[PATCH] D140045: [X86] Move RDFLAGS/WRFLAGS expansion until after RA

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added inline comments.


================
Comment at: llvm/lib/Target/X86/X86InstrInfo.cpp:5075-5076
+            get(Is64Bit ? X86::PUSHF64 : X86::PUSHF32))
+        .addReg(X86::EFLAGS, RegState::Undef)
+        .addReg(X86::DF, RegState::Undef);
+    MIB->setDesc(get(Is64Bit ? X86::POP64r : X86::POP32r));
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pengfei wrote:
> void wrote:
> > arsenm wrote:
> > > Are these not reserved?
> > Dunno. I'm going off of what the original code was doing...
> I think this might be a problem for PostRA.
Sorry, I misunderstood the question. Please ignore.


Repository:
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CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D140045/new/

https://reviews.llvm.org/D140045