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|
# RUN: llc -mtriple=aarch64--- -run-pass=machine-outliner %s -o - | FileCheck %s
--- |
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
#
# CHECK-LABEL: name: main
# CHECK: BL @OUTLINED_FUNCTION_[[F0:[0-9]+]]
# CHECK-NEXT: early-clobber %sp, %lr = LDRXpost %sp, 16
# CHECK-NEXT: STRHHroW %w16, %x9, %w30, 1, 1
# CHECK-NEXT: %lr = ORRXri %xzr, 1
# CHECK: BL @OUTLINED_FUNCTION_[[F0]]
# CHECK-NEXT: early-clobber %sp, %lr = LDRXpost %sp, 16
# CHECK-NEXT: STRHHroW %w16, %x9, %w30, 1, 1
# CHECK-NEXT: %lr = ORRXri %xzr, 1
# CHECK: BL @OUTLINED_FUNCTION_[[F0]]
# CHECK-NEXT: early-clobber %sp, %lr = LDRXpost %sp, 16
# CHECK-NEXT: STRHHroW %w16, %x9, %w30, 1, 1
# CHECK-NEXT: %lr = ORRXri %xzr, 1
name: main
body: |
bb.0:
%sp = frame-setup SUBXri %sp, 16, 0
%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
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
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
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.
# 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
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 = ORRWri %wzr, 1
%w17 = ORRWri %wzr, 1
BL @baz, implicit-def dead %lr, implicit %sp
%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
%w8 = ORRWri %wzr, 0
bb.2:
%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]}}
|
