test/CodeGen/AArch64/GlobalISel/tbz-sgt.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64-unknown-unknown -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s
#
# Test that we can produce a tbz when we have a sgt compare against -1.
#
# The bit tested should be the size of the test register minus 1.
#

...
---
name:            tbzx_sgt
alignment:       4
legalized:       true
regBankSelected: true
body:             |
  ; CHECK-LABEL: name: tbzx_sgt
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   %copy:gpr64 = COPY $x0
  ; CHECK:   TBZX %copy, 63, %bb.1
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s64) = COPY $x0
    %negative_one:gpr(s64) = G_CONSTANT i64 -1
    %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s64), %negative_one
    %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
    G_BRCOND %cmp_trunc(s1), %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR

...
---
name:            tbzw_sgt
alignment:       4
legalized:       true
regBankSelected: true
body:             |
  ; CHECK-LABEL: name: tbzw_sgt
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   %copy:gpr32 = COPY $w0
  ; CHECK:   TBZW %copy, 31, %bb.1
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s32) = COPY $w0
    %negative_one:gpr(s32) = G_CONSTANT i32 -1
    %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %negative_one
    %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
    G_BRCOND %cmp_trunc(s1), %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR

...
---
name:            no_tbz_not_negative_one
alignment:       4
legalized:       true
regBankSelected: true
body:             |
  ; CHECK-LABEL: name: no_tbz_not_negative_one
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   %copy:gpr32sp = COPY $w0
  ; CHECK:   [[SUBSWri:%[0-9]+]]:gpr32 = SUBSWri %copy, 1, 0, implicit-def $nzcv
  ; CHECK:   Bcc 12, %bb.1, implicit $nzcv
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s32) = COPY $w0
    %one:gpr(s32) = G_CONSTANT i32 1
    %cmp:gpr(s32) = G_ICMP intpred(sgt), %copy(s32), %one
    %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
    G_BRCOND %cmp_trunc(s1), %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR

...
---
name:            dont_fold_and
alignment:       4
legalized:       true
regBankSelected: true
body:             |
  ; CHECK-LABEL: name: dont_fold_and
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   %copy:gpr64 = COPY $x0
  ; CHECK:   %and:gpr64sp = ANDXri %copy, 8000
  ; CHECK:   [[ADDSXri:%[0-9]+]]:gpr64 = ADDSXri %and, 1, 0, implicit-def $nzcv
  ; CHECK:   Bcc 12, %bb.1, implicit $nzcv
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s64) = COPY $x0
    %bit:gpr(s64) = G_CONSTANT i64 8
    %negative_one:gpr(s64) = G_CONSTANT i64 -1
    %c:gpr(s64) = G_CONSTANT i64 8
    %and:gpr(s64) = G_AND %copy, %bit
    %cmp:gpr(s32) = G_ICMP intpred(sgt), %and(s64), %negative_one
    %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
    G_BRCOND %cmp_trunc(s1), %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR

...
---
name:            dont_commute
alignment:       4
legalized:       true
regBankSelected: true
body:             |
  ; CHECK-LABEL: name: dont_commute
  ; CHECK: bb.0:
  ; CHECK:   successors: %bb.0(0x40000000), %bb.1(0x40000000)
  ; CHECK:   %copy:gpr64 = COPY $x0
  ; CHECK:   %negative_one:gpr64 = MOVi64imm -1
  ; CHECK:   [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr %negative_one, %copy, implicit-def $nzcv
  ; CHECK:   Bcc 12, %bb.1, implicit $nzcv
  ; CHECK:   B %bb.0
  ; CHECK: bb.1:
  ; CHECK:   RET_ReallyLR
  bb.0:
    successors: %bb.0, %bb.1
    liveins: $x0
    %copy:gpr(s64) = COPY $x0
    %negative_one:gpr(s64) = G_CONSTANT i64 -1
    %cmp:gpr(s32) = G_ICMP intpred(sgt), %negative_one, %copy(s64)
    %cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
    G_BRCOND %cmp_trunc(s1), %bb.1
    G_BR %bb.0
  bb.1:
    RET_ReallyLR