1; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime=true -unroll-count=4 | FileCheck %s 2 3;; Check that the remainder loop is properly assigned a branch weight for its latch branch. 4; CHECK-LABEL: @test( 5; CHECK-LABEL: for.body: 6; CHECK: br i1 [[COND1:%.*]], label %for.end.loopexit.unr-lcssa.loopexit, label %for.body, !prof ![[#PROF:]], !llvm.loop ![[#LOOP:]] 7; CHECK-LABEL: for.body.epil: 8; CHECK: br i1 [[COND2:%.*]], label %for.body.epil, label %for.end.loopexit.epilog-lcssa, !prof ![[#PROF2:]], !llvm.loop ![[#LOOP2:]] 9; CHECK: ![[#PROF]] = !{!"branch_weights", i32 1, i32 2499} 10; CHECK: ![[#PROF2]] = !{!"branch_weights", i32 1, i32 1} 11 12define i3 @test(ptr %a, i3 %n) { 13entry: 14 %cmp1 = icmp eq i3 %n, 0 15 br i1 %cmp1, label %for.end, label %for.body 16 17for.body: 18 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 19 %sum.02 = phi i3 [ %add, %for.body ], [ 0, %entry ] 20 %arrayidx = getelementptr inbounds i3, ptr %a, i64 %indvars.iv 21 %0 = load i3, ptr %arrayidx 22 %add = add nsw i3 %0, %sum.02 23 %indvars.iv.next = add i64 %indvars.iv, 1 24 %lftr.wideiv = trunc i64 %indvars.iv.next to i3 25 %exitcond = icmp eq i3 %lftr.wideiv, %n 26 br i1 %exitcond, label %for.end, label %for.body, !prof !0 27 28for.end: 29 %sum.0.lcssa = phi i3 [ 0, %entry ], [ %add, %for.body ] 30 ret i3 %sum.0.lcssa 31} 32 33!0 = !{!"branch_weights", i32 1, i32 9999} 34