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# RUN: llc -o - %s -mtriple=arm-- -run-pass prologepilog | FileCheck %s
--- |
define swiftcc i8* @need_emergency_slot(i8 *swiftself %v) {
; Just a dummy to add a swiftself bit. The real code is in the MI below.
unreachable
}
...
---
# CHECK-LABEL: name: need_emergency_slot
# Make sure we do not just assume an unsaved/restored callee saved register
# is free to use. Callee saved parameters may still be used if they were used
# to pass arguments (as in swiftself).
name: need_emergency_slot
tracksRegLiveness: true
stack:
- { id: 0, type: default, size: 8, alignment: 8 }
- { id: 1, type: default, size: 4096, alignment: 8 }
body: |
bb.0:
liveins: %r10 ; swiftself parameter comes in as %r10
; Bring up register pressure to force emergency spilling, coax scavenging
; to use %r10 as that one is not spilled/restored.
%r0 = IMPLICIT_DEF
%r1 = IMPLICIT_DEF
%r2 = IMPLICIT_DEF
%r3 = IMPLICIT_DEF
%r4 = IMPLICIT_DEF
%r5 = IMPLICIT_DEF
%r6 = IMPLICIT_DEF
%r7 = IMPLICIT_DEF
%r8 = IMPLICIT_DEF
%r9 = IMPLICIT_DEF
%r11 = IMPLICIT_DEF
%r12 = IMPLICIT_DEF
%lr = IMPLICIT_DEF
; Computing the large stack offset requires an extra register. We should
; not just use %r10 for that.
; CHECK-NOT: STRi12 %1,{{.*}}%r10
STRi12 %r1, %stack.0, 0, 14, %noreg :: (store 4)
; use the swiftself parameter value.
KILL %r10
KILL %r0
KILL %r1
KILL %r2
KILL %r3
KILL %r4
KILL %r5
KILL %r6
KILL %r7
KILL %r8
KILL %r9
KILL %r11
KILL %r12
KILL %lr
...
|
