Bug#1022577: llvm-toolchain-15 fails with LLVM ERROR when using mesa

[Simon McVittie]

Control: retitle -1 llvm-toolchain-15: Mesa on armel,armhf fails with LLVM ERROR: Cannot select
Control: tags -1 + patch fixed-upstream

On Mon, 24 Oct 2022 at 12:45:01 +0300, Adrian Bunk wrote:
> https://buildd.debian.org/status/fetch.php?pkg=mutter&arch=armhf&ver=43.0-3&stamp=1666029584&raw=0
> 
> ...
> # Start of pipeline tests
> LLVM ERROR: Cannot select: 0x1300f80: v4i32 = ARMISD::VCMPZ 0x1301c70, Constant:i32<2>
>   0x1301c70: v4i32,ch = ARMISD::VLD1DUP<(load (s32) from %ir.212)> 0xdf9afc, 0x131c538:1, Constant:i32<4>
>     0x131c538: i32,i32,ch = load<(load (s32) from %ir.209, align 8), <post-inc>> 0xdf9afc, 0x12fb7e0, Constant:i32<64>
>       0x12fb7e0: i32,ch = CopyFromReg 0xdf9afc, Register:i32 %23
>         0x12e99c0: i32 = Register %23
>       0x131a9a8: i32 = Constant<64>
>     0x1319fd0: i32 = Constant<4>
>   0x131a2e8: i32 = Constant<2>
> In function: fs_variant_partial
> ...
> 
> 
> Some discussion is in
> https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-15/+bug/1993800

According to upstream bug <https://github.com/llvm/llvm-project/issues/58514>
this is fixed by commit
<https://github.com/llvm/llvm-project/commit/f970b007e55d6dab6d84d98a39658a58019eb06e>.

    smcv