# RUN: llc -mtriple=s390x-linux-gnu -start-before=prologepilog %s -o - -print-after=prologepilog \
# 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 (prologepilog) ***:
# 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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