/
stp-opt-with-renaming.mir
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stp-opt-with-renaming.mir
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# RUN: llc -run-pass=aarch64-ldst-opt -mtriple=arm64-apple-iphoneos -verify-machineinstrs -aarch64-load-store-renaming=true -o - %s | FileCheck %s
# RUN: llc -run-pass=aarch64-ldst-opt -mtriple=arm64-apple-iphoneos -verify-machineinstrs -aarch64-load-store-renaming=false -o - %s | FileCheck --check-prefix=NO-RENAME %s
# NO-RENAME-NOT: STP
# NO-RENAME: test12
# NO-RENAME: STP
# NO-RENAME-NOT: STP
#
---
# CHECK-LABEL: name: test1
# CHECK: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
# CHECK: $x10, renamable $x8 = LDPXi renamable $x0, 0 :: (load 8)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
# CHECK-NEXT: STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
# CHECK-NEXT: renamable $x8 = ADDXrr $x8, $x8
# CHECK-NEXT: STPXi renamable $x8, killed $x10, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
name: test1
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
renamable $x9, renamable $x8 = LDPXi renamable $x0, 0 :: (load 8)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
renamable $x8 = ADDXrr $x8, $x8
STRXui renamable $x8, renamable $x0, 10 :: (store 8, align 4)
RET undef $lr
...
---
# CHECK-LABEL: name: test2
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0, $x9, $x1
# CHECK: $x10, renamable $x8 = LDPXi renamable $x9, 0 :: (load 8)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
# CHECK-NEXT: STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
# CHECK-NEXT: renamable $x8 = ADDXrr $x8, $x8
# CHECK-NEXT: STPXi renamable $x8, killed $x10, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
name: test2
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x9' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x9, $x1
renamable $x9, renamable $x8 = LDPXi renamable $x9, 0 :: (load 8)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
renamable $x8 = ADDXrr $x8, $x8
STRXui renamable $x8, renamable $x0, 10 :: (store 8, align 4)
RET undef $lr
...
---
# MOVK has a tied operand and we currently do not rename across tied defs.
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0
#
# CHECK: renamable $x8 = MRS 58880
# CHECK-NEXT: renamable $x8 = MOVZXi 15309, 0
# CHECK-NEXT: renamable $x8 = MOVKXi renamable $x8, 26239, 16
# CHECK-NEXT: STRXui renamable $x8, renamable $x0, 0, implicit killed $x8 :: (store 8)
# CHECK-NEXT: renamable $x8 = MRS 55840
# CHECK-NEXT: STRXui killed renamable $x8, killed renamable $x0, 1, implicit killed $x8 :: (store 8)
# CHECK-NEXT: RET undef $lr
#
name: test3
alignment: 2
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
frameInfo:
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0
renamable $x8 = MRS 58880, implicit-def $nzcv
renamable $x8 = MOVZXi 15309, 0
renamable $x8 = MOVKXi renamable $x8, 26239, 16
STRXui renamable $x8, renamable $x0, 0, implicit killed $x8 :: (store 8)
renamable $x8 = MRS 55840, implicit-def $nzcv
STRXui killed renamable $x8, renamable killed $x0, 1, implicit killed $x8 :: (store 8)
RET undef $lr
...
---
# CHECK-LABEL: name: test4
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
# CHECK: $x9 = MRS 58880
# CHECK-NEXT: renamable $x8 = MRS 55840
# CHECK-NEXT: STPXi $x9, killed renamable $x8, killed renamable $x0, 0 :: (store 4)
# CHECK-NEXT: RET undef $lr
name: test4
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
renamable $x8 = MRS 58880, implicit-def $nzcv
STRXui renamable $x8, renamable $x0, 0, implicit killed $x8 :: (store 4)
renamable $x8 = MRS 55840, implicit-def $nzcv
STRXui killed renamable $x8, renamable killed $x0, 1, implicit killed $x8 :: (store 4)
RET undef $lr
...
