llvm/test/CodeGen/SystemZ/frame-26.mir

# RUN: llc -mtriple=s390x-linux-gnu -start-before=prolog-epilog %s -o - -print-after=prolog-epilog \
# RUN:  -verify-machineinstrs 2>&1 | FileCheck %s
#
# Test that R6 when used for an argument is modelled as being live throughout
# the function when not saved in the prologue..

# CHECK:      # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization (prolog-epilog) ***:
# CHECK-NEXT: # Machine code for function fun0:
# CHECK-LABEL: bb.0:
# CHECK: liveins:{{.*}} $r6d
# CHECK: STMG killed $r7d, killed $r15d
# CHECK: STG renamable $r6d
# CHECK: End machine code for function fun0.


--- |

  @g_181 = external dso_local global i32, align 4
  @g_1390 = external dso_local constant ptr, align 8

  define internal i8 @fun0(i8 %arg, i8 %arg1, i32 %arg2, i8 %arg3, ptr %arg4, float %F0, float %F1) #0 {
    ret i8 0
  }

  ; Same function but in a single block which will make the verifier complain
  ; if R6 is killed by the original store before the point where the
  ; RegScavenger inserts its (killing) store of R6.
  define internal i8 @fun1(i8 %arg, i8 %arg1, i32 %arg2, i8 %arg3, ptr %arg4) #0 {
    ret i8 0
  }

  attributes #0 = { "frame-pointer"="all" }

...
---
name:            fun0
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$r6d' }
  - { reg: '$f0s' }
  - { reg: '$f2s' }
frameInfo:
  maxAlignment:    8
stack:
  - { id: 0, size: 96, alignment: 8 }
  - { id: 1, size: 1960, alignment: 8 }
  - { id: 2, size: 8, alignment: 8 }
  - { id: 3, size: 320, alignment: 8 }
  - { id: 4, size: 4, alignment: 4 }
  - { id: 5, size: 8, alignment: 8 }
  - { id: 6, size: 8, alignment: 8 }
  - { id: 7, size: 4, alignment: 4 }
  - { id: 8, size: 8, alignment: 8 }
  - { id: 9, size: 4, alignment: 4 }
  - { id: 10, size: 8, alignment: 8 }
  - { id: 11, size: 8, alignment: 8 }
  - { id: 12, size: 8, alignment: 8 }
  - { id: 13, size: 8, alignment: 8 }
  - { id: 14, size: 24, alignment: 4 }
  - { id: 15, size: 4, alignment: 4 }
  - { id: 16, size: 1792, alignment: 8 }
  - { id: 17, size: 8, alignment: 8 }
  - { id: 18, size: 8, alignment: 8 }
  - { id: 19, size: 8, alignment: 8 }
  - { id: 20, size: 1, alignment: 2 }
  - { id: 21, size: 672, alignment: 8 }
  - { id: 22, size: 4, alignment: 4 }
  - { id: 23, size: 4, alignment: 4 }
  - { id: 24, size: 4, alignment: 4 }
  - { id: 25, size: 64, alignment: 8 }
machineFunctionInfo: {}
body:             |
  bb.0:
    liveins: $f0s, $f2s, $r6d

    STG killed renamable $r6d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r0d = LARL @g_181
    nofpexcept CEBR renamable $f0s, renamable $f2s, implicit-def $cc, implicit $fpc
    STG renamable $r0d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    BRC 15, 4, %bb.2, implicit killed $cc

