[Bug c/33949] gcc-4.2.2 generates bad code on ARM

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2007-10-30 15:54 -------
It doesn't matter that you store the address of param to a volatile variable
(this store is not removed), but that

              DMA_ADDR_REG = (unsigned long) data;

does not make the stack local live longer than the frame of outer_func and
*data is not used after the assignment.  Probably your code kicking off
the DMA engine lacks a memory barrier and a use of DMA_ADDR_REG.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33949