llvm/test/CodeGen/SystemZ/frame-27.mir

# RUN: llc -mtriple=s390x-linux-gnu -start-before=prolog-epilog %s -o - -mcpu=z14 \
# RUN:   -debug-only=prolog-epilog -print-after=prolog-epilog -verify-machineinstrs 2>&1 \
# RUN:   | FileCheck %s
# REQUIRES: asserts
#
# Test that stack objects are ordered in a good way with respect to the
# displacement operands of users.

--- |
  define void @f1() { ret void }
  define void @f2() { ret void }
  define void @f3() { ret void }
  define void @f4() { ret void }
  define void @f5() { ret void }
  define void @f6() { ret void }

...

### Test that %stack.0 is placed close to its D12 user.
# CHECK:      alloc FI(1) at SP[-4255]
# CHECK-NEXT: alloc FI(0) at SP[-4271]
# CHECK-NEXT: alloc FI(2) at SP[-4280]
# CHECK-NEXT: alloc FI(3) at SP[-4288]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f1: IsSSA, NoPHIs, TracksLiveness, NoVRegs
# CHECK-NOT:  LAY
# CHECK:      VL32
---
name:            f1
tracksRegLiveness: true
stack:
  - { id: 0, size: 16 }
  - { id: 1, size: 4095 }
machineFunctionInfo: {}
body:             |
  bb.0:
    renamable $f0s = VL32 %stack.0, 0, $noreg
    Return

...

### Test that %stack.1 is placed close to its D12 user.
# CHECK:      alloc FI(0) at SP[-176]
# CHECK-NEXT: alloc FI(1) at SP[-4271]
# CHECK-NEXT: alloc FI(2) at SP[-4280]
# CHECK-NEXT: alloc FI(3) at SP[-4288]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f2: IsSSA, NoPHIs, TracksLiveness, NoVRegs
# CHECK-NOT:  LAY
# CHECK:      VL32
---
name:            f2
tracksRegLiveness: true
stack:
  - { id: 0, size: 16 }
  - { id: 1, size: 4095 }
machineFunctionInfo: {}
body:             |
  bb.0:
    renamable $f0s = VL32 %stack.1, 3916, $noreg
    Return

...

### Swap the order of the objects so that both accesses are in range.
# CHECK:      alloc FI(1) at SP[-8350]
# CHECK-NEXT: alloc FI(0) at SP[-12445]
# CHECK-NEXT: alloc FI(2) at SP[-12456]
# CHECK-NEXT: alloc FI(3) at SP[-12464]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f3: IsSSA, NoPHIs, TracksLiveness, NoVRegs
# CHECK-NOT:  LAY
# CHECK:      VL32
# CHECK-NOT:  LAY
# CHECK:      LEY
---
name:            f3
tracksRegLiveness: true
stack:
  - { id: 0, size: 4095 }
  - { id: 1, size: 8190 }
machineFunctionInfo: {}
body:             |
  bb.0:
    renamable $f0s = VL32 %stack.0, 0, $noreg
    renamable $f0s = LE %stack.1, 0, $noreg
    Return

...

### Reorder the objects so that all accesses are in range.
# CHECK:      alloc FI(0) at SP[-8350]
# CHECK-NEXT: alloc FI(2) at SP[-16540]
# CHECK-NEXT: alloc FI(3) at SP[-24730]
# CHECK-NEXT: alloc FI(1) at SP[-26777]
# CHECK-NEXT: alloc FI(4) at SP[-28824]
# CHECK-NEXT: alloc FI(5) at SP[-28832]
# CHECK-NEXT: alloc FI(6) at SP[-28840]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f4: IsSSA, NoPHIs, TracksLiveness, NoVRegs
# CHECK-NOT:  LAY
# CHECK:      LEY
# CHECK-NEXT: VL32
# CHECK-NEXT: LEY
# CHECK-NEXT: LEY
# CHECK-NEXT: VL32
---
name:            f4
tracksRegLiveness: true
stack:
  - { id: 0, size: 8190 }
  - { id: 1, size: 2047 }
  - { id: 2, size: 8190 }
  - { id: 3, size: 8190 }
  - { id: 4, size: 2047 }
machineFunctionInfo: {}
body:             |
  bb.0:
    renamable $f2s = LE %stack.0, 0, $noreg
    renamable $f0s = VL32 %stack.1, 0, $noreg
    renamable $f3s = LEY %stack.2, 0, $noreg
    renamable $f4s = LE %stack.3, 0, $noreg
    renamable $f1s = VL32 %stack.4, 0, $noreg
    Return

...

