TheRock/compiler/amd-llvm/llvm/test/CodeGen/AArch64/speculation-hardening-sls.mir

# RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu \
# RUN:     -start-before aarch64-sls-hardening -o - %s \
# RUN:     -mattr=+pauth,+harden-sls-retbr \
# RUN:   | FileCheck %s --check-prefixes=CHECK,ISBDSB
# RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu \
# RUN:     -start-before aarch64-sls-hardening -o - %s \
# RUN:     -mattr=+pauth,+harden-sls-retbr -mattr=+sb \
# RUN:   | FileCheck %s --check-prefixes=CHECK,SB

# Check that the SLS hardening pass also protects BRA* indirect branches that
# llvm currently does not generate.
--- |
  @ptr_aa = private unnamed_addr constant [2 x ptr] [ptr blockaddress(@br_aa, %return), ptr blockaddress(@br_aa, %l2)], align 8
  @ptr_aaz = private unnamed_addr constant [2 x ptr] [ptr blockaddress(@br_aaz, %return), ptr blockaddress(@br_aaz, %l2)], align 8
  @ptr_ab = private unnamed_addr constant [2 x ptr] [ptr blockaddress(@br_ab, %return), ptr blockaddress(@br_ab, %l2)], align 8
  @ptr_abz = private unnamed_addr constant [2 x ptr] [ptr blockaddress(@br_abz, %return), ptr blockaddress(@br_abz, %l2)], align 8

  define dso_local i32 @br_aa(i32 %a, i32 %b, i32 %i) {
  entry:
    br label %l2
  l2:
    br label %return
  return:
    ret i32 undef
  }
  define dso_local i32 @br_aaz(i32 %a, i32 %b, i32 %i) {
  entry:
    br label %l2
  l2:
    br label %return
  return:
    ret i32 undef
  }
  define dso_local i32 @br_ab(i32 %a, i32 %b, i32 %i) {
  entry:
    br label %l2
  l2:
    br label %return
  return:
    ret i32 undef
  }
  define dso_local i32 @br_abz(i32 %a, i32 %b, i32 %i) {
  entry:
    br label %l2
  l2:
    br label %return
  return:
    ret i32 undef
  }
...
---
name:            br_aa
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: br_aa:
  bb.0.entry:
    successors: %bb.2, %bb.1
    liveins: $w2
    $x8 = ADRP target-flags(aarch64-page) @ptr_aa
    renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_aa, 0
    renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
    BRAA killed renamable $x8, $sp
  ; CHECK:       braa x8, sp
  ; ISBDSB-NEXT: dsb sy
  ; ISBDSB-NEXT: isb
  ; SB-NEXT:     {{ sb$}}

  bb.1.l2 (ir-block-address-taken %ir-block.l2):
    renamable $w0 = MOVZWi 1, 0
    RET undef $lr, implicit $w0

  bb.2.return (ir-block-address-taken %ir-block.return):
    $w0 = ORRWrs $wzr, $wzr, 0
    RET undef $lr, implicit $w0
...
---
name:            br_aaz
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: br_aaz:
  bb.0.entry:
    successors: %bb.2, %bb.1
    liveins: $w2
    $x8 = ADRP target-flags(aarch64-page) @ptr_aaz
    renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_aaz, 0
    renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
    BRAAZ killed renamable $x8
  ; CHECK:       braaz x8
  ; ISBDSB-NEXT: dsb sy
  ; ISBDSB-NEXT: isb
  ; SB-NEXT:     {{ sb$}}

  bb.1.l2 (ir-block-address-taken %ir-block.l2):
    renamable $w0 = MOVZWi 1, 0
    RET undef $lr, implicit $w0

  bb.2.return (ir-block-address-taken %ir-block.return):
    $w0 = ORRWrs $wzr, $wzr, 0
    RET undef $lr, implicit $w0
...
---
name:            br_ab
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: br_ab:
  bb.0.entry:
    successors: %bb.2, %bb.1
    liveins: $w2
    $x8 = ADRP target-flags(aarch64-page) @ptr_ab
    renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_ab, 0
    renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
    BRAA killed renamable $x8, $sp
  ; CHECK:       braa x8, sp
  ; ISBDSB-NEXT: dsb sy
  ; ISBDSB-NEXT: isb
  ; SB-NEXT:     {{ sb$}}

  bb.1.l2 (ir-block-address-taken %ir-block.l2):
    renamable $w0 = MOVZWi 1, 0
    RET undef $lr, implicit $w0

  bb.2.return (ir-block-address-taken %ir-block.return):
    $w0 = ORRWrs $wzr, $wzr, 0
    RET undef $lr, implicit $w0
...
---
name:            br_abz
tracksRegLiveness: true
body:             |
  ; CHECK-LABEL: br_abz:
  bb.0.entry:
    successors: %bb.2, %bb.1
    liveins: $w2
    $x8 = ADRP target-flags(aarch64-page) @ptr_abz
    renamable $x8 = ADDXri $x8, target-flags(aarch64-pageoff, aarch64-nc) @ptr_abz, 0
    renamable $x8 = LDRXroW killed renamable $x8, killed renamable $w2, 1, 1
    BRAAZ killed renamable $x8
  ; CHECK:       braaz x8
  ; ISBDSB-NEXT: dsb sy
  ; ISBDSB-NEXT: isb
  ; SB-NEXT:     {{ sb$}}

  bb.1.l2 (ir-block-address-taken %ir-block.l2):
    renamable $w0 = MOVZWi 1, 0
    RET undef $lr, implicit $w0

  bb.2.return (ir-block-address-taken %ir-block.return):
    $w0 = ORRWrs $wzr, $wzr, 0
    RET undef $lr, implicit $w0
...