[PATCH] D93298: [RISCV] add the MC layer support of Zfinx extension

[Craig Topper via Phabricator via cfe-commits]

craig.topper added a comment.

In D93298#3355088 <https://reviews.llvm.org/D93298#3355088>, @craig.topper wrote:

> In D93298#3354313 <https://reviews.llvm.org/D93298#3354313>, @krasimir wrote:
>
>> @achieveartificialintelligence thank you for looking into this, sorry for the late reply!
>>
>> It looks like the latest version addresses @nikic's IR reproducer with `-mtriple=riscv32`.
>>
>> There seems to be an error trying this out with `-mtriple=riscv64`:
>>
>>   % cat test.ll
>>   define float @test(float %x) {
>>     %1 = tail call float asm sideeffect alignstack "mv a0, a0", "={x10},{x10}"(float 0.000000e+00)
>>     ret float 0.000000e+00
>>   }
>>   % llc -mtriple=riscv32 -mattr=+d test.ll
>>   % llc -mtriple=riscv64 -mattr=+d test.ll
>>   error: couldn't allocate output register for constraint '{x10}'
>>
>> I'm not sure if this is intended to work `-mtriple=riscv64`, but judging by the newly added test `RUN: llc -mtriple=riscv64 ...` line it seems like it should?
>
> My patch was only partially correct. I'll fix it

I just pushed 6cb42cd6669785f3b611106e1b6b38bbe65733a9 <https://reviews.llvm.org/rG6cb42cd6669785f3b611106e1b6b38bbe65733a9> to hopefully fix this.


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