RAM.

gcc 3.3 and 3.4 (current CVS) and intel icc 8.0 can compile and optimise  
the code without problems on the same system.

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