Re: [Activity] Week 36

On 11 September 2012 09:46, Michael Hope michael.hope@linaro.org wrote:

On 10 September 2012 18:47, Zhenqiang Chen zhenqiang.chen@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