### Reorder the objects so that the VL32 object is in range and the LYs are
### shortened to Ls (STOC cannot be shortened).
# CHECK:      alloc FI(0) at SP[-8350]
# CHECK-NEXT: alloc FI(1) at SP[-16540]
# CHECK-NEXT: alloc FI(2) at SP[-24730]
# CHECK-NEXT: alloc FI(3) at SP[-26777]
# CHECK-NEXT: alloc FI(4) at SP[-26792]
# CHECK-NEXT: alloc FI(5) at SP[-26800]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f5: IsSSA, NoPHIs, TracksLiveness, NoVRegs
# CHECK-NOT:  LAY
# CHECK:      $r1l = L $r15
# CHECK-NEXT: $r1l = L $r15
# CHECK-NEXT: IMPLICIT_DEF
# CHECK-NEXT: STOC
# CHECK-NEXT: STOC
# CHECK-NEXT: VL32
---
name:            f5
tracksRegLiveness: true
stack:
  - { id: 0, size: 8190 }
  - { id: 1, size: 8190 }
  - { id: 2, size: 8190 }
  - { id: 3, size: 2047 }
machineFunctionInfo: {}
body:             |
  bb.0:
    $r1l = LY %stack.2, 0, $noreg
    $r1l = LY %stack.2, 0, $noreg
    $cc = IMPLICIT_DEF
    STOC $r1l, %stack.0, 0, 14, 8, implicit $cc
    STOC $r1l, %stack.1, 0, 14, 8, implicit $cc
    renamable $f3s = VL32 %stack.3, 0, $noreg
    Return

...

### Test handling of a variable sized object.
# CHECK:      alloc FI(1) at SP[-476]
# CHECK-NEXT: alloc FI(0) at SP[-776]
# CHECK-NEXT: alloc FI(2) at SP[-776]
# CHECK-NEXT: # *** IR Dump After Prologue/Epilogue Insertion & Frame Finalization
# CHECK-NEXT: # Machine code for function f6: IsSSA, NoPHIs, TracksLiveness, NoVRegs

# CHECK:  $r15d = AGHI $r15d(tied-def 0), -776, implicit-def dead $cc
# CHECK:  $r11d = LGR $r15d
# CHECK:  renamable $r2d = ADJDYNALLOC renamable $r1d, 0, $noreg
# CHECK:  VST64 renamable $f0d, $r11d, 160, $noreg
# CHECK:  VST32 renamable $f1s, $r11d, 460, $noreg
# CHECK:  VST32 killed renamable $f0s, killed renamable $r2d, 0, $noreg
---
name:            f6
tracksRegLiveness: true
stack:
  - { id: 0, size: 300 }
  - { id: 1, size: 316 }
  - { id: 2, type: variable-sized }
machineFunctionInfo: {}
body:             |
  bb.0 (%ir-block.0):
    liveins: $f0d, $f0s, $f1s, $r2l

    renamable $r2l = KILL $r2l, implicit-def $r2d
    renamable $r1d = RISBGN undef renamable $r1d, killed renamable $r2d, 30, 189, 2
    renamable $r0d = nuw LA killed renamable $r1d, 7, $noreg
    renamable $r0d = RISBGN undef renamable $r0d, killed renamable $r0d, 29, 188, 0
    renamable $r1d = SGRK $r15d, killed renamable $r0d, implicit-def dead $cc
    renamable $r2d = ADJDYNALLOC renamable $r1d, 0, $noreg
    $r15d = COPY killed renamable $r1d
    VST64 renamable $f0d, %stack.0, 0, $noreg
    VST32 renamable $f1s, %stack.1, 0, $noreg
    VST32 killed renamable $f0s, killed renamable $r2d, 0, $noreg
    Return

...