llvm/test/CodeGen/AArch64/and-sink.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc -mtriple=aarch64-linux-gnu -verify-machineinstrs < %s | FileCheck %s
; RUN: opt -S -passes='require<profile-summary>,function(codegenprepare)' -mtriple=aarch64-linux %s | FileCheck --check-prefix=CHECK-CGP %s
; RUN: opt -S -passes='require<profile-summary>,function(codegenprepare)' -cgpp-huge-func=0 -mtriple=aarch64-linux %s | FileCheck --check-prefix=CHECK-CGP %s

@A = dso_local global i32 zeroinitializer
@B = dso_local global i32 zeroinitializer
@C = dso_local global i32 zeroinitializer

; Test that and is sunk into cmp block to form tbz.
define dso_local i32 @and_sink1(i32 %a, i1 %c) {
; CHECK-LABEL: and_sink1:
; CHECK:       // %bb.0:
; CHECK-NEXT:    tbz w1, #0, .LBB0_3
; CHECK-NEXT:  // %bb.1: // %bb0
; CHECK-NEXT:    adrp x8, A
; CHECK-NEXT:    str wzr, [x8, :lo12:A]
; CHECK-NEXT:    tbnz w0, #2, .LBB0_3
; CHECK-NEXT:  // %bb.2:
; CHECK-NEXT:    mov w0, #1 // =0x1
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB0_3: // %bb2
; CHECK-NEXT:    mov w0, wzr
; CHECK-NEXT:    ret

; CHECK-CGP-LABEL: @and_sink1(
; CHECK-CGP-NOT: and i32
  %and = and i32 %a, 4
  br i1 %c, label %bb0, label %bb2
bb0:
; CHECK-CGP-LABEL: bb0:
; CHECK-CGP: and i32
; CHECK-CGP-NEXT: icmp eq i32
; CHECK-CGP-NEXT: store
; CHECK-CGP-NEXT: br
  %cmp = icmp eq i32 %and, 0
  store i32 0, ptr @A
  br i1 %cmp, label %bb1, label %bb2
bb1:
  ret i32 1
bb2:
  ret i32 0
}

; Test that both 'and' and cmp get sunk to form tbz.
define dso_local i32 @and_sink2(i32 %a, i1 %c, i1 %c2) {
; CHECK-LABEL: and_sink2:
; CHECK:       // %bb.0:
; CHECK-NEXT:    adrp x8, A
; CHECK-NEXT:    str wzr, [x8, :lo12:A]
; CHECK-NEXT:    tbz w1, #0, .LBB1_5
; CHECK-NEXT:  // %bb.1: // %bb0.preheader
; CHECK-NEXT:    adrp x8, B
; CHECK-NEXT:    adrp x9, C
; CHECK-NEXT:  .LBB1_2: // %bb0
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    str wzr, [x8, :lo12:B]
; CHECK-NEXT:    tbz w2, #0, .LBB1_5
; CHECK-NEXT:  // %bb.3: // %bb1
; CHECK-NEXT:    // in Loop: Header=BB1_2 Depth=1
; CHECK-NEXT:    str wzr, [x9, :lo12:C]
; CHECK-NEXT:    tbnz w0, #2, .LBB1_2
; CHECK-NEXT:  // %bb.4:
; CHECK-NEXT:    mov w0, #1 // =0x1
; CHECK-NEXT:    ret
; CHECK-NEXT:  .LBB1_5:
; CHECK-NEXT:    mov w0, wzr
; CHECK-NEXT:    ret

; CHECK-CGP-LABEL: @and_sink2(
; CHECK-CGP-NOT: and i32
  %and = and i32 %a, 4
  store i32 0, ptr @A
  br i1 %c, label %bb0, label %bb3
bb0:
; CHECK-CGP-LABEL: bb0:
; CHECK-CGP-NOT: and i32
; CHECK-CGP-NOT: icmp
  %cmp = icmp eq i32 %and, 0
  store i32 0, ptr @B
  br i1 %c2, label %bb1, label %bb3
bb1:
; CHECK-CGP-LABEL: bb1:
; CHECK-CGP: and i32
; CHECK-CGP-NEXT: icmp eq i32
; CHECK-CGP-NEXT: store
; CHECK-CGP-NEXT: br
  store i32 0, ptr @C
  br i1 %cmp, label %bb2, label %bb0
bb2:
  ret i32 1
bb3:
  ret i32 0
}

; Test that 'and' is not sunk since cbz is a better alternative.
define dso_local i32 @and_sink3(i32 %a) {
; CHECK-LABEL: and_sink3:
; CHECK:       // %bb.0:
; CHECK-NEXT:    adrp x8, A
; CHECK-NEXT:    and w9, w0, #0x3
; CHECK-NEXT:  .LBB2_1: // %bb0
; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    str wzr, [x8, :lo12:A]
; CHECK-NEXT:    cbz w9, .LBB2_1
; CHECK-NEXT:  // %bb.2: // %bb2
; CHECK-NEXT:    mov w0, wzr
; CHECK-NEXT:    ret

; CHECK-CGP-LABEL: @and_sink3(
; CHECK-CGP-NEXT: and i32
  %and = and i32 %a, 3
  br label %bb0
bb0:
; CHECK-CGP-LABEL: bb0:
; CHECK-CGP-NOT: and i32
  %cmp = icmp eq i32 %and, 0
  store i32 0, ptr @A
  br i1 %cmp, label %bb0, label %bb2
bb2:
  ret i32 0
}