---
# CHECK-LABEL: name: test5
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
# CHECK: $x9 = MRS 58880
# CHECK-NEXT: renamable $x8 = MRS 55840
# CHECK-NEXT: STPWi $w9, killed renamable $w8, killed renamable $x0, 0 :: (store 4)
# CHECK-NEXT: RET undef $lr
name: test5
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
renamable $x8 = MRS 58880, implicit-def $nzcv
STRWui renamable $w8, renamable $x0, 0, implicit killed $x8 :: (store 4)
renamable $x8 = MRS 55840, implicit-def $nzcv
STRWui killed renamable $w8, renamable killed $x0, 1, implicit killed $x8 :: (store 4)
RET undef $lr
...
---
# CHECK-LABEL: name: test6
# CHECK-LABEL: bb.0:
# CHECK: liveins: $x0, $x1, $q3
# CHECK: renamable $q9 = LDRQui $x0, 0 :: (load 16)
# CHECK-NEXT: renamable $q9 = XTNv8i16 renamable $q9, killed renamable $q3
# CHECK-NEXT: STRQui renamable $q9, renamable $x0, 11 :: (store 16, align 4)
# CHECK-NEXT: renamable $q9 = FADDv2f64 renamable $q9, renamable $q9
# CHECK-NEXT: STRQui renamable $q9, renamable $x0, 10 :: (store 16, align 4)
# CHECK-NEXT: RET undef $lr
# XTN has a tied use-def.
name: test6
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
- { reg: '$q3' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $q3
renamable $q9 = LDRQui $x0, 0 :: (load 16)
renamable $q9 = XTNv8i16 renamable $q9, killed renamable $q3
STRQui renamable $q9, renamable $x0, 11 :: (store 16, align 4)
renamable $q9 = FADDv2f64 renamable $q9, renamable $q9
STRQui renamable $q9, renamable $x0, 10 :: (store 16, align 4)
RET undef $lr
...
---
# Currently we do not rename across frame-setup instructions.
# CHECK-LABEL: name: test7
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
# CHECK: $sp = frame-setup SUBXri $sp, 64, 0
# CHECK-NEXT: renamable $x9 = frame-setup LDRXui renamable $x0, 0 :: (load 8)
# CHECK-NEXT: STRXui renamable $x9, $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
# CHECK-NEXT: STRXui renamable $x9, $x0, 11 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
#
name: test7
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
stackSize: 64
maxAlignment: 16
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
stack:
- { id: 0, type: spill-slot, offset: -48, size: 16, alignment: 16 }
- { id: 1, type: spill-slot, offset: -64, size: 16, alignment: 16 }
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
$sp = frame-setup SUBXri $sp, 64, 0
renamable $x9 = frame-setup LDRXui renamable $x0, 0 :: (load 8)
STRXui renamable $x9, $x0, 10 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
STRXui renamable $x9, $x0, 11 :: (store 8, align 4)
RET undef $lr
...
---
# CHECK-LABEL: name: test8
# CHECK-LABEL: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
# CHECK: renamable $x8 = MRS 58880
# CHECK-NEXT: $w9 = ORRWrs $wzr, killed renamable $w8, 0, implicit-def $x9
# CHECK-NEXT: renamable $x8 = MRS 55840
# CHECK-NEXT: STPWi $w9, killed renamable $w8, killed renamable $x0, 0 :: (store 4)
# CHECK-NEXT: RET undef $lr
name: test8
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
renamable $x8 = MRS 58880, implicit-def $nzcv
renamable $w8 = ORRWrs $wzr, killed renamable $w8, 0, implicit-def $x8
STRWui renamable $w8, renamable $x0, 0, implicit killed $x8 :: (store 4)
renamable $x8 = MRS 55840, implicit-def $nzcv
STRWui killed renamable $w8, renamable killed $x0, 1, implicit killed $x8 :: (store 4)
RET undef $lr
...
---
# The reg class returned for $q9 contains only the first 16 Q registers.
# TODO: Can we check that all instructions that require renaming also support
# the second 16 Q registers?
# CHECK-LABEL: name: test9
# CHECK-LABEL: bb.0:
# CHECK: liveins: $x0, $x1, $q0, $q1, $q2, $q3, $q4, $q5, $q6, $q7
# CHECK: renamable $q9 = LDRQui $x0, 0 :: (load 16)
# CHECK-NEXT: STRQui killed renamable $q9, renamable $x0, 10 :: (store 16, align 4)
# CHECK: renamable $q9 = LDRQui $x0, 1 :: (load 16)
# CHECK-NEXT: STRQui renamable $q9, renamable $x0, 11 :: (store 16, align 4)
# CHECK-NEXT: RET undef $lr
name: test9
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
- { reg: '$q3' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $q0, $q1, $q2, $q3, $q4, $q5, $q6, $q7
renamable $q9 = LDRQui $x0, 0 :: (load 16)
STRQui renamable killed $q9, renamable $x0, 10 :: (store 16, align 4)
renamable $q9 = LDRQui $x0, 1 :: (load 16)
STRQui renamable $q9, renamable $x0, 11 :: (store 16, align 4)
RET undef $lr
...
