select-cbz.mir
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# 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: cbz_s32
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: cbz_s32
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: CBZW [[COPY]], %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
bb.0:
liveins: $w0
successors: %bb.0, %bb.1
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = G_CONSTANT i32 0
%2:gpr(s32) = G_ICMP intpred(eq), %0, %1
%3:gpr(s1) = G_TRUNC %2(s32)
G_BRCOND %3(s1), %bb.1
G_BR %bb.0
bb.1:
...
---
name: cbz_s64
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: cbz_s64
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: CBZX [[COPY]], %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
bb.0:
liveins: $x0
successors: %bb.0, %bb.1
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = G_CONSTANT i64 0
%2:gpr(s32) = G_ICMP intpred(eq), %0, %1
%3:gpr(s1) = G_TRUNC %2(s32)
G_BRCOND %3(s1), %bb.1
G_BR %bb.0
bb.1:
...
---
name: cbnz_s32
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: cbnz_s32
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: CBNZW [[COPY]], %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
bb.0:
liveins: $w0
successors: %bb.0, %bb.1
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = G_CONSTANT i32 0
%2:gpr(s32) = G_ICMP intpred(ne), %0, %1
%3:gpr(s1) = G_TRUNC %2(s32)
G_BRCOND %3(s1), %bb.1
G_BR %bb.0
bb.1:
...
---
name: cbnz_s64
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: cbnz_s64
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: CBNZX [[COPY]], %bb.1
; CHECK: B %bb.0
; CHECK: bb.1:
bb.0:
liveins: $x0
successors: %bb.0, %bb.1
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = G_CONSTANT i64 0
%2:gpr(s32) = G_ICMP intpred(ne), %0, %1
%3:gpr(s1) = G_TRUNC %2(s32)
G_BRCOND %3(s1), %bb.1
G_BR %bb.0
bb.1:
...
---
name: test_rhs_inttoptr
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: test_rhs_inttoptr
; CHECK: bb.0:
; CHECK: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK: liveins: $x0
; CHECK: [[COPY:%[0-9]+]]:gpr64common = COPY $x0
; CHECK: CBZX [[COPY]], %bb.2
; CHECK: bb.1:
; CHECK: successors: %bb.2(0x80000000)
; CHECK: STRXui $xzr, [[COPY]], 0 :: (store 8)
; CHECK: bb.2:
; CHECK: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $x0
%0:gpr(p0) = COPY $x0
%2:gpr(s64) = G_CONSTANT i64 0
%1:gpr(p0) = G_INTTOPTR %2(s64)
%4:gpr(s32) = G_ICMP intpred(eq), %0(p0), %1
%3:gpr(s1) = G_TRUNC %4(s32)
G_BRCOND %3(s1), %bb.3
bb.2:
%5:gpr(s64) = G_CONSTANT i64 0
G_STORE %5(s64), %0(p0) :: (store 8)
bb.3:
RET_ReallyLR
...
---
name: test_rhs_unknown
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: test_rhs_unknown
; CHECK: bb.0:
; CHECK: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; CHECK: liveins: $x0
; CHECK: [[COPY:%[0-9]+]]:gpr64sp = COPY $x0
; CHECK: [[LDRXui:%[0-9]+]]:gpr64common = LDRXui [[COPY]], 0 :: (load 8)
; CHECK: $xzr = SUBSXri [[LDRXui]], 42, 0, implicit-def $nzcv
; CHECK: Bcc 0, %bb.2, implicit $nzcv
; CHECK: bb.1:
; CHECK: successors: %bb.2(0x80000000)
; CHECK: STRXui $xzr, [[COPY]], 0 :: (store 8)
; CHECK: bb.2:
; CHECK: RET_ReallyLR
bb.1:
successors: %bb.2, %bb.3
liveins: $x0
%0:gpr(p0) = COPY $x0
%2:gpr(s64) = G_CONSTANT i64 42
%4:gpr(s64) = G_CONSTANT i64 0
%1:gpr(s64) = G_LOAD %0(p0) :: (load 8)
%5:gpr(s32) = G_ICMP intpred(eq), %1(s64), %2
%3:gpr(s1) = G_TRUNC %5(s32)
G_BRCOND %3(s1), %bb.3
bb.2:
%6:gpr(s64) = G_CONSTANT i64 0
G_STORE %6(s64), %0(p0) :: (store 8)
bb.3:
RET_ReallyLR
...
---
name: update_pred_minus_one
legalized: true
regBankSelected: true
body: |
; The G_ICMP here will be optimized into a slt against 0.
; The branch should inherit this change, so we should have Bcc 11 rather than
; Bcc 13.
; CHECK-LABEL: name: update_pred_minus_one
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: [[COPY:%[0-9]+]]:gpr32sp = COPY $w0
; CHECK: $wzr = SUBSWri [[COPY]], 0, 0, implicit-def $nzcv
; CHECK: Bcc 11, %bb.1, implicit $nzcv
; CHECK: B %bb.0
; CHECK: bb.1:
bb.0:
liveins: $w0
successors: %bb.0, %bb.1
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = G_CONSTANT i32 -1
%2:gpr(s32) = G_ICMP intpred(sle), %0, %1
%3:gpr(s1) = G_TRUNC %2(s32)
G_BRCOND %3(s1), %bb.1
G_BR %bb.0
bb.1:
...