1; RUN: llc -verify-machineinstrs -mcpu=pwr7 < %s | FileCheck %s 2target datalayout = "E-m:e-i64:64-n32:64" 3target triple = "powerpc64-unknown-linux-gnu" 4 5%struct.inode.0.12.120 = type { ptr } 6%struct.kstat2.1.13.121 = type { i32 } 7%struct.task_struct.4.16.124 = type { ptr, %struct.atomic_t.2.14.122, ptr } 8%struct.atomic_t.2.14.122 = type { i32 } 9%struct.signal_struct.3.15.123 = type { i64 } 10%struct.pid.5.17.125 = type { ptr } 11 12; Function Attrs: nounwind 13define signext i32 @proc_task_getattr(ptr nocapture readonly %inode, ptr nocapture %stat) #0 { 14entry: 15 %call1.i = tail call ptr @get_pid_task(ptr undef, i32 zeroext 0) #0 16 br i1 undef, label %if.end, label %if.then 17 18if.then: ; preds = %entry 19 %0 = load i64, ptr undef, align 8 20 %conv.i = trunc i64 %0 to i32 21 %1 = load i32, ptr null, align 4 22 %add = add i32 %1, %conv.i 23 store i32 %add, ptr null, align 4 24 %counter.i.i = getelementptr inbounds %struct.task_struct.4.16.124, ptr %call1.i, i64 0, i32 1, i32 0 25 %2 = tail call i32 asm sideeffect "\09lwsync\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\0A\09sync\0A", "=&r,r,~{cr0},~{xer},~{memory}"(ptr %counter.i.i) #0 26 %cmp.i = icmp eq i32 %2, 0 27 br i1 %cmp.i, label %if.then.i, label %if.end 28 29; CHECK-LABEL: @proc_task_getattr 30; CHECK-NOT: stwcx. [[REG:[0-9]+]],0,[[REG]] 31; CHECK: blr 32 33if.then.i: ; preds = %if.then 34 tail call void @foo(ptr %call1.i) #0 35 unreachable 36 37if.end: ; preds = %if.then, %entry 38 ret i32 0 39} 40 41declare void @foo(ptr) 42 43declare ptr @get_pid_task(ptr, i32 zeroext) 44 45attributes #0 = { nounwind } 46 47