review (S) for

Tom Rodriguez tom.rodriguez at
Wed Dec 15 15:22:03 PST 2010



On Dec 15, 2010, at 3:20 PM, Vladimir Kozlov wrote:

> Tom Rodriguez wrote:
>> On Dec 15, 2010, at 2:50 PM, Vladimir Kozlov wrote:
>>> What could be the case when assigned_regHi() == -1 but assigned_reg() != -1 (num == 2)?
>> alloc_free_reg may not be able to get both registers for a pair and it leaves the interval with the first reg set but regHi is still -1.  Then it goes to do some spilling to free a register for the second part. If you try to print it during this part you'll assert.
> Got it. Changes looks good.
> Thansk,
> Vladimir
>> tom
>>> Vladimir
>>> Tom Rodriguez wrote:
>>>> 6579789: Internal error "c1_LinearScan.cpp:1429 Error: assert(false,"")" in debuggee with fastdebug VM
>>>> Reviewed-by:
>>>> When using the x86 FPU, spilling at an exception entry point may
>>>> mutate the intervals so that _sorted_intervals is no longer sorted.
>>>> The fix is detect this case and resort as needed.  Additionally I
>>>> added some more assertion checks and fixed a printing problem that
>>>> would assert on partially allocated intervals.  Tested with new test
>>>> case and CTW.

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