RFR: 8075930: AARCH64: Use FP Register in C2

Edward Nevill edward.nevill at linaro.org
Fri Apr 10 08:54:59 UTC 2015

Hi Vladimir,

On Thu, 2015-04-09 at 10:32 -0700, Vladimir Kozlov wrote:
> Hi Edward,
> In frame() I think check !defined(COMPILER2) is useless because COMPILER2 is always defined in 64-bit Server Hotspot VM. 
> Unless you have configuration without C2. I think it should be dynamic check after you find who generated this _cb.
> Can you explain what this code does (there is not comment):

We do build without C2 as part of our testing. However, as Andrew Haley said, this is old debug code, so I propose simply removing it. Its usefulness is rather limited once fp can be allocated as a general purpose register.

>    80 #ifndef PRODUCT
>    81   if (fp)
>    82     if (sp > fp || (fp - sp > 0x100000))
>    83       for(;;)
>    84         asm("nop");
>    85 #endif

New webrev removing this code @


All the best,

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