1 # RUN: llc -o - %s -start-after=if-converter | FileCheck %s
4 target datalayout = "E-m:e-i64:64-n32:64"
5 target triple = "powerpc64-unknown-linux-gnu"
7 %struct.rwlock_t.0.22.58.68.242.244 = type {}
9 @tasklist_lock = external global %struct.rwlock_t.0.22.58.68.242.244, align 1
11 ; Function Attrs: nounwind
12 define void @mm_update_next_owner(ptr %p1, ptr %p2) #0 {
14 %0 = load ptr, ptr %p1, align 8
15 br i1 undef, label %do.body.92, label %for.body.21
17 for.body.21: ; preds = %entry
20 do.body.92: ; preds = %entry
21 %usage = getelementptr inbounds i8, ptr %0, i64 -48
22 %call95 = tail call signext i32 @__raw_read_unlock(ptr nonnull @tasklist_lock) #1
23 store volatile i32 0, ptr %p2, align 4
24 tail call void asm sideeffect "#compiler barrier", "~{memory}"() #1
25 %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,$1\0A\09bne-\091b\0Async \0A", "=&r,r,~{cc},~{xer},~{memory}"(ptr %usage) #1
26 %cmp.i = icmp eq i32 %1, 0
27 br i1 %cmp.i, label %if.then.i, label %put_task_struct.exit
29 if.then.i: ; preds = %do.body.92
32 put_task_struct.exit: ; preds = %do.body.92
36 declare signext i32 @__raw_read_unlock(...)
38 attributes #0 = { nounwind "target-cpu"="pwr7" }
39 attributes #1 = { nounwind }
43 name: mm_update_next_owner
45 exposesReturnsTwice: false
46 tracksRegLiveness: true
51 isFrameAddressTaken: false
52 isReturnAddressTaken: false
61 hasOpaqueSPAdjustment: false
63 hasMustTailInVarArgFunc: false
65 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$x30' }
66 - { id: 1, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$x29' }
69 liveins: $x3, $x4, $x29, $x30, $x29, $x30
71 $x0 = MFLR8 implicit $lr8
73 $x1 = STDU $x1, -144, $x1
74 STD killed $x29, 120, $x1 :: (store (s64) into %fixed-stack.1)
75 STD killed $x30, 128, $x1 :: (store (s64) into %fixed-stack.0, align 16)
77 $x3 = LD 0, killed $x3 :: (load (s64) from %ir.p1)
78 $x29 = ADDI8 killed $x3, -48
79 $x3 = ADDIStocHA8 $x2, @tasklist_lock
80 $x3 = LDtocL @tasklist_lock, killed $x3, implicit $x2 :: (load (s64) from got)
81 BL8_NOP @__raw_read_unlock, csr_ppc64_altivec, implicit-def $lr8, implicit $rm, implicit $x3, implicit $x2, implicit-def $r1, implicit-def dead $x3
83 STW killed $r3, 0, killed $x30 :: (volatile store (s32) into %ir.p2)
84 INLINEASM &"#compiler barrier", 25
85 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
86 ; CHECK-LABEL: @mm_update_next_owner
87 ; CHECK-NOT: lwarx 29, 0, 29
88 ; CHECK-NOT: stwcx. 29, 0, 29
89 $cr0 = CMPLWI killed $r3, 0
90 $x30 = LD 128, $x1 :: (load (s64) from %fixed-stack.0, align 16)
91 $x29 = LD 120, $x1 :: (load (s64) from %fixed-stack.1)
94 MTLR8 $x0, implicit-def $lr8
95 BLR8 implicit $lr8, implicit $rm