On 09/01/18 17:57, Bernd Edlinger wrote: > On 01/09/18 18:50, Richard Earnshaw (lists) wrote: >> On 09/01/18 17:36, Bernd Edlinger wrote: >>> Richard Earnshaw wrote: >>> > Let me give an example, we use the generic code expansion if we >>> > encounter the builtin when generating code for Thumb on pre-ARMv7 >>> > devices. We don't have instructions in 'thumb1' to guard against >>> > speculation and we really want to warn users that they've done this (it >>> > might be a mistake in how they're invoking the compiler). >>> >>> Instead of this warning in one of the unsupported cases, could you use >>> the DSB SYS + ISB barrier as the white paper suggests? >>> >>> >>> Bernd. >> >> Thumb1 doesn't have those instructions. >> > > Ah, well, and in the case mode == TImode ? > > Bernd.
I don't think we can ever get a TImode integral type on AArch32. Perhaps we should just ICE in that case... R.
