1 ; RUN: opt < %s -loop-vectorize -force-vector-width=4 -verify-scev-maps -S |FileCheck %s 2 3 ; SCEV expansion uses existing value when the SCEV has no AddRec expr. 4 ; CHECK-LABEL: @foo( 5 ; CHECK: select 6 ; CHECK-NOT: select 7 ; CHECK: ret 8 9 @a = common global [1000 x i16] zeroinitializer, align 16 10 11 define i32 @foo(i32 %x, i32 %y) { 12 entry: 13 %cmp = icmp slt i32 %x, %y 14 %cond = select i1 %cmp, i32 %x, i32 %y 15 %cmp1.10 = icmp sgt i32 %cond, 0 16 br i1 %cmp1.10, label %for.body.lr.ph, label %for.end 17 18 for.body.lr.ph: ; preds = %entry 19 %tmp = sext i32 %cond to i64 20 br label %for.body 21 22 for.body: ; preds = %for.body, %for.body.lr.ph 23 %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] 24 %total.011 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ] 25 %arrayidx = getelementptr inbounds [1000 x i16], [1000 x i16]* @a, i64 0, i64 %indvars.iv 26 %tmp1 = load i16, i16* %arrayidx, align 2 27 %conv = sext i16 %tmp1 to i32 28 %add = add nsw i32 %conv, %total.011 29 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 30 %cmp1 = icmp slt i64 %indvars.iv.next, %tmp 31 br i1 %cmp1, label %for.body, label %for.end.loopexit 32 33 for.end.loopexit: ; preds = %for.body 34 %add.lcssa = phi i32 [ %add, %for.body ] 35 br label %for.end 36 37 for.end: ; preds = %for.end.loopexit, %entry 38 %total.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ] 39 ret i32 %total.0.lcssa 40 } 41
