[Bug middle-end/32769] __builtin_eh_return broken by dataflow merge

[danglin at gcc dot gnu dot org]

------- Comment #3 from danglin at gcc dot gnu dot org  2007-07-14 20:15 -------
The MEM in insn 54 arises from the definition of EH_RETURN_HANDLER_RTX:

#define EH_RETURN_HANDLER_RTX \
  gen_rtx_MEM (word_mode,                                               \
               gen_rtx_PLUS (word_mode, frame_pointer_rtx,              \
                             TARGET_64BIT ? GEN_INT (-16) : GEN_INT (-20)))

See in df-scan.c that this rtx is added to exit_block_uses when it is
a REG.  However, we seem to be in trouble when it is a MEM.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32769