[cfe-dev] Over-aligned vst1.64 and vld1.64 for arm-linux-androideabi

[Greg McGary via cfe-dev]

On Wed, Feb 14, 2018 at 12:44 PM, Friedman, Eli <efriedma at codeaurora.org>
wrote:

>
> There are three forms of vld1.64 which load two registers (encoding
> comments generated using "llvm-mc --arch=arm -mattr=+neon -show-encoding"):
>
>         vld1.64 {d16, d17}, [r2]!       @ encoding: [0xcd,0x0a,0x62,0xf4]
>         vld1.64 {d16, d17}, [r2:64]!    @ encoding: [0xdd,0x0a,0x62,0xf4]
>         vld1.64 {d16, d17}, [r2:128]!   @ encoding: [0xed,0x0a,0x62,0xf4]
>
> The first requires no alignment, the second requires 64-bit alignment, the
> third requires 128-bit alignment.


I see the first form (no alignment) from "clang -S ..."
When I compile to object via "clang -c ...", subsequent disassembly shows
the third form (128-bit alignment).
What's up with that?

G
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