1 # RUN: llc -mtriple=arm-linux-unknown-gnueabi -start-after branch-folder -stop-after branch-folder -o - %s | FileCheck %s 2 3 --- | 4 declare void @dummy_use(i32*, i32) 5 6 define void @test_basic() #0 { 7 entry: 8 %mem = alloca i32, i32 10 9 call void @dummy_use(i32* %mem, i32 10) 10 ret void 11 } 12 13 attributes #0 = { "split-stack" } 14 ... 15 --- 16 name: test_basic 17 tracksRegLiveness: true 18 frameInfo: 19 stackSize: 48 20 maxAlignment: 4 21 adjustsStack: true 22 hasCalls: true 23 stack: 24 - { id: 0, name: mem, offset: -48, size: 40, alignment: 4 } 25 - { id: 1, type: spill-slot, offset: -4, size: 4, alignment: 4, 26 callee-saved-register: '%lr' } 27 - { id: 2, type: spill-slot, offset: -8, size: 4, alignment: 4, 28 callee-saved-register: '%r11' } 29 body: | 30 bb.0: 31 successors: %bb.2, %bb.1 32 liveins: %r11, %lr 33 34 %sp = STMDB_UPD %sp, 14, _, %r4, %r5 35 CFI_INSTRUCTION .cfi_def_cfa_offset 8 36 CFI_INSTRUCTION .cfi_offset %r5, -4 37 CFI_INSTRUCTION .cfi_offset %r4, -8 38 %r5 = MOVr %sp, 14, _, _ 39 %r4 = MRC 15, 0, 13, 0, 3, 14, _ 40 %r4 = LDRi12 %r4, 4, 14, _ 41 CMPrr %r4, %r5, 14, _, implicit-def %cpsr 42 Bcc %bb.2, 3, %cpsr 43 44 bb.1: 45 successors: %bb.2 46 liveins: %r11, %lr 47 48 %r4 = MOVi 48, 14, _, _ 49 %r5 = MOVi 0, 14, _, _ 50 %sp = STMDB_UPD %sp, 14, _, %lr 51 CFI_INSTRUCTION .cfi_def_cfa_offset 12 52 CFI_INSTRUCTION .cfi_offset %lr, -12 53 BL $__morestack, implicit-def %lr, implicit %sp 54 %sp = LDMIA_UPD %sp, 14, _, %lr 55 %sp = LDMIA_UPD %sp, 14, _, %r4, %r5 56 CFI_INSTRUCTION .cfi_def_cfa_offset 0 57 BX_RET 14, _ 58 59 bb.2: 60 liveins: %r11, %lr 61 62 %sp = LDMIA_UPD %sp, 14, _, %r4, %r5 63 CFI_INSTRUCTION .cfi_def_cfa_offset 0 64 ; CHECK: CFI_INSTRUCTION .cfi_same_value %r4 65 ; CHECK-NEXT: CFI_INSTRUCTION .cfi_same_value %r5 66 CFI_INSTRUCTION .cfi_same_value %r4 67 CFI_INSTRUCTION .cfi_same_value %r5 68 %sp = frame-setup STMDB_UPD %sp, 14, _, killed %r11, killed %lr 69 frame-setup CFI_INSTRUCTION .cfi_def_cfa_offset 8 70 frame-setup CFI_INSTRUCTION .cfi_offset %lr, -4 71 frame-setup CFI_INSTRUCTION .cfi_offset %r11, -8 72 %sp = frame-setup SUBri killed %sp, 40, 14, _, _ 73 frame-setup CFI_INSTRUCTION .cfi_def_cfa_offset 48 74 %r0 = MOVr %sp, 14, _, _ 75 %r1 = MOVi 10, 14, _, _ 76 BL @dummy_use, csr_aapcs, implicit-def dead %lr, implicit %sp, implicit %r0, implicit killed %r1, implicit-def %sp 77 %sp = ADDri killed %sp, 40, 14, _, _ 78 %sp = LDMIA_UPD %sp, 14, _, %r4, %r5 79 MOVPCLR 14, _ 80 ... 81
