# RUN: llc -o - %s -start-after=if-converter | FileCheck %s
--- |
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
%struct.rwlock_t.0.22.58.68.242.244 = type {}
@tasklist_lock = external global %struct.rwlock_t.0.22.58.68.242.244, align 1
; Function Attrs: nounwind
define void @mm_update_next_owner(ptr %p1, ptr %p2) #0 {
entry:
%0 = load ptr, ptr %p1, align 8
br i1 undef, label %do.body.92, label %for.body.21
for.body.21: ; preds = %entry
unreachable
do.body.92: ; preds = %entry
%usage = getelementptr inbounds i8, ptr %0, i64 -48
%call95 = tail call signext i32 @__raw_read_unlock(ptr nonnull @tasklist_lock) #1
store volatile i32 0, ptr %p2, align 4
tail call void asm sideeffect "#compiler barrier", "~{memory}"() #1
%1 = tail call i32 asm sideeffect "\0Alwsync \0A1:\09lwarx\09$0,0,$1\09\09# atomic_dec_return\0A\09addic\09$0,$0,-1\0A\09stwcx.\09$0,0,$1\0A\09bne-\091b\0Async \0A", "=&r,r,~{cc},~{xer},~{memory}"(ptr %usage) #1
%cmp.i = icmp eq i32 %1, 0
br i1 %cmp.i, label %if.then.i, label %put_task_struct.exit
if.then.i: ; preds = %do.body.92
unreachable
put_task_struct.exit: ; preds = %do.body.92
ret void
}
declare signext i32 @__raw_read_unlock(...)
attributes #0 = { nounwind "target-cpu"="pwr7" }
attributes #1 = { nounwind }
...
---
name: mm_update_next_owner
alignment: 16
exposesReturnsTwice: false
tracksRegLiveness: true
liveins:
- { reg: '$x3' }
- { reg: '$x4' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 144
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: true
hasCalls: true
maxCallFrameSize: 112
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$x30' }
- { id: 1, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$x29' }
body: |
bb.0.entry:
liveins: $x3, $x4, $x29, $x30, $x29, $x30
$x0 = MFLR8 implicit $lr8
STD $x0, 16, $x1
$x1 = STDU $x1, -144, $x1
STD killed $x29, 120, $x1 :: (store (s64) into %fixed-stack.1)
STD killed $x30, 128, $x1 :: (store (s64) into %fixed-stack.0, align 16)
$x30 = OR8 $x4, $x4
$x3 = LD 0, killed $x3 :: (load (s64) from %ir.p1)
$x29 = ADDI8 killed $x3, -48
$x3 = ADDIStocHA8 $x2, @tasklist_lock
$x3 = LDtocL @tasklist_lock, killed $x3, implicit $x2 :: (load (s64) from got)
BL8_NOP @__raw_read_unlock, csr_ppc64_altivec, implicit-def $lr8, implicit $rm, implicit $x3, implicit $x2, implicit-def $r1, implicit-def dead $x3
$r3 = LI 0
STW killed $r3, 0, killed $x30 :: (volatile store (s32) into %ir.p2)
INLINEASM &"#compiler barrier", 25
INLINEASM &"\0Alwsync \0A1:\09lwarx\09$0,0,$1\09\09# atomic_dec_return\0A\09addic\09$0,$0,-1\0A\09stwcx.\09$0,0,$1\0A\09bne-\091b\0Async \0A", 25, 131083, def early-clobber $r3, 851977, killed $x29, 12, implicit-def dead early-clobber $cr0
; CHECK-LABEL: @mm_update_next_owner
; CHECK-NOT: lwarx 29, 0, 29
; CHECK-NOT: stwcx. 29, 0, 29
$cr0 = CMPLWI killed $r3, 0
$x30 = LD 128, $x1 :: (load (s64) from %fixed-stack.0, align 16)
$x29 = LD 120, $x1 :: (load (s64) from %fixed-stack.1)
$x1 = ADDI8 $x1, 144
$x0 = LD 16, $x1
MTLR8 $x0, implicit-def $lr8
BLR8 implicit $lr8, implicit $rm
...
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