/
opt-fold-compare.mir
579 lines (549 loc) · 18.5 KB
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opt-fold-compare.mir
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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
#
# Verify folding operations into G_ICMP.
#
# E.g cmn/adds folding:
#
# x = G_SUB 0, y
# G_ICMP intpred(something_safe) z, x
#
# Folds to:
# adds z, y
#
# Where "something_safe" is ne or eq.
#
# ands/tst folding:
#
# z = G_AND x, y
# G_ICMP z, 0
#
# Folds to:
#
# tst x, y
#
# When we have signed comparisons.
#
# Tests whose names start with cmn_ should use ADDS for the G_ICMP. Tests whose
# names start with no_cmn should use SUBS. Similarly, tests whose names start
# with TST should use ANDS for the G_ICMP.
#
...
---
name: cmn_s32_rhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: cmn_s32_rhs
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: $wzr = ADDSWrr [[COPY]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY2]], 1, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_SUB %2, %1
%7:gpr(s32) = G_ICMP intpred(ne), %0(s32), %3
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: cmn_s32_lhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: cmn_s32_lhs
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: $wzr = ADDSWrr [[COPY]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY2]], 1, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_SUB %2, %0
%7:gpr(s32) = G_ICMP intpred(ne), %3(s32), %1
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: no_cmn_s32_rhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: no_cmn_s32_rhs
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBSWrr:%[0-9]+]]:gpr32 = SUBSWrr [[COPY2]], [[COPY1]], implicit-def $nzcv
; CHECK: [[SUBSWrr1:%[0-9]+]]:gpr32 = SUBSWrr [[COPY]], [[SUBSWrr]], implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY2]], 11, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_SUB %2, %1
%7:gpr(s32) = G_ICMP intpred(slt), %0(s32), %3
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: no_cmn_s32_lhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: no_cmn_s32_lhs
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w0
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY2:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBSWrr:%[0-9]+]]:gpr32 = SUBSWrr [[COPY2]], [[COPY]], implicit-def $nzcv
; CHECK: [[SUBSWrr1:%[0-9]+]]:gpr32 = SUBSWrr [[SUBSWrr]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY2]], 11, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_SUB %2, %0
%7:gpr(s32) = G_ICMP intpred(slt), %3(s32), %1
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: cmn_s64_rhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: cmn_s64_rhs
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[COPY2:%[0-9]+]]:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: $xzr = ADDSXrr [[COPY]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELXr:%[0-9]+]]:gpr64 = CSELXr [[SUBREG_TO_REG]], [[COPY2]], 1, implicit $nzcv
; CHECK: $x0 = COPY [[CSELXr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
%2:gpr(s64) = G_CONSTANT i64 0
%6:gpr(s64) = G_CONSTANT i64 1
%3:gpr(s64) = G_SUB %2, %1
%7:gpr(s32) = G_ICMP intpred(ne), %0(s64), %3
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s64) = G_SELECT %4(s1), %6, %2
$x0 = COPY %5(s64)
RET_ReallyLR implicit $x0
...
---
name: cmn_s64_lhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: cmn_s64_lhs
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[COPY2:%[0-9]+]]:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: $xzr = ADDSXrr [[COPY]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELXr:%[0-9]+]]:gpr64 = CSELXr [[SUBREG_TO_REG]], [[COPY2]], 1, implicit $nzcv
; CHECK: $x0 = COPY [[CSELXr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
%2:gpr(s64) = G_CONSTANT i64 0
%6:gpr(s64) = G_CONSTANT i64 1
%3:gpr(s64) = G_SUB %2, %0
%7:gpr(s32) = G_ICMP intpred(ne), %3(s64), %1
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s64) = G_SELECT %4(s1), %6, %2
$x0 = COPY %5(s64)
RET_ReallyLR implicit $x0
...
---
name: no_cmn_s64_rhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: no_cmn_s64_rhs
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[COPY2:%[0-9]+]]:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr [[COPY2]], [[COPY1]], implicit-def $nzcv
; CHECK: [[SUBSXrr1:%[0-9]+]]:gpr64 = SUBSXrr [[COPY]], [[SUBSXrr]], implicit-def $nzcv
; CHECK: [[CSELXr:%[0-9]+]]:gpr64 = CSELXr [[SUBREG_TO_REG]], [[COPY2]], 11, implicit $nzcv
; CHECK: $x0 = COPY [[CSELXr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
%2:gpr(s64) = G_CONSTANT i64 0
%6:gpr(s64) = G_CONSTANT i64 1
%3:gpr(s64) = G_SUB %2, %1
%7:gpr(s32) = G_ICMP intpred(slt), %0(s64), %3
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s64) = G_SELECT %4(s1), %6, %2
$x0 = COPY %5(s64)
RET_ReallyLR implicit $x0
...
