# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck %s
---
# Sink w19 to %bb.1.
# CHECK-LABEL: name: sinkcopy1
# CHECK-LABEL: bb.0:
# CHECK-NOT: $w19 = COPY killed $w0
# CHECK-LABEL: bb.1:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY killed $w0
name: sinkcopy1
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY killed $w0
Bcc 11, %bb.1, implicit $nzcv
B %bb.2
bb.1:
liveins: $w1, $w19
$w0 = ADDWrr $w1, $w19
RET $x0
bb.2:
$w0 = COPY $wzr
RET $x0
...
---
# Sink w19 to %bb.2.
# CHECK-LABEL: name: sinkcopy2
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY killed $w0
# CHECK-LABEL: bb.2:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY killed $w0
name: sinkcopy2
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY killed $w0
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
$w0 = COPY $wzr
RET $x0
bb.2:
liveins: $w1, $w19
$w0 = ADDWrr $w1, $w19
RET $x0
...
---
# Sink w19 and w20 to %bb.1.
# CHECK-LABEL: name: sinkcopy3
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY killed $w0
# CHECK-LABEL: bb.1:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY killed $w0
# CHECK: renamable $w20 = COPY killed $w1
name: sinkcopy3
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY killed $w0
renamable $w20 = COPY killed $w1
bb.1:
liveins: $w19, $w20
$w0 = COPY $w19
$w1 = COPY $w20
RET $x0
...
# Sink w19 to %bb.1 and w20 to %bb.2.
# CHECK-LABEL: name: sinkcopy4
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY $w0
# CHECK-NOT: renamable $w20 = COPY $w1
# CHECK-LABEL: bb.1:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY $w0
# CHECK-LABEL: bb.2:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w20 = COPY $w1
name: sinkcopy4
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
renamable $w20 = COPY $w1
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
liveins: $w1, $w19
$w0 = ADDWrr $w1, $w19
RET $x0
bb.2:
liveins: $w0, $w20
$w0 = ADDWrr $w0, $w20
RET $x0
...
# Sink w19 to %bb.3 through %bb.2.
# CHECK-LABEL: name: sinkcopy5
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY $w0
# CHECK-LABEL: bb.2:
# CHECK: $w1 = ADDWrr $w1, $w0
# CHECK-LABEL: bb.3:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY killed $w0
name: sinkcopy5
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
Bcc 11, %bb.2, implicit $nzcv
bb.1:
liveins: $x0
$w19 = COPY $wzr
RET $x0
bb.2:
liveins: $w0, $w1, $w19
$w1 = ADDWrr $w1, killed $w0
bb.3:
liveins: $w1, $w19
$w0 = ADDWrr $w1, $w19
RET $x0
...
# Sink w19 to %bb.3, but through %bb.2.
# CHECK-LABEL: name: sinkcopy6
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY $w0
# CHECK-NOT: renamable $w20 = COPY $w0
# CHECK-LABEL: bb.2:
# CHECK: liveins: $w0, $w1
# CHECK: renamable $w19 = COPY $w0
# CHECK: renamable $w20 = COPY $w19
name: sinkcopy6
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
renamable $w20 = COPY $w19
Bcc 11, %bb.2, implicit $nzcv
bb.1:
$w0 = COPY $wzr
RET $x0
bb.2:
liveins: $w1, $w20
$w0 = ADDWrr killed $w1, $w20
RET $x0
...
---
# Sink w19 regardless of the def of wzr in bb.0.
# CHECK-LABEL: name: sinkcopy7
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY $w0
# CHECK-LABEL: bb.2:
# CHECK: renamable $w19 = COPY $wzr
name: sinkcopy7
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
renamable $w19 = COPY $wzr
$wzr = SUBSWri $w1, 1, 0, implicit-def $nzcv
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
$x0 = COPY $xzr
RET $x0
bb.2:
liveins: $w0, $w19
$w0 = ADDWrr $w0, $w19
RET $x0
...
