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spudagtodagisel
2009 Mar 19
0
[LLVMdev] byte store requires read-modify-write sequence
Hi,
> Our processor only does 32bit reads and writes to memory. Changing a
> byte requires a 32bit read, modify, 32bit write sequence to change the
> 8bit value in memory.
>
> How should this be handled?
your backend will have i32 as a legal type and i8 as an illegal type.
A store to an i8 will be automatically transformed into a "truncating"
to i8 store of i32.
2009 Mar 19
2
[LLVMdev] byte store requires read-modify-write sequence
Our processor only does 32bit reads and writes to memory. Changing a
byte requires a 32bit read, modify, 32bit write sequence to change the
8bit value in memory.
How should this be handled?
Do any of the other current backends do this?