| Chandler Carruth | 49589f0 | 2012-07-02 18:37:59 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -analyze -scalar-evolution 2>&1 | not grep smax |
| Nick Lewycky | 59cff12 | 2008-07-12 07:41:32 +0000 | [diff] [blame] | 2 | ; PR2261 |
| 3 | |
| 4 | @lut = common global [256 x i8] zeroinitializer, align 32 ; <[256 x i8]*> [#uses=1] |
| 5 | |
| 6 | define void @foo(i32 %count, i32* %srcptr, i32* %dstptr) nounwind { |
| 7 | entry: |
| 8 | icmp sgt i32 %count, 0 ; <i1>:0 [#uses=1] |
| 9 | br i1 %0, label %bb.nph, label %return |
| 10 | |
| 11 | bb.nph: ; preds = %entry |
| 12 | br label %bb |
| 13 | |
| 14 | bb: ; preds = %bb1, %bb.nph |
| 15 | %j.01 = phi i32 [ %8, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=1] |
| 16 | load i32* %srcptr, align 4 ; <i32>:1 [#uses=2] |
| 17 | and i32 %1, 255 ; <i32>:2 [#uses=1] |
| 18 | and i32 %1, -256 ; <i32>:3 [#uses=1] |
| 19 | getelementptr [256 x i8]* @lut, i32 0, i32 %2 ; <i8*>:4 [#uses=1] |
| 20 | load i8* %4, align 1 ; <i8>:5 [#uses=1] |
| 21 | zext i8 %5 to i32 ; <i32>:6 [#uses=1] |
| 22 | or i32 %6, %3 ; <i32>:7 [#uses=1] |
| 23 | store i32 %7, i32* %dstptr, align 4 |
| 24 | add i32 %j.01, 1 ; <i32>:8 [#uses=2] |
| 25 | br label %bb1 |
| 26 | |
| 27 | bb1: ; preds = %bb |
| 28 | icmp slt i32 %8, %count ; <i1>:9 [#uses=1] |
| 29 | br i1 %9, label %bb, label %bb1.return_crit_edge |
| 30 | |
| 31 | bb1.return_crit_edge: ; preds = %bb1 |
| 32 | br label %return |
| 33 | |
| 34 | return: ; preds = %bb1.return_crit_edge, %entry |
| 35 | ret void |
| 36 | } |