[Bug rtl-optimization/54783] [4.8 Regression] valgrind reports using uninitialised data in mark_pseudo_regno_live and make_object_born on basic code

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54783

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-10-03 06:54:22 UTC ---
Alternative would be to check for valgrind devel headers always, tweak the
existing VALGRIND* macros used in gcc sources such that it would be only used
if ENABLE_VALGRIND_CHECKING (otherwise expand to nothing) and in sparseset for
hosts that have valgrind support, but no valgrind devel headers, fall back to
XCNEWVEC, otherwise if valgrind devel headers are available, use the valgrind
special insn even without --enable-checking=valgrind.