1; RUN: opt < %s -S -loop-unroll -unroll-runtime | FileCheck %s 2target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64" 3target triple = "powerpc64-bgq-linux" 4 5define void @test1() nounwind { 6; Ensure that we don't crash when the trip count == -1. 7; CHECK-LABEL: @test1( 8entry: 9 br label %for.cond2.preheader 10 11for.cond2.preheader: ; preds = %for.end, %entry 12 br i1 false, label %middle.block, label %vector.ph 13 14vector.ph: ; preds = %for.cond2.preheader 15 br label %vector.body 16 17vector.body: ; preds = %vector.body, %vector.ph 18 br i1 undef, label %middle.block.loopexit, label %vector.body 19 20middle.block.loopexit: ; preds = %vector.body 21 br label %middle.block 22 23middle.block: ; preds = %middle.block.loopexit, %for.cond2.preheader 24 br i1 true, label %for.end, label %scalar.preheader 25 26scalar.preheader: ; preds = %middle.block 27 br label %for.body4 28 29for.body4: ; preds = %for.body4, %scalar.preheader 30 %indvars.iv = phi i64 [ 16000, %scalar.preheader ], [ %indvars.iv.next, %for.body4 ] 31 %indvars.iv.next = add i64 %indvars.iv, 1 32 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 33 %exitcond = icmp ne i32 %lftr.wideiv, 16000 34 br i1 %exitcond, label %for.body4, label %for.end.loopexit 35 36for.end.loopexit: ; preds = %for.body4 37 br label %for.end 38 39for.end: ; preds = %for.end.loopexit, %middle.block 40 br i1 undef, label %for.cond2.preheader, label %for.end15 41 42for.end15: ; preds = %for.end 43 ret void 44} 45