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|
# RUN: llc -mtriple=aarch64--- -run-pass=prologepilog -run-pass=machine-outliner -verify-machineinstrs %s -o - | FileCheck %s
--- |
@x = common global i32 0, align 4
define void @baz() #0 {
ret void
}
define i32 @main() #0 {
ret i32 0
}
define void @bar(i32 %a) #0 {
ret void
}
attributes #0 = { noinline noredzone "no-frame-pointer-elim"="true" }
...
---
# This test ensures that we
# - Create outlined functions
# - Don't outline anything to do with LR or W30
# - Save LR when it's not available
# - Don't outline stack instructions when we might need to save + restore
# - Functions whose addresses are taken can still be outlined
#
# CHECK-LABEL: name: main
# CHECK: BL @OUTLINED_FUNCTION_[[F0:[0-9]+]]
# CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG:[0-9]+]], 0
# CHECK-NEXT: $x16 = ADDXri $sp, 48, 0
# CHECK-NEXT: STRHHroW $w16, $x9, $w30, 1, 1
# CHECK-NEXT: $lr = ORRXri $xzr, 1
# CHECK: BL @OUTLINED_FUNCTION_[[F0]]
# CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG]], 0
# CHECK-NEXT: $x16 = ADDXri $sp, 48, 0
# CHECK-NEXT: STRHHroW $w16, $x9, $w30, 1, 1
# CHECK-NEXT: $lr = ORRXri $xzr, 1
# CHECK: BL @OUTLINED_FUNCTION_[[F0]]
# CHECK-NEXT: $lr = ORRXrs $xzr, $x[[REG]], 0
# CHECK-NEXT: $x16 = ADDXri $sp, 48, 0
# CHECK-NEXT: STRHHroW $w16, $x9, $w30, 1, 1
# CHECK-NEXT: $lr = ORRXri $xzr, 1
name: main
tracksRegLiveness: true
body: |
bb.0:
$sp = frame-setup SUBXri $sp, 16, 0
renamable $x9 = ADRP target-flags(aarch64-page) @bar
$x9 = ORRXri $xzr, 1
$w16 = ORRWri $wzr, 1
$w30 = ORRWri $wzr, 1
$lr = ORRXri $xzr, 1
$x20, $x19 = LDPXi $sp, 10
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
renamable $x9 = ADRP target-flags(aarch64-page) @x
$x16 = ADDXri $sp, 48, 0;
STRHHroW $w16, $x9, $w30, 1, 1
$lr = ORRXri $xzr, 1
$w3 = ORRWri $wzr, 1993
$x20, $x19 = LDPXi $sp, 10
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
renamable $x9 = ADRP target-flags(aarch64-page) @x
$x16 = ADDXri $sp, 48, 0;
STRHHroW $w16, $x9, $w30, 1, 1
$lr = ORRXri $xzr, 1
$w4 = ORRWri $wzr, 1994
$x20, $x19 = LDPXi $sp, 10
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
$w16 = ORRWri $wzr, 1
renamable $x9 = ADRP target-flags(aarch64-page) @x
$x16 = ADDXri $sp, 48, 0;
STRHHroW $w16, $x9, $w30, 1, 1
$lr = ORRXri $xzr, 1
$sp = ADDXri $sp, 16, 0
RET undef $lr
...
---
# This test ensures that we can avoid saving LR when it's available.
# It also makes sure that KILL instructions don't impact outlining.
# CHECK-LABEL: bb.1:
# CHECK-NOT: BL @baz, implicit-def dead $lr, implicit $sp
# CHECK: BL @OUTLINED_FUNCTION_[[F1:[0-9]+]], implicit-def $lr, implicit $sp
# CHECK-NEXT: $w17 = ORRWri $wzr, 2
# CHECK-NEXT: BL @OUTLINED_FUNCTION_[[F1]], implicit-def $lr, implicit $sp
# CHECK-NEXT: $w8 = ORRWri $wzr, 0
# CHECK-NOT: $w17 = KILL renamable $w17, implicit killed $w17
name: bar
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $lr, $w8
$sp = frame-setup SUBXri $sp, 32, 0
$fp = frame-setup ADDXri $sp, 16, 0
bb.1:
BL @baz, implicit-def dead $lr, implicit $sp
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
$w17 = KILL renamable $w17, implicit killed $w17
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
BL @baz, implicit-def dead $lr, implicit $sp
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 2
BL @baz, implicit-def dead $lr, implicit $sp
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
BL @baz, implicit-def dead $lr, implicit $sp
$w17 = ORRWri $wzr, 1
$w17 = ORRWri $wzr, 1
$w8 = ORRWri $wzr, 0
bb.2:
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$x15 = ADDXri $sp, 48, 0;
$w9 = ORRWri $wzr, 0
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$w15 = ORRWri $wzr, 1
$x15 = ADDXri $sp, 48, 0;
$w8 = ORRWri $wzr, 0
bb.3:
$fp, $lr = LDPXi $sp, 2
$sp = ADDXri $sp, 32, 0
RET undef $lr
...
---
name: baz
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $lr, $w8
RET undef $lr
# CHECK-LABEL: name: OUTLINED_FUNCTION_{{[0-9]}}
# CHECK=LABEL: name: OUTLINED_FUNCTION_{{[1-9]}}
|
