MaskRay added inline comments.
================
Comment at: llvm/lib/Target/RISCV/RISCVFrameLowering.cpp:58
const auto *RVFI = MF.getInfo<RISCVMachineFunctionInfo>();
if (RVFI->useSaveRestoreLibCalls(MF)) {
----------------
paulkirth wrote:
> craig.topper wrote:
> > paulkirth wrote:
> > > craig.topper wrote:
> > > > Can you add a FIXME here? Using x27 should hopefully remove this
> > > > restriction
> > > I've added the FIXME, but do we just want to remove this now? or is there
> > > some issues or chang under review I can ref in the FIXME?
> > We can remove it, but we should add a test for it.
> That makes sense. Thanks.
Nit: Drop the period while updating the message. See
https://llvm.org/docs/CodingStandards.html#error-and-warning-messages
================
Comment at: llvm/lib/Target/RISCV/RISCVFrameLowering.cpp:116
Ctx.diagnose(DiagnosticInfoUnsupported{
- MF.getFunction(), "x18 not reserved by user for Shadow Call Stack."});
- return;
- }
-
- const auto *RVFI = MF.getInfo<RISCVMachineFunctionInfo>();
- if (RVFI->useSaveRestoreLibCalls(MF)) {
- Ctx.diagnose(DiagnosticInfoUnsupported{
- MF.getFunction(),
- "Shadow Call Stack cannot be combined with Save/Restore LibCalls."});
+ MF.getFunction(), "x27 not reserved by user for Shadow Call Stack."});
return;
----------------
Nit: Drop the period while updating the message. See
https://llvm.org/docs/CodingStandards.html#error-and-warning-messages
================
Comment at: llvm/test/CodeGen/RISCV/saverestore-scs.ll:1
+; Check that shadow call stack doesn't interfere with save/restore
+
----------------
`;; ` appears a useful prefix to highlight non-RUN-non-CHECK comments. It also
makes it clear `Check` is not a typo for `CHECK:` when we have some automation
tools to detect stale CHECK lines.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D146463/new/
https://reviews.llvm.org/D146463
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