--- Comment #1 from davem at gcc dot gnu dot org 2010-02-09 22:08 ---
Ok, I now know a lot more about this bug. It's effects were masked
before gcc-4.4 because we used to have the TFmode secondary reload
slot in every stack frame. That got removed by my commit:
2009-01-04 David S.
--- Comment #2 from davem at gcc dot gnu dot org 2010-02-09 22:13 ---
Reading further, the Sparc 64-bit ABI requires that the every stack frame
be 16 byte aligned. And if that were the case this problem would never
happen.
Will try to determine how the stack is becomming only 8-byte
--- Comment #3 from davem at gcc dot gnu dot org 2010-02-10 00:49 ---
I've root caused this to the Linux kernel not 16-byte aligning thread
stacks when using the clone() system call (it was enforcing only 8-byte
alignment), and also signal stacks.
The seconday mem TFmode stack slot was