---
name: no_cmn_s64_lhs
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: no_cmn_s64_lhs
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[COPY2:%[0-9]+]]:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr [[COPY2]], [[COPY]], implicit-def $nzcv
; CHECK: [[SUBSXrr1:%[0-9]+]]:gpr64 = SUBSXrr [[SUBSXrr]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSELXr:%[0-9]+]]:gpr64 = CSELXr [[SUBREG_TO_REG]], [[COPY2]], 11, implicit $nzcv
; CHECK: $x0 = COPY [[CSELXr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
%2:gpr(s64) = G_CONSTANT i64 0
%6:gpr(s64) = G_CONSTANT i64 1
%3:gpr(s64) = G_SUB %2, %0
%7:gpr(s32) = G_ICMP intpred(slt), %3(s64), %1
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s64) = G_SELECT %4(s1), %6, %2
$x0 = COPY %5(s64)
RET_ReallyLR implicit $x0
...
---
name: tst_s32
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: tst_s32
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: $wzr = ANDSWrr [[COPY1]], [[COPY]], implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY1]], 0, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_AND %2, %1
%8:gpr(s32) = G_CONSTANT i32 0
%7:gpr(s32) = G_ICMP intpred(eq), %3(s32), %8
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: tst_s64
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: tst_s64
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: $xzr = ANDSXrr [[COPY1]], [[COPY]], implicit-def $nzcv
; CHECK: [[CSELXr:%[0-9]+]]:gpr64 = CSELXr [[SUBREG_TO_REG]], [[COPY1]], 0, implicit $nzcv
; CHECK: $x0 = COPY [[CSELXr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
%2:gpr(s64) = G_CONSTANT i64 0
%6:gpr(s64) = G_CONSTANT i64 1
%3:gpr(s64) = G_AND %2, %1
%8:gpr(s64) = G_CONSTANT i64 0
%7:gpr(s32) = G_ICMP intpred(eq), %3(s64), %8
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s64) = G_SELECT %4(s1), %6, %2
$x0 = COPY %5(s64)
RET_ReallyLR implicit $x0
...
---
name: no_tst_unsigned_compare
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: no_tst_unsigned_compare
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[ANDWrr:%[0-9]+]]:gpr32common = ANDWrr [[COPY1]], [[COPY]]
; CHECK: $wzr = SUBSWri [[ANDWrr]], 0, 0, implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY1]], 8, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_AND %2, %1
%8:gpr(s32) = G_CONSTANT i32 0
%7:gpr(s32) = G_ICMP intpred(ugt), %3(s32), %8
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: no_tst_nonzero
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: no_tst_nonzero
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY $wzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: [[ANDWrr:%[0-9]+]]:gpr32common = ANDWrr [[COPY1]], [[COPY]]
; CHECK: $wzr = SUBSWri [[ANDWrr]], 42, 0, implicit-def $nzcv
; CHECK: [[CSELWr:%[0-9]+]]:gpr32 = CSELWr [[MOVi32imm]], [[COPY1]], 8, implicit $nzcv
; CHECK: $w0 = COPY [[CSELWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%6:gpr(s32) = G_CONSTANT i32 1
%3:gpr(s32) = G_AND %2, %1
%8:gpr(s32) = G_CONSTANT i32 42
%7:gpr(s32) = G_ICMP intpred(ugt), %3(s32), %8
%4:gpr(s1) = G_TRUNC %7(s32)
%5:gpr(s32) = G_SELECT %4(s1), %6, %2
$w0 = COPY %5(s32)
RET_ReallyLR implicit $w0
...
---
name: imm_tst
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: imm_tst
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: $wzr = ANDSWri [[COPY]], 1, implicit-def $nzcv
; CHECK: [[CSINCWr:%[0-9]+]]:gpr32 = CSINCWr $wzr, $wzr, 1, implicit $nzcv
; CHECK: $w0 = COPY [[CSINCWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%3:gpr(s32) = G_CONSTANT i32 1
; This can be represented as a logical immediate, so we can pull it into
; the ANDS. We should get ANDSWri.
%4:gpr(s32) = G_CONSTANT i32 3
%5:gpr(s32) = G_AND %1, %4
%6:gpr(s32) = G_ICMP intpred(eq), %5(s32), %2
$w0 = COPY %6(s32)
RET_ReallyLR implicit $w0
...
