[llvm] 43f4c21 - [AArch64][KCFI] Define Size for KCFI_CHECK

[Sami Tolvanen via llvm-commits]

Author: Sami Tolvanen
Date: 2022-10-05T22:24:50Z
New Revision: 43f4c215a1a2c12851853b1ed4cc0864387b5a74

URL: https://github.com/llvm/llvm-project/commit/43f4c215a1a2c12851853b1ed4cc0864387b5a74
DIFF: https://github.com/llvm/llvm-project/commit/43f4c215a1a2c12851853b1ed4cc0864387b5a74.diff

LOG: [AArch64][KCFI] Define Size for KCFI_CHECK

Specify the correct size for the KCFI_CHECK pseudo
instruction, which is lowered into six 4-byte instructions in
AArch64AsmPrinter::LowerKCFI_CHECK.

Link: https://github.com/ClangBuiltLinux/linux/issues/1730

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AArch64InstrInfo.td

Removed: 
    


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diff  --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
index 2b2700dd98f3..3b7e5524f6c9 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -1452,7 +1452,8 @@ def : Pat<(AArch64mrs imm:$id),
 def MOVbaseTLS : Pseudo<(outs GPR64:$dst), (ins),
                        [(set GPR64:$dst, AArch64threadpointer)]>, Sched<[WriteSys]>;
 
-let Defs = [ X9, X16, X17, NZCV ] in {
+// This gets lowered into a 24-byte instruction sequence
+let Defs = [ X9, X16, X17, NZCV ], Size = 24 in {
 def KCFI_CHECK : Pseudo<
   (outs), (ins GPR64:$ptr, i32imm:$type), []>, Sched<[]>;
 }