nickdesaulniers added a comment. In D110065#3033050 <https://reviews.llvm.org/D110065#3033050>, @labrinea wrote:
> That said my current approach will be breaking the current tools behavior: > when the user only specifies the triple and not -march then they will be > targeting the intersection, not v8-a. For the purposes of compiling the linux kernel, for the `ARCH=arm64` port, we always pass `-Wa,-march=armv8.5-a` but not `-march=`. While it's trivial to add it to the kernel Makefiles, I worry if this causes clang's behavior to differ significantly from GCC. Does GCC support the R profile? > The impact is not expected to be significant as the missing instructions > (smc, dcps3) were not being generated anyway. I can see in the kernel sources that hypervisor code in KVM is using `smc` instructions. `kvm/hyp/hyp-entry.S` Since we're passing `-Wa,-march=`, I suspect with your patch we'd be fine. CHANGES SINCE LAST ACTION https://reviews.llvm.org/D110065/new/ https://reviews.llvm.org/D110065 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
