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|
# RUN: llc -mtriple=aarch64-arm-none-eabi -run-pass=prologepilog \
# RUN: -run-pass=machine-outliner -verify-machineinstrs %s -o - | FileCheck %s
# Check that we save LR to a callee-saved register when possible.
# foo() should use a callee-saved register. However, bar() should not.
--- |
define void @foo() #0 {
ret void
}
define void @bar() #0 {
ret void
}
attributes #0 = { nounwind "sign-return-address"="non-leaf" "sign-return-address-key"="b_key" minsize noinline noredzone "frame-pointer"="all" }
...
---
# CHECK-LABEL: name: foo
# CHECK: bb.0:
# CHECK: frame-setup EMITBKEY
# CHECK-NEXT: frame-setup PACIBSP
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK: bb.1:
# CHECK: BL @[[OUTLINED_FUNCTION:OUTLINED_FUNCTION_[0-9]+]]
# CHECK: bb.2:
# CHECK: BL @[[OUTLINED_FUNCTION]]
# CHECK: bb.3:
# CHECK: BL @[[OUTLINED_FUNCTION]]
# CHECK: bb.4:
# CHECK: BL @[[OUTLINED_FUNCTION]]
# CHECK: bb.5:
# CHECK: frame-destroy AUTIBSP
# CHECK-NEXT: RET
name: foo
tracksRegLiveness: true
fixedStack:
body: |
bb.0:
$x25 = ORRXri $xzr, 1
$lr = ORRXri $xzr, 1
bb.1:
liveins: $lr, $w9
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 2
bb.2:
liveins: $lr, $w9
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 2
bb.3:
liveins: $lr, $w9
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 2
bb.4:
liveins: $lr, $w9
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 1
$w9 = ORRWri $wzr, 2
bb.5:
liveins: $w9
RET undef $lr
...
---
# CHECK: name: bar
# CHECK: bb.0:
# CHECK-NOT: OUTLINED_FUNCTION_
# CHECK: bb.1:
# CHECK-NOT: OUTLINED_FUNCTION_
# CHECK: bb.2:
# CHECK-NOT: OUTLINED_FUNCTION_
# CHECK: bb.3:
# CHECK-NOT: OUTLINED_FUNCTION_
# CHECK: RET
name: bar
tracksRegLiveness: true
body: |
bb.0:
liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w12 = ORRWri $wzr, 2
bb.1:
liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w12 = ORRWri $wzr, 2
bb.2:
liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w10 = ORRWri $wzr, 1
$w12 = ORRWri $wzr, 2
bb.3:
liveins: $lr, $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x19, $x20, $x21, $x22, $x23, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28
RET undef $lr
# CHECK: name: [[OUTLINED_FUNCTION]]
# CHECK: body:
# CHECK-NEXT: bb.0:
# CHECK-NOT: frame-setup EMITBKEY
# CHECK-NOT: frame-setup PACI{{[A,B]]}}SP
# CHECK-NOT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NOT: frame-destroy AUTI{{[A,B]]}}SP
|
