# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=aarch64-- -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s
---
name: condbr_of_not
legalized: true
regBankSelected: true
liveins:
- { reg: '$x0' }
body: |
; CHECK-LABEL: name: condbr_of_not
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64sp = COPY $x0
; CHECK-NEXT: [[LDRBBui:%[0-9]+]]:gpr32 = LDRBBui [[COPY]], 0 :: (load (s8))
; CHECK-NEXT: TBZW [[LDRBBui]], 0, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $x0
%0:gpr(p0) = COPY $x0
%8:gpr(s8) = G_LOAD %0(p0) :: (load (s8))
%4:gpr(s32) = G_ANYEXT %8(s8)
%5:gpr(s32) = G_CONSTANT i32 1
%6:gpr(s32) = G_XOR %4, %5
G_BRCOND %6, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: condbr_of_not_64
legalized: true
regBankSelected: true
liveins:
- { reg: '$x0' }
body: |
; CHECK-LABEL: name: condbr_of_not_64
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:gpr64sp = COPY $x0
; CHECK-NEXT: [[LDRBBui:%[0-9]+]]:gpr32 = LDRBBui [[COPY]], 0 :: (load (s8))
; CHECK-NEXT: TBZW [[LDRBBui]], 0, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
; TB(N)ZX has no encoding if the bit being tested is < 32, so we should get
; TBZW here.
;
bb.1:
successors: %bb.2, %bb.3
liveins: $x0
%0:gpr(p0) = COPY $x0
%8:gpr(s8) = G_LOAD %0(p0) :: (load (s8))
%4:gpr(s64) = G_ANYEXT %8(s8)
%5:gpr(s64) = G_CONSTANT i64 1
%6:gpr(s64) = G_XOR %4, %5
%3:gpr(s32) = G_TRUNC %6(s64)
G_BRCOND %3(s32), %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: condbr_of_and
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: condbr_of_and
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %lhs:gpr32 = COPY $w0
; CHECK-NEXT: TBNZW %lhs, 0, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $w0
%lhs:gpr(s32) = COPY $w0
%rhs:gpr(s32) = G_CONSTANT i32 1
%op:gpr(s32) = G_AND %lhs, %rhs
G_BRCOND %op, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: condbr_of_and_no_cst
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: condbr_of_and_no_cst
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $w0, $w1
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %lhs:gpr32 = COPY $w0
; CHECK-NEXT: %rhs:gpr32 = COPY $w1
; CHECK-NEXT: %op:gpr32 = ANDWrr %lhs, %rhs
; CHECK-NEXT: TBNZW %op, 0, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $w0, $w1
%lhs:gpr(s32) = COPY $w0
%rhs:gpr(s32) = COPY $w1
%op:gpr(s32) = G_AND %lhs, %rhs
G_BRCOND %op, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: condbr_of_shl
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: condbr_of_shl
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %lhs:gpr32 = COPY $w0
; CHECK-NEXT: %op:gpr32 = UBFMWri %lhs, 31, 30
; CHECK-NEXT: TBNZW %op, 0, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
; We won't ever fold this, because
; bit = 0
; bit - constant < 0, which isn't valid for tbz/tbnz.
;
bb.1:
successors: %bb.2, %bb.3
liveins: $w0
%lhs:gpr(s32) = COPY $w0
%rhs:gpr(s32) = G_CONSTANT i32 1
%op:gpr(s32) = G_SHL %lhs, %rhs
G_BRCOND %op, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: condbr_of_ashr
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: condbr_of_ashr
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %lhs:gpr32 = COPY $w0
; CHECK-NEXT: TBNZW %lhs, 1, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
; We can fold ashr, because we can have
;
; (tbz (ashr x, c), 0) where 0 + c > # bits in x.
;
bb.1:
successors: %bb.2, %bb.3
liveins: $w0
%lhs:gpr(s32) = COPY $w0
%rhs:gpr(s32) = G_CONSTANT i32 1
%op:gpr(s32) = G_ASHR %lhs, %rhs
G_BRCOND %op, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
---
name: tbnzx
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: tbnzx
; CHECK: bb.0:
; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %lhs:gpr64 = COPY $x0
; CHECK-NEXT: TBNZX %lhs, 63, %bb.2
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1:
; CHECK-NEXT: RET_ReallyLR
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2:
; CHECK-NEXT: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $x0
%lhs:gpr(s64) = COPY $x0
%rhs:gpr(s64) = G_CONSTANT i64 8589934592
%op:gpr(s64) = G_ASHR %lhs, %rhs
%trunc:gpr(s32) = G_TRUNC %op(s64)
G_BRCOND %trunc, %bb.3
bb.2:
RET_ReallyLR
bb.3:
RET_ReallyLR
...
Codebase Browser
llvm