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; RUN: opt < %s -loop-unroll -unroll-runtime -unroll-count=2 -verify-scev-maps -S | FileCheck %s
; Check SCEV expansion uses existing value when unrolling an inner loop with runtime trip count in a loop nest.
; The outer loop gets unrolled twice, so we see 2 selects in the outer loop blocks.
; CHECK-LABEL: @foo(
; CHECK-LABEL: for.body.loopexit:
; CHECK: select
; CHECK-LABEL: for.body:
; CHECK: select
; CHECK-NOT: select
; CHECK: ret
define void @foo(i32 %xfL, i32 %scaleL) local_unnamed_addr {
entry:
br label %for.body
for.body: ; preds = %for.body5, %for.body, %entry
%xfL.addr.033 = phi i32 [ %xfL, %entry ], [ %add, %for.body5 ]
%add = add nsw i32 %xfL.addr.033, %scaleL
%shr = ashr i32 %add, 16
%cmp.i = icmp slt i32 10, %shr
%.sroa.speculated = select i1 %cmp.i, i32 0, i32 %shr
%cmp425 = icmp slt i32 0, %.sroa.speculated
br i1 %cmp425, label %for.body5.preheader, label %for.end
for.body5.preheader: ; preds = %for.body
%tmp0 = sext i32 %.sroa.speculated to i64
br label %for.body5
for.body5: ; preds = %for.body5, %for.body5.preheader
%indvars.iv = phi i64 [ 0, %for.body5.preheader ], [ %indvars.iv.next, %for.body5 ]
%indvars.iv.next = add nsw i64 %indvars.iv, 1
%cmp4 = icmp slt i64 %indvars.iv.next, %tmp0
br i1 %cmp4, label %for.body5, label %for.body
for.end:
ret void
}
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