third_party/llvm-7.0/llvm/test/CodeGen/ARM/scavenging.mir

# RUN: llc -o - %s -mtriple=thumb-arm-none-eabi -mcpu=cortex-m0 -run-pass scavenger-test | FileCheck %s
---
# CHECK-LABEL: name: scavengebug0
# Make sure we are not spilling/using a physreg used in the very last
# instruction of the scavenging range.
# CHECK-NOT: tSTRi {{.*}}$r0,{{.*}}$r0
# CHECK-NOT: tSTRi {{.*}}$r1,{{.*}}$r1
# CHECK-NOT: tSTRi {{.*}}$r2,{{.*}}$r2
# CHECK-NOT: tSTRi {{.*}}$r3,{{.*}}$r3
# CHECK-NOT: tSTRi {{.*}}$r4,{{.*}}$r4
# CHECK-NOT: tSTRi {{.*}}$r5,{{.*}}$r5
# CHECK-NOT: tSTRi {{.*}}$r6,{{.*}}$r6
# CHECK-NOT: tSTRi {{.*}}$r7,{{.*}}$r7
name: scavengebug0
body: |
  bb.0:
    ; Bring up register pressure to force emergency spilling
    $r0 = IMPLICIT_DEF
    $r1 = IMPLICIT_DEF
    $r2 = IMPLICIT_DEF
    $r3 = IMPLICIT_DEF
    $r4 = IMPLICIT_DEF
    $r5 = IMPLICIT_DEF
    $r6 = IMPLICIT_DEF
    $r7 = IMPLICIT_DEF

    %0 : tgpr = IMPLICIT_DEF
    %0 = tADDhirr %0, $sp, 14, $noreg
    tSTRi $r0, %0, 0, 14, $noreg

    %1 : tgpr = IMPLICIT_DEF
    %1 = tADDhirr %1, $sp, 14, $noreg
    tSTRi $r1, %1, 0, 14, $noreg

    %2 : tgpr = IMPLICIT_DEF
    %2 = tADDhirr %2, $sp, 14, $noreg
    tSTRi $r2, %2, 0, 14, $noreg

    %3 : tgpr = IMPLICIT_DEF
    %3 = tADDhirr %3, $sp, 14, $noreg
    tSTRi $r3, %3, 0, 14, $noreg

    %4 : tgpr = IMPLICIT_DEF
    %4 = tADDhirr %4, $sp, 14, $noreg
    tSTRi $r4, %4, 0, 14, $noreg

    %5 : tgpr = IMPLICIT_DEF
    %5 = tADDhirr %5, $sp, 14, $noreg
    tSTRi $r5, %5, 0, 14, $noreg

    %6 : tgpr = IMPLICIT_DEF
    %6 = tADDhirr %6, $sp, 14, $noreg
    tSTRi $r6, %6, 0, 14, $noreg

    %7 : tgpr = IMPLICIT_DEF
    %7 = tADDhirr %7, $sp, 14, $noreg
    tSTRi $r7, %7, 0, 14, $noreg

    KILL $r0
    KILL $r1
    KILL $r2
    KILL $r3
    KILL $r4
    KILL $r5
    KILL $r6
    KILL $r7