[LLVMdev] Inline Assembly: Memory constraints with offsets

Krzysztof Parzyszek kparzysz at codeaurora.org
Thu Mar 5 07:05:01 PST 2015

On 3/4/2015 10:30 AM, Daniel Sanders wrote:
> Partial support for ZC is in my working copy at the moment. I've attached my WIP patches.

Should have guessed that, ha.

I've looked into this.  My idea was to expand the single address operand 
of the inline-asm SDNode into two: base pointer and offset.

I haven't found a place where all needed information would be readily 
available, and where the common code would do all the work based on some 
target-specific hook.  Failing that, my last resort approach would be to 
have a pre-isel pass that expands the inline-asm, potentially changing 
the constraints to reflect the connection between the register and the 
constant input operands (needed for the asm-printer).

Not sure if this is of any help.


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