| # 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 | |
| ... |