[LLVMdev] Problems with 64-bit register operands of inline asm on ARM

Jakob Stoklund Olesen stoklund at 2pi.dk
Wed Mar 13 10:57:51 PDT 2013

On Mar 13, 2013, at 10:03 AM, Weiming Zhao <weimingz at codeaurora.org> wrote:

> Hi  Måns,
> Always forcing 64-bit operands into even/odd pairs may lead to subpoptimal
> register allocation because not all 64 bit data requires paired regs. It
> seems there is no general pattern to match. Maybe we should treat it case by
> case.
> Jakob, do you have any suggestions?

I'm not sure I understand. How does one use unpaired registers in inline asm? Could you give an example?


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