1 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S |FileCheck %s 2 ; SCEV expansion uses existing value or value + offset to reduce duplicate code expansion so foo should only generate one select inst after loop vectorization. 3 ; CHECK-LABEL: @foo( 4 ; CHECK: select 5 ; CHECK-NOT: select 6 7 @ySrcL = common global i8* null, align 8 8 @smL = common global i32 0, align 4 9 10 define void @foo(i32 %rwL, i32 %kL, i32 %xfL) { 11 entry: 12 %sub = add nsw i32 %rwL, -1 13 %shr = ashr i32 %xfL, 6 14 %cmp.i = icmp slt i32 %sub, %shr 15 %cond.i = select i1 %cmp.i, i32 %sub, i32 %shr 16 %cmp6 = icmp sgt i32 %cond.i, %kL 17 br i1 %cmp6, label %for.body.lr.ph, label %for.end 18 19 for.body.lr.ph: ; preds = %entry 20 %tmp = load i8*, i8** @ySrcL, align 8 21 %tmp1 = sext i32 %kL to i64 22 %tmp2 = sext i32 %cond.i to i64 23 br label %for.body 24 25 for.body: ; preds = %for.body, %for.body.lr.ph 26 %indvars.iv = phi i64 [ %tmp1, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] 27 %reduct.07 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ] 28 %arrayidx = getelementptr inbounds i8, i8* %tmp, i64 %indvars.iv 29 %tmp3 = load i8, i8* %arrayidx, align 1 30 %conv = zext i8 %tmp3 to i32 31 %add = add nsw i32 %conv, %reduct.07 32 %indvars.iv.next = add nsw i64 %indvars.iv, 1 33 %cmp = icmp slt i64 %indvars.iv.next, %tmp2 34 br i1 %cmp, label %for.body, label %for.end.loopexit 35 36 for.end.loopexit: ; preds = %for.body 37 %add.lcssa = phi i32 [ %add, %for.body ] 38 br label %for.end 39 40 for.end: ; preds = %for.end.loopexit, %entry 41 %reduct.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ] 42 store i32 %reduct.0.lcssa, i32* @smL, align 4 43 ret void 44 } 45