---
name: no_imm_tst_not_logical_imm
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; CHECK-LABEL: name: no_imm_tst_not_logical_imm
; CHECK: liveins: $w0, $w1
; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY $w1
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm -1
; CHECK: $wzr = ANDSWrr [[COPY]], [[MOVi32imm]], implicit-def $nzcv
; CHECK: [[CSINCWr:%[0-9]+]]:gpr32 = CSINCWr $wzr, $wzr, 1, implicit $nzcv
; CHECK: $w0 = COPY [[CSINCWr]]
; CHECK: RET_ReallyLR implicit $w0
%0:gpr(s32) = COPY $w0
%1:gpr(s32) = COPY $w1
%2:gpr(s32) = G_CONSTANT i32 0
%3:gpr(s32) = G_CONSTANT i32 1
; This immediate can't be represented as a logical immediate. We shouldn't
; select ANDSWri.
%4:gpr(s32) = G_CONSTANT i32 -1
%5:gpr(s32) = G_AND %1, %4
%6:gpr(s32) = G_ICMP intpred(eq), %5(s32), %2
$w0 = COPY %6(s32)
RET_ReallyLR implicit $w0
...
---
name: test_physreg_copy
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; CHECK-LABEL: name: test_physreg_copy
; CHECK: liveins: $x0, $x1
; CHECK: [[COPY:%[0-9]+]]:gpr64 = COPY $x0
; CHECK: [[COPY1:%[0-9]+]]:gpr64 = COPY $x1
; CHECK: [[SUBSXrr:%[0-9]+]]:gpr64 = SUBSXrr [[COPY]], [[COPY1]], implicit-def $nzcv
; CHECK: [[CSINCWr:%[0-9]+]]:gpr32 = CSINCWr $wzr, $wzr, 1, implicit $nzcv
; CHECK: $w0 = COPY [[CSINCWr]]
; CHECK: RET_ReallyLR implicit $x0
%0:gpr(s64) = COPY $x0
%1:gpr(s64) = COPY $x1
; When we find the defs of the LHS and RHS of the compare, we walk over
; copies. Make sure that we don't crash when we hit a copy from a physical
; register.
%7:gpr(s32) = G_ICMP intpred(eq), %0, %1
$w0 = COPY %7(s32)
RET_ReallyLR implicit $x0
...
---
name: tst_fold_shift_s64
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $x1
; We should fold the G_SHL into the ANDS to get ANDSXrs.
;
; CHECK-LABEL: name: tst_fold_shift_s64
; CHECK: liveins: $x0, $x1
; CHECK: %copy:gpr64 = COPY $x1
; CHECK: %zero:gpr64 = COPY $xzr
; CHECK: [[MOVi32imm:%[0-9]+]]:gpr32 = MOVi32imm 1
; CHECK: %one:gpr64 = SUBREG_TO_REG 0, [[MOVi32imm]], %subreg.sub_32
; CHECK: $xzr = ANDSXrs %zero, %copy, 16, implicit-def $nzcv
; CHECK: %select:gpr64 = CSELXr %one, %zero, 0, implicit $nzcv
; CHECK: $x0 = COPY %select
; CHECK: RET_ReallyLR implicit $x0
%copy:gpr(s64) = COPY $x1
%zero:gpr(s64) = G_CONSTANT i64 0
%one:gpr(s64) = G_CONSTANT i64 1
%cst:gpr(s64) = G_CONSTANT i64 16
%shift:gpr(s64) = G_SHL %copy(s64), %cst(s64)
%and:gpr(s64) = G_AND %zero, %shift
%cmp:gpr(s32) = G_ICMP intpred(eq), %and(s64), %zero
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
%select:gpr(s64) = G_SELECT %cmp_trunc(s1), %one, %zero
$x0 = COPY %select(s64)
RET_ReallyLR implicit $x0
...
---
name: tst_fold_shift_s32
alignment: 4
legalized: true
regBankSelected: true
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
; We should fold the G_SHL into the ANDS to get ANDSWrs.
;
; CHECK-LABEL: name: tst_fold_shift_s32
; CHECK: liveins: $w0, $w1
; CHECK: %copy:gpr32 = COPY $w1
; CHECK: %zero:gpr32 = COPY $wzr
; CHECK: %one:gpr32 = MOVi32imm 1
; CHECK: $wzr = ANDSWrs %zero, %copy, 16, implicit-def $nzcv
; CHECK: %select:gpr32 = CSELWr %one, %zero, 0, implicit $nzcv
; CHECK: $w0 = COPY %select
; CHECK: RET_ReallyLR implicit $w0
%copy:gpr(s32) = COPY $w1
%zero:gpr(s32) = G_CONSTANT i32 0
%one:gpr(s32) = G_CONSTANT i32 1
%cst:gpr(s32) = G_CONSTANT i32 16
%shift:gpr(s32) = G_SHL %copy(s32), %cst(s32)
%and:gpr(s32) = G_AND %zero, %shift
%cmp:gpr(s32) = G_ICMP intpred(eq), %and(s32), %zero
%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
%select:gpr(s32) = G_SELECT %cmp_trunc(s1), %one, %zero
$w0 = COPY %select(s32)
RET_ReallyLR implicit $w0