  bb.1:
    liveins: $f2s, $r0d

    renamable $f0s = COPY killed renamable $f2s

  bb.2:
    liveins: $f0s, $r0d

    STE killed renamable $f0s, undef renamable $r1d, 0, $noreg :: (volatile store (s32) into `ptr undef`)
    renamable $r1d = nuw LA %stack.0, 16, $noreg
    renamable $r2d = nuw LA %stack.0, 24, $noreg
    renamable $r3d = LA %stack.0, 40, $noreg
    renamable $r4d = LARL @g_1390
    STG renamable $r4d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r5d = nuw LA %stack.0, 48, $noreg
    renamable $r14d = LA %stack.0, 72, $noreg
    renamable $r13d = LA %stack.0, 80, $noreg
    renamable $r12d = LA %stack.0, 56, $noreg
    renamable $r10d = LA %stack.0, 0, $noreg
    STG renamable $r10d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r9d = LA %stack.0, 64, $noreg
    renamable $r8d = LA %stack.0, 88, $noreg
    renamable $r7d = nuw LA %stack.0, 8, $noreg
    MVGHI %stack.1, 904, 0
    STG killed renamable $r9d, $noreg, 0, $noreg :: (store (s64) into `ptr null`)
    STG killed renamable $r3d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r14d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r7d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r1d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r4d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r2d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r5d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r8d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r12d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r13d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r10d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    $r2l = LHI 0
    STG killed renamable $r0d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    Return implicit $r2l

...
---
name:            fun1
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$r6d' }
frameInfo:
  maxAlignment:    8
stack:
  - { id: 0, size: 96, alignment: 8 }
  - { id: 1, size: 1960, alignment: 8 }
  - { id: 2, size: 8, alignment: 8 }
  - { id: 3, size: 320, alignment: 8 }
  - { id: 4, size: 4, alignment: 4 }
  - { id: 5, size: 8, alignment: 8 }
  - { id: 6, size: 8, alignment: 8 }
  - { id: 7, size: 4, alignment: 4 }
  - { id: 8, size: 8, alignment: 8 }
  - { id: 9, size: 4, alignment: 4 }
  - { id: 10, size: 8, alignment: 8 }
  - { id: 11, size: 8, alignment: 8 }
  - { id: 12, size: 8, alignment: 8 }
  - { id: 13, size: 8, alignment: 8 }
  - { id: 14, size: 24, alignment: 4 }
  - { id: 15, size: 4, alignment: 4 }
  - { id: 16, size: 1792, alignment: 8 }
  - { id: 17, size: 8, alignment: 8 }
  - { id: 18, size: 8, alignment: 8 }
  - { id: 19, size: 8, alignment: 8 }
  - { id: 20, size: 1, alignment: 2 }
  - { id: 21, size: 672, alignment: 8 }
  - { id: 22, size: 4, alignment: 4 }
  - { id: 23, size: 4, alignment: 4 }
  - { id: 24, size: 4, alignment: 4 }
  - { id: 25, size: 64, alignment: 8 }
machineFunctionInfo: {}
body:             |
  bb.0:
    liveins: $r6d

    STG killed renamable $r6d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r0d = LARL @g_181
    STG renamable $r0d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r1d = nuw LA %stack.0, 16, $noreg
    renamable $r2d = nuw LA %stack.0, 24, $noreg
    renamable $r3d = LA %stack.0, 40, $noreg
    renamable $r4d = LARL @g_1390
    STG renamable $r4d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r5d = nuw LA %stack.0, 48, $noreg
    renamable $r14d = LA %stack.0, 72, $noreg
    renamable $r13d = LA %stack.0, 80, $noreg
    renamable $r12d = LA %stack.0, 56, $noreg
    renamable $r10d = LA %stack.0, 0, $noreg
    STG renamable $r10d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    renamable $r9d = LA %stack.0, 64, $noreg
    renamable $r8d = LA %stack.0, 88, $noreg
    renamable $r7d = nuw LA %stack.0, 8, $noreg
    MVGHI %stack.1, 904, 0
    STG killed renamable $r9d, $noreg, 0, $noreg :: (store (s64) into `ptr null`)
    STG killed renamable $r3d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r14d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r7d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r1d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r4d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r2d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r5d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r8d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r12d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r13d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    STG killed renamable $r10d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    $r2l = LHI 0
    STG killed renamable $r0d, undef renamable $r1d, 0, $noreg :: (store (s64) into `ptr undef`)
    Return implicit $r2l

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