[Bug rtl-optimization/51771] trans-mem: abnormal edges get lost or corrupted

[torvald at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51771

--- Comment #3 from torvald at gcc dot gnu.org 2012-01-31 13:20:32 UTC ---
Created attachment 26532
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26532
test for false returns-twice warning

Attached a test that triggers a false warning due to the returns-twice hack
when -Wclobbered is used.  The transactions roll back updates properly.