[PATCH] D84502: [AArch64][GlobalISel] Implement __builtin_return_address for PAC-RET

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


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Comment at: llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp:4796
+        Register TmpReg = MRI.createVirtualRegister(&AArch64::GPR64RegClass);
+        MIRBuilder.buildCopy({TmpReg}, {LiveInLR});
+        MIRBuilder.buildInstr(AArch64::XPACI, {DstReg}, {TmpReg});
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Why do you need this temporary copy?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D84502/new/

https://reviews.llvm.org/D84502