The Nest
Explore
0
Compiler projects using llvm 
# RUN: llc -mtriple powerpc64le-unknown-linux-gnu -x mir -mcpu=pwr8 -mattr=-altivec \
# RUN: -run-pass=prologepilog --verify-machineinstrs < %s | \
# RUN: FileCheck %s --check-prefixes=CHECK,SAVEONE

# RUN: llc -mtriple powerpc64-unknown-linux-gnu -x mir -mcpu=pwr7 -mattr=-altivec \
# RUN: -run-pass=prologepilog --verify-machineinstrs < %s | \
# RUN: FileCheck %s --check-prefixes=CHECK,SAVEALL


# RUN: llc -mtriple powerpc64-unknown-aix-xcoff -x mir -mcpu=pwr4 -mattr=-altivec \
# RUN: -run-pass=prologepilog --verify-machineinstrs < %s | \
# RUN: FileCheck %s --check-prefixes=CHECK,SAVEALL

---
name:            CRAllSave
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$x3', virtual-reg: '' }
body:             |
  bb.0.entry:
    liveins: $x3
    renamable $x29 = ANDI8_rec killed renamable $x3, 1, implicit-def dead $cr0, implicit-def $cr0gt
    renamable $cr2lt = COPY $cr0gt
    renamable $cr4lt = COPY $cr0gt
    renamable $x3 = COPY $x29
    BLR8 implicit $lr8, implicit $rm, implicit $x3

    ; CHECK-LABEL: fixedStack:
    ; CHECK-NEXT:     - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
    ; CHECK-NEXT:         callee-saved-register: '$x29', callee-saved-restored: true, debug-info-variable: '',
    ; CHECK-NEXT:         debug-info-expression: '', debug-info-location: '' }
    ; CHECK-NEXT:     - { id: 1, type: default, offset: 8, size: 4, alignment: 8, stack-id: default,
    ; CHECK-NEXT:         isImmutable: true, isAliased: false, callee-saved-register: '$cr4',
    ; CHECK-NEXT:         callee-saved-restored: true, debug-info-variable: '', debug-info-expression: '',
    ; CHECK-NEXT:         debug-info-location: '' }
    ; CHECK-LABEL:  stack:

    ; Verify the proper live-ins have been added in the prologue.
    ; CHECK:    liveins: $x3, $x29, $cr2, $cr4

    ; CHECK:     $x12 = MFCR8 implicit killed $cr2, implicit killed $cr4
    ; CHECK-DAG: STD killed $x29, -24, $x1 :: (store (s64) into %fixed-stack.0)
    ; CHECK-DAG: STW8 killed $x12, 8, $x1

    ; CHECK:     $x29 = LD -24, $x1 :: (load (s64) from %fixed-stack.0)
    ; CHECK:     $x12 = LWZ8 8, $x1
    ; CHECK:     $cr2 = MTOCRF8 $x12
    ; CHECK:     $cr4 = MTOCRF8 killed $x12

...
---
name:            CR2Save
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$x3', virtual-reg: '' }
body:             |
  bb.0.entry:
    liveins: $x3
    renamable $x14 = ANDI8_rec killed renamable $x3, 1, implicit-def dead $cr0, implicit-def $cr0gt
    renamable $cr2lt = COPY $cr0gt
    renamable $x3 = COPY $x14
    BLR8 implicit $lr8, implicit $rm, implicit $x3

    ; CHECK-LABEL: CR2Save

    ; CHECK-LABEL: fixedStack:
    ; CHECK-NEXT:   - { id: 0, type: spill-slot, offset: -144, size: 8, alignment: 16, stack-id: default,
    ; CHECK-NEXT:       callee-saved-register: '$x14', callee-saved-restored: true, debug-info-variable: '',
    ; CHECK-NEXT:       debug-info-expression: '', debug-info-location: '' }
    ; CHECK-NEXT:   - { id: 1, type: default, offset: 8, size: 4, alignment: 8, stack-id: default,
    ; CHECK-NEXT:       isImmutable: true, isAliased: false, callee-saved-register: '$cr2',
    ; CHECK-NEXT:       callee-saved-restored: true, debug-info-variable: '', debug-info-expression: '',
    ; CHECK-NEXT:       debug-info-location: '' }
    ; CHECK-LABEL:  stack:

    ; Verify the proper live-ins have been added in the prologue.
    ; CHECK:    liveins: $x3, $x14, $cr2

    ; ELF V2 ABI allows saving only the clobbered cr fields,
    ; whereas the other ABIs do not.
    ; SAVEONE:     $x12 = MFOCRF8 killed $cr2
    ; SAVEALL:     $x12 = MFCR8 implicit killed $cr2

    ; CHECK-DAG: STD killed $x14, -144, $x1 :: (store (s64) into %fixed-stack.0, align 16)
    ; CHECK-DAG: STW8 killed $x12, 8, $x1

    ; CHECK:     $x14 = LD -144, $x1 :: (load (s64) from %fixed-stack.0, align 16)
    ; CHECK:     $x12 = LWZ8 8, $x1
    ; CHECK:     $cr2 = MTOCRF8 killed $x12


...