---
# Sink w19 to %bb.3 through %bb.2.
# CHECK-LABEL: name: sinkcopy8
# CHECK-LABEL: bb.0:
# CHECK-NOT: renamable $w19 = COPY $w0, implicit-def $x19
# CHECK-LABEL: bb.2:
# CHECK: $w1 = ADDWrr $w1, $w0, implicit $x0
# CHECK-LABEL: bb.3:
# CHECK: liveins: $w0, $x1
# CHECK: renamable $w19 = COPY killed $w0, implicit-def $x19
name: sinkcopy8
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $x1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0, implicit-def $x19
Bcc 11, %bb.2, implicit $nzcv
bb.1:
liveins: $x0
$w19 = COPY $wzr
RET $x0
bb.2:
liveins: $w0, $x1, $x19
$w1 = ADDWrr $w1, $w0, implicit killed $x0
bb.3:
liveins: $x1, $x19
$x0 = ADDXrr $x1, $x19
RET $x0
...
---
# Don't sink w19 as w0 is defined in bb.0.
# CHECK-LABEL: name: donotsinkcopy1
# CHECK-LABEL: bb.0:
# CHECK: renamable $w19 = COPY $w0
# CHECK: $w0 = LDRWui $sp, 0
name: donotsinkcopy1
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
$w0 = LDRWui $sp, 0 :: (load (s32))
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
$x0 = COPY $xzr
RET $x0
bb.2:
liveins: $w0, $w19
$w0 = ADDWrr $w0, $w19
RET $x0
...
---
# Don't sink w19 as w19 is used in bb.0.
# CHECK-LABEL: name: donotsinkcopy2
# CHECK-LABEL: bb.0:
# CHECK: renamable $w19 = COPY $w0
# CHECK: STRWui $w1, $x19, 0
name: donotsinkcopy2
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
STRWui $w1, $x19, 0 :: (store (s32))
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
$x0 = COPY $xzr
RET $x0
bb.2:
liveins: $w0, $w19
$w0 = ADDWrr $w0, $w19
RET $x0
...
---
# Don't sink w19 as w19 is used in both %bb.1 and %bb.2.
# CHECK-LABEL: name: donotsinkcopy3
# CHECK-LABEL: bb.0:
# CHECK: renamable $w19 = COPY $w0
name: donotsinkcopy3
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
liveins: $w19
$w0 = COPY $w19
RET $x0
bb.2:
liveins: $w0, $w19
$w0 = ADDWrr $w0, $w19
RET $x0
...
---
# Don't sink w19 as %bb.2 has multiple predecessors.
# CHECK-LABEL: name: donotsinkcopy4
# CHECK-LABEL: bb.0:
# CHECK: renamable $w19 = COPY $w0
name: donotsinkcopy4
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
liveins: $w0
$w19 = COPY $w0
B %bb.2
bb.2:
liveins: $w0, $w19
$w0 = ADDWrr $w0, $w19
RET $x0
...
# Don't sink w19 after sinking w20.
# CHECK-LABEL: name: donotsinkcopy5
# CHECK-LABEL: bb.0:
# CHECK: renamable $w19 = COPY $w0
# CHECK-LABEL: bb.2:
# CHECK: liveins: $w0, $w19
# CHECK: renamable $w20 = COPY $w19
name: donotsinkcopy5
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY $w0
renamable $w20 = COPY $w19
Bcc 11, %bb.2, implicit $nzcv
bb.1:
liveins: $w19
$w0 = COPY $w19
RET $x0
bb.2:
liveins: $w0, $w20
$w0 = ADDWrr killed $w0, $w20
RET $x0
...
---
# Don't sink w19 as x19 is live-in in %bb.2.
# CHECK-LABEL: name: donotsinkcopy6
# CHECK-LABEL: bb.0:
name: donotsinkcopy6
tracksRegLiveness: true
body: |
bb.0:
liveins: $x0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $x19 = COPY $x0
Bcc 11, %bb.2, implicit $nzcv
B %bb.1
bb.1:
liveins: $w19
$w0 = COPY $w19
RET $x0
bb.2:
liveins: $x0, $x19
$x0 = ADDXrr $x0, $x19
RET $x0
...
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