---
# The livein $q7 is killed early, so we can re-use it for renaming.
# CHECK-LABEL: name: test10
# CHECK-LABEL: bb.0:
# CHECK: liveins: $x0, $x1, $q0, $q1, $q2, $q3, $q4, $q5, $q6, $q7
# CHECK: renamable $q7 = FADDv2f64 renamable $q7, renamable $q7
# CHECK-NEXT: STRQui killed renamable $q7, renamable $x0, 100 :: (store 16, align 4)
# CHECK-NEXT: $q7 = LDRQui $x0, 0 :: (load 16)
# CHECK-NEXT: renamable $q9 = LDRQui $x0, 1 :: (load 16)
# CHECK-NEXT: STPQi killed renamable $q9, killed $q7, renamable $x0, 10 :: (store 16, align 4)
# CHECK-NEXT: RET undef $lr
name: test10
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
- { reg: '$q3' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $q0, $q1, $q2, $q3, $q4, $q5, $q6, $q7
renamable $q7 = FADDv2f64 renamable $q7, renamable $q7
STRQui renamable killed $q7, renamable $x0, 100 :: (store 16, align 4)
renamable $q9 = LDRQui $x0, 0 :: (load 16)
STRQui renamable killed $q9, renamable $x0, 11 :: (store 16, align 4)
renamable $q9 = LDRQui $x0, 1 :: (load 16)
STRQui renamable killed $q9, renamable $x0, 10 :: (store 16, align 4)
RET undef $lr
...
---
# Make sure we do not use any registers that are defined between paired candidates
# ($x14 in this example)
# CHECK-LABEL: name: test11
# CHECK: bb.0:
# CHECK-NEXT: liveins: $x0, $x1, $x11, $x12, $x13
# CHECK: renamable $w10 = LDRWui renamable $x0, 0 :: (load 8)
# CHECK-NEXT: $x15, renamable $x8 = LDPXi renamable $x0, 1 :: (load 8)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 3 :: (load 8)
# CHECK-NEXT: renamable $x14 = LDRXui renamable $x0, 5 :: (load 8)
# CHECK-NEXT: STPXi renamable $x9, killed $x15, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: STRXui killed renamable $x14, renamable $x0, 200 :: (store 8, align 4)
# CHECK-NEXT: renamable $w8 = ADDWrr $w10, $w10
# CHECK-NEXT: STRWui renamable $w8, renamable $x0, 100 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
#
name: test11
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $x11, $x12, $x13
renamable $w10 = LDRWui renamable $x0, 0 :: (load 8)
renamable $x9, renamable $x8 = LDPXi renamable $x0, 1 :: (load 8)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 3 :: (load 8)
renamable $x14 = LDRXui renamable $x0, 5 :: (load 8)
STRXui renamable $x9, renamable $x0, 10 :: (store 8, align 4)
STRXui renamable killed $x14, renamable $x0, 200 :: (store 8, align 4)
renamable $w8 = ADDWrr $w10, $w10
STRWui renamable $w8, renamable $x0, 100 :: (store 8, align 4)
RET undef $lr
...
