[llvm-dev] llc error

[Charith Mendis via llvm-dev]

I am using r275888. Was there an easy fix for this?

I forked this version to a git repo and developing on it.

On Sat, Sep 3, 2016 at 2:09 AM, Craig Topper <craig.topper at gmail.com> wrote:

> What version of llvm are you using? This test doesn't fail on my trunk
> build. But if you're using an older version I can try to see what changed
> to fix this.
>
> ~Craig
>
> On Fri, Sep 2, 2016 at 10:53 PM, Charith Mendis via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>>
>> Hi all,
>>
>> The attached LLVM assembly file fails to generate x86 code when compiled
>> using llc.
>>
>> compilation command - ../llvm-build/bin/llc -filetype=asm -march=x86-64
>> -mcpu=core-avx2 ex4.ll
>>
>> The error message is,
>>
>> LLVM ERROR: Cannot select: t95: v8f32 = X86ISD::SUBV_BROADCAST t17
>>   t17: v4f32,ch = load<LD16[%scevgep](tbaa=<0x4dbcd98>)> t0, t16,
>> undef:i64
>>     t16: i64 = add t2, Constant:i64<16>
>>       t2: i64,ch = CopyFromReg t0, Register:i64 %vreg5
>>         t1: i64 = Register %vreg5
>>       t15: i64 = Constant<16>
>>     t4: i64 = undef
>> In function: _ZN10soundtouch12TDStretchSSE13calcCrossCorrEPKfS2_Rd
>>
>>
>> I dug into the LLVM assembly file and found out that the error is caused
>> by the following 2 lines (Line 89 and 90).
>>
>> %8 = shufflevector <4 x float> %6, <4 x float> %6, <8 x i32> <i32 0, i32
>> 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
>>   %9 = shufflevector <4 x float> %6, <4 x float> %7, <8 x i32> <i32 0,
>> i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
>>
>> Could anyone help me understand what this error is?
>>
>> Your help will be highly appreciated.
>>
>> --
>> Kind regards,
>> Charith Mendis
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
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>>
>>
>


-- 
Kind regards,
Charith Mendis

FInal Year Undergraduate,
Electronics and Telecommunication Dept,
University of Moratuwa.
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