1 # RUN: not llc -march=x86-64 -start-after prologepilog -stop-after prologepilog -o /dev/null %s 2>&1 | FileCheck %s 2 3 --- | 4 5 define i32 @compute(i32 %a) { 6 body: 7 ret i32 %a 8 } 9 10 define i32 @func(i32 %a) { 11 entry: 12 %b = alloca i32 13 store i32 %a, i32* %b 14 br label %check 15 16 check: 17 %comp = icmp sle i32 %a, 10 18 br i1 %comp, label %loop, label %exit 19 20 loop: 21 %c = load i32, i32* %b 22 %d = call i32 @compute(i32 %c) 23 %e = sub i32 %d, 1 24 store i32 %e, i32* %b 25 br label %check 26 27 exit: 28 ret i32 0 29 } 30 31 ... 32 --- 33 name: compute 34 tracksRegLiveness: true 35 body: | 36 bb.0.body: 37 liveins: %edi 38 39 %eax = COPY killed %edi 40 RETQ killed %eax 41 ... 42 --- 43 name: func 44 tracksRegLiveness: true 45 frameInfo: 46 stackSize: 24 47 maxAlignment: 4 48 adjustsStack: true 49 hasCalls: true 50 fixedStack: 51 # CHECK: [[@LINE+1]]:93: expected a named register 52 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '%0' } 53 stack: 54 - { id: 0, name: b, offset: -20, size: 4, alignment: 4 } 55 body: | 56 bb.0.entry: 57 successors: %bb.1.check 58 liveins: %edi, %rbx 59 60 frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp 61 %rsp = frame-setup SUB64ri8 %rsp, 16, implicit-def dead %eflags 62 %ebx = COPY %edi 63 MOV32mr %rsp, 1, _, 12, _, %ebx 64 65 bb.1.check: 66 successors: %bb.2.loop, %bb.3.exit 67 liveins: %ebx 68 69 CMP32ri8 %ebx, 10, implicit-def %eflags 70 JG_1 %bb.3.exit, implicit killed %eflags 71 JMP_1 %bb.2.loop 72 73 bb.2.loop: 74 successors: %bb.1.check 75 liveins: %ebx 76 77 %edi = MOV32rm %rsp, 1, _, 12, _ 78 CALL64pcrel32 @compute, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax 79 %eax = DEC32r killed %eax, implicit-def dead %eflags 80 MOV32mr %rsp, 1, _, 12, _, killed %eax 81 JMP_1 %bb.1.check 82 83 bb.3.exit: 84 %eax = MOV32r0 implicit-def dead %eflags 85 %rsp = ADD64ri8 %rsp, 16, implicit-def dead %eflags 86 %rbx = POP64r implicit-def %rsp, implicit %rsp 87 RETQ %eax 88 ... 89