---
# Check that we correctly deal with killed registers in stores that get merged forward,
# which extends the live range of the first store operand.
# CHECK-LABEL: name: test12
# CHECK: bb.0:
# CHECK-NEXT: liveins: $x0, $x1
#
# CHECK: renamable $x10 = LDRXui renamable $x0, 0 :: (load 8)
# CHECK-NEXT: $x11, renamable $x8 = LDPXi renamable $x0, 3 :: (load 8)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
# CHECK-NEXT: renamable $x8 = ADDXrr $x8, $x8
# CHECK-NEXT: STPXi renamable $x8, killed $x11, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: STPXi killed renamable $x10, renamable $x9, renamable $x0, 20 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
name: test12
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1
renamable $x10 = LDRXui renamable $x0, 0 :: (load 8)
STRXui renamable killed $x10, renamable $x0, 20 :: (store 8, align 4)
renamable $x9, renamable $x8 = LDPXi renamable $x0, 3 :: (load 8)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
renamable $x8 = ADDXrr $x8, $x8
STRXui renamable $x8, renamable $x0, 10 :: (store 8, align 4)
STRXui renamable $x9, renamable $x0, 21 :: (store 8, align 4)
RET undef $lr
...
---
# Make sure we do not use any registers that are defined between def to rename and the first
# paired store. ($x14 in this example)
# CHECK-LABEL: name: test13
# CHECK: bb.0:
# CHECK-NEXT: liveins: $x0, $x1, $x10, $x11, $x12, $x13
# CHECK: $x15, renamable $x8 = LDPXi renamable $x0, 0 :: (load 8)
# CHECK-NEXT: renamable $x14 = LDRXui renamable $x0, 4 :: (load 8)
# CHECK-NEXT: STRXui killed renamable $x14, renamable $x0, 100 :: (store 8, align 4)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
# CHECK-NEXT: STPXi renamable $x9, killed $x15, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
#
name: test13
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $x10, $x11, $x12, $x13
renamable $x9, renamable $x8 = LDPXi renamable $x0, 0 :: (load 8)
renamable $x14 = LDRXui renamable $x0, 4 :: (load 8)
STRXui renamable killed $x14, renamable $x0, 100 :: (store 8, align 4)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 2 :: (load 8)
STRXui renamable $x9, renamable $x0, 10 :: (store 8)
RET undef $lr
...
# Make sure we do not rename if pseudo-defs. Noop pseudo instructions like KILL
# may lead to a missing definition of the rename register.
#
# CHECK-LABEL: name: test14_pseudo
# CHECK: bb.0:
# CHECK-NEXT: liveins: $w8, $fp, $w25
# CHECK: renamable $w8 = KILL killed renamable $w8, implicit-def $x8
# CHECK-NEXT: STURXi killed renamable $x8, $fp, -40 :: (store 8)
# CHECK-NEXT: $w8 = ORRWrs $wzr, killed $w25, 0, implicit-def $x8
# CHECK-NEXT: STURXi killed renamable $x8, $fp, -32 :: (store 8)
# CHECK-NEXT: RET undef $lr
#
name: test14_pseudo
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $w8, $fp, $w25
renamable $w8 = KILL killed renamable $w8, implicit-def $x8
STURXi killed renamable $x8, $fp, -40 :: (store 8)
$w8 = ORRWrs $wzr, killed $w25, 0, implicit-def $x8
STURXi killed renamable $x8, $fp, -32 :: (store 8)
RET undef $lr
...
---
# Make sure we do not pick a register marked as undef for renaming.
#
# CHECK-LABEL: name: test15_undef_op
# CHECK: bb.0:
# CHECK-NEXT: liveins: $x0, $x1, $x8
# CHECK: undef renamable $x10, $x11 = LDPXi renamable $x0, 0 :: (load 8)
# CHECK-NEXT: renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
# CHECK-NEXT: STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
# CHECK-NEXT: renamable $x10 = ADDXrr $x10, $x10
# CHECK-NEXT: STPXi renamable $x10, killed $x11, renamable $x0, 10 :: (store 8, align 4)
# CHECK-NEXT: RET undef $lr
#
name: test15_undef_op
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '$x0' }
- { reg: '$x1' }
- { reg: '$x8' }
frameInfo:
maxAlignment: 1
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0:
liveins: $x0, $x1, $x8
renamable undef $x10, renamable $x9 = LDPXi renamable $x0, 0 :: (load 8)
STRXui renamable killed $x9, renamable $x0, 11 :: (store 8, align 4)
renamable $x9 = LDRXui renamable $x0, 1 :: (load 8)
STRXui renamable $x9, renamable $x0, 100 :: (store 8, align 4)
renamable $x10 = ADDXrr $x10, $x10
STRXui renamable $x10, renamable $x0, 10 :: (store 8, align 4)
RET undef $lr
...