1; RUN: opt < %s -loop-unroll -unroll-runtime -unroll-count=2 -verify-scev-maps -S | FileCheck %s 2 3; Check SCEV expansion uses existing value when unrolling an inner loop with runtime trip count in a loop nest. 4; The outer loop gets unrolled twice, so we see 2 selects in the outer loop blocks. 5; CHECK-LABEL: @foo( 6; CHECK-LABEL: for.body.loopexit: 7; CHECK: select 8; CHECK-LABEL: for.body: 9; CHECK: select 10; CHECK-NOT: select 11; CHECK: ret 12 13define void @foo(i32 %xfL, i32 %scaleL) local_unnamed_addr { 14entry: 15 br label %for.body 16 17for.body: ; preds = %for.body5, %for.body, %entry 18 %xfL.addr.033 = phi i32 [ %xfL, %entry ], [ %add, %for.body5 ] 19 %add = add nsw i32 %xfL.addr.033, %scaleL 20 %shr = ashr i32 %add, 16 21 %cmp.i = icmp slt i32 10, %shr 22 %.sroa.speculated = select i1 %cmp.i, i32 0, i32 %shr 23 %cmp425 = icmp slt i32 0, %.sroa.speculated 24 br i1 %cmp425, label %for.body5.preheader, label %for.end 25 26for.body5.preheader: ; preds = %for.body 27 %tmp0 = sext i32 %.sroa.speculated to i64 28 br label %for.body5 29 30for.body5: ; preds = %for.body5, %for.body5.preheader 31 %indvars.iv = phi i64 [ 0, %for.body5.preheader ], [ %indvars.iv.next, %for.body5 ] 32 %indvars.iv.next = add nsw i64 %indvars.iv, 1 33 %cmp4 = icmp slt i64 %indvars.iv.next, %tmp0 34 br i1 %cmp4, label %for.body5, label %for.body 35 36for.end: 37 ret void 38} 39 40