| # 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(i8** %p1, i32* %p2) #0 { |
| entry: |
| %0 = load i8*, i8** %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, i8* %0, i64 -48 |
| %counter.i = bitcast i8* %usage to i32* |
| %call95 = tail call signext i32 bitcast (i32 (...)* @__raw_read_unlock to i32 (%struct.rwlock_t.0.22.58.68.242.244*)*)(%struct.rwlock_t.0.22.58.68.242.244* nonnull @tasklist_lock) #1 |
| store volatile i32 0, i32* %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,$1\0A\09bne-\091b\0Async \0A", "=&r,r,~{cc},~{xer},~{memory}"(i32* %counter.i) #1 |
| %cmp.i = icmp eq i32 %1, 0 |
| br i1 %cmp.i, label %if.then.i, label %put_task_struct.exit |
| |
| if.then.i: ; preds = %do.body.92 |
| unreachable |
| |
| put_task_struct.exit: ; preds = %do.body.92 |
| ret void |
| } |
| |
| declare signext i32 @__raw_read_unlock(...) |
| |
| attributes #0 = { nounwind "target-cpu"="pwr7" } |
| attributes #1 = { nounwind } |
| |
| ... |
| --- |
| name: mm_update_next_owner |
| alignment: 16 |
| exposesReturnsTwice: false |
| tracksRegLiveness: true |
| liveins: |
| - { reg: '$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 8 into %fixed-stack.1) |
| STD killed $x30, 128, $x1 :: (store 8 into %fixed-stack.0, align 16) |
| $x30 = OR8 $x4, $x4 |
| $x3 = LD 0, killed $x3 :: (load 8 from %ir.p1) |
| $x29 = ADDI8 killed $x3, -48 |
| $x3 = ADDIStocHA8 $x2, @tasklist_lock |
| $x3 = LDtocL @tasklist_lock, killed $x3, implicit $x2 :: (load 8 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 4 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 8 from %fixed-stack.0, align 16) |
| $x29 = LD 120, $x1 :: (load 8 from %fixed-stack.1) |
| $x1 = ADDI8 $x1, 144 |
| $x0 = LD 16, $x1 |
| MTLR8 $x0, implicit-def $lr8 |
| BLR8 implicit $lr8, implicit $rm |
| |
| ... |
