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|
# 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 TBNZ when we have a slt compare against 0.
#
# The bit tested should be the size of the test register minus 1.
#
...
---
name: tbnzx_slt
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: tbnzx_slt
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr64 = COPY $x0
; CHECK: TBNZX %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
%zero:gpr(s64) = G_CONSTANT i64 0
%cmp:gpr(s32) = G_ICMP intpred(slt), %copy(s64), %zero
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
G_BRCOND %cmp_trunc(s1), %bb.1
G_BR %bb.0
bb.1:
RET_ReallyLR
...
---
name: tbnzw_slt
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: tbnzw_slt
; CHECK: bb.0:
; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
; CHECK: %copy:gpr32 = COPY $w0
; CHECK: TBNZW %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
%zero:gpr(s32) = G_CONSTANT i32 0
%cmp:gpr(s32) = G_ICMP intpred(slt), %copy(s32), %zero
%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_tbnz_not_zero
alignment: 4
legalized: true
regBankSelected: true
body: |
; CHECK-LABEL: name: no_tbnz_not_zero
; 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 11, %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(slt), %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: [[ANDSXri:%[0-9]+]]:gpr64 = ANDSXri %copy, 8000, implicit-def $nzcv
; CHECK: Bcc 11, %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
%zero:gpr(s64) = G_CONSTANT i64 0
%c:gpr(s64) = G_CONSTANT i64 8
%and:gpr(s64) = G_AND %copy, %bit
%cmp:gpr(s32) = G_ICMP intpred(slt), %and(s64), %zero
%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: %zero:gpr64 = COPY $xzr
; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr %zero, %copy, implicit-def $nzcv
; CHECK: Bcc 11, %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
%zero:gpr(s64) = G_CONSTANT i64 0
%cmp:gpr(s32) = G_ICMP intpred(slt), %zero, %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
|
