Wei Mi | a49559b | 2016-02-04 01:27:38 +0000 | [diff] [blame] | 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: select |
| 5 | ; CHECK-NOT: select |
| 6 | |
| 7 | @a = common global [1000 x i16] zeroinitializer, align 16 |
| 8 | |
| 9 | define i32 @foo(i32 %x, i32 %y) { |
| 10 | entry: |
| 11 | %cmp = icmp slt i32 %x, %y |
| 12 | %cond = select i1 %cmp, i32 %x, i32 %y |
| 13 | %cmp1.10 = icmp sgt i32 %cond, 0 |
| 14 | br i1 %cmp1.10, label %for.body.lr.ph, label %for.end |
| 15 | |
| 16 | for.body.lr.ph: ; preds = %entry |
| 17 | %tmp = sext i32 %cond to i64 |
| 18 | br label %for.body |
| 19 | |
| 20 | for.body: ; preds = %for.body, %for.body.lr.ph |
| 21 | %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] |
| 22 | %total.011 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ] |
| 23 | %arrayidx = getelementptr inbounds [1000 x i16], [1000 x i16]* @a, i64 0, i64 %indvars.iv |
| 24 | %tmp1 = load i16, i16* %arrayidx, align 2 |
| 25 | %conv = sext i16 %tmp1 to i32 |
| 26 | %add = add nsw i32 %conv, %total.011 |
| 27 | %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| 28 | %cmp1 = icmp slt i64 %indvars.iv.next, %tmp |
| 29 | br i1 %cmp1, label %for.body, label %for.end.loopexit |
| 30 | |
| 31 | for.end.loopexit: ; preds = %for.body |
| 32 | %add.lcssa = phi i32 [ %add, %for.body ] |
| 33 | br label %for.end |
| 34 | |
| 35 | for.end: ; preds = %for.end.loopexit, %entry |
| 36 | %total.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ] |
| 37 | ret i32 %total.0.lcssa |
| 38 | } |