On 11 September 2012 09:46, Michael Hope <michael.h...@linaro.org> wrote:
> On 10 September 2012 18:47, Zhenqiang Chen <zhenqiang.c...@linaro.org> wrote:
>> Summary:
>> * Test shrink-wrap code
>>
>> Details:
>> 1. Add simple_return support in function thumb2_expand_return for
>> shrink-wrap. Here is the make check status
>> * One new fail is due to code size increase. We'd disable it when
>> optimizing function for size on THUMB2.
>> * Other new fails is due to dwarf info. Root cause is ICE at function
>> maybe_record_trace_start
>>
>> gcc_checking_assert (cfi_row_equal_p (cur_row, ti->beg_row));
>>
>> Here is the failed code segment:
>>
>> tst ... L1
>> push {r4}
>> ...
>> ldr r4, ...
>> L1:
>> bx lr // common simple return from two branches.
>
> Hmm, any chance of a conditional return instead in the future?
ARM mode had supported conditional return. We can update current
patterns or add new instruction patterns to support it for THUMB mode.
I will work on it later.
Thanks!
-Zhenqiang
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