1*9880d681SAndroid Build Coastguard Worker; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; We shouldn't generate a hardware loop in this case because the initial 4*9880d681SAndroid Build Coastguard Worker; value may be zero, which means the endloop instruction will not decrement 5*9880d681SAndroid Build Coastguard Worker; the loop counter, and the loop will execute only once. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: loop0 8*9880d681SAndroid Build Coastguard Worker 9*9880d681SAndroid Build Coastguard Workerdefine void @foo(i32 %count, i32 %v) #0 { 10*9880d681SAndroid Build Coastguard Workerentry: 11*9880d681SAndroid Build Coastguard Worker br label %do.body 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Workerdo.body: 14*9880d681SAndroid Build Coastguard Worker %count.addr.0 = phi i32 [ %count, %entry ], [ %dec, %do.body ] 15*9880d681SAndroid Build Coastguard Worker tail call void asm sideeffect "nop", ""() #1 16*9880d681SAndroid Build Coastguard Worker %dec = add i32 %count.addr.0, -1 17*9880d681SAndroid Build Coastguard Worker %cmp = icmp eq i32 %dec, 0 18*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %do.end, label %do.body 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Workerdo.end: 21*9880d681SAndroid Build Coastguard Worker ret void 22*9880d681SAndroid Build Coastguard Worker} 23