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1; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -mattr=+pacbti< %s | FileCheck %s2 3target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"4target triple = "thumbv8.1m.main-m.main-unknown"5 6; When PACBTI is enabled, indirect tail-calls must not use R12 that is used7; to store authentication code.8 9define void @pacbti_disabled(ptr %p) "sign-return-address"="none" {10entry:11 tail call void %p()12; CHECK: bx {{r0|r1|r2|r3|r12}}13 ret void14}15 16define void @pacbti_enabled(ptr %p) "sign-return-address"="all" {17entry:18 tail call void %p()19; CHECK: bx {{r0|r1|r2|r3}}20 ret void21}22 23define void @pacbti_disabled_force_r12(ptr %p) "sign-return-address"="none" {24entry:25 %p_r12 = tail call ptr asm "", "={r12},{r12},~{lr}"(ptr %p)26 tail call void %p_r12()27; CHECK: bx r1228 ret void29}30 31define void @pacbti_enabled_force_r12(ptr %p) "sign-return-address"="all" {32entry:33 %p_r12 = tail call ptr asm "", "={r12},{r12},~{lr}"(ptr %p)34 tail call void %p_r12()35; CHECK: bx {{r0|r1|r2|r3}}36 ret void37}38