* reload question - the compiler fails to find register to spill in a class
@ 2008-01-10 13:40 Tomer Benyamini
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From: Tomer Benyamini @ 2008-01-10 13:40 UTC (permalink / raw)
To: 'gcc@gcc.gnu.org'
Hi,
I'm developing a gcc based compiler and in a certain scenario I get the following reload crash:
"error: unable to find a register to spill in class 'AB_REGS'"
I looked into it and it looks like it happens when all the AB_REGS registers are taken as function arguments, and the prefered class in a certain insn for a pseudo register is AB_REGS. This despite the fact that an alternative that includes GENERAL_REGS (r) has been chosen for that insn.
Why does reload crash and doesn't try to use other registers from GENERAL_REGS class?
What is the correct way to handle this problem?
Thanks,
Tomer
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2008-01-10 13:40 reload question - the compiler fails to find register to spill in a class Tomer Benyamini
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