| Dan Gohman | 101a267 | 2009-04-21 20:18:36 +0000 | [diff] [blame^] | 1 | ; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \ |
| 2 | ; RUN: | grep {signextend \{0,+,199\}<bb> to i64} | count 2 |
| 3 | |
| 4 | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| 5 | target triple = "i386-apple-darwin9.6" |
| 6 | |
| 7 | define i64 @foo(i64* nocapture %x, i64 %n) nounwind { |
| 8 | entry: |
| 9 | %t0 = icmp sgt i64 %n, 0 ; <i1> [#uses=1] |
| 10 | br i1 %t0, label %bb, label %return |
| 11 | |
| 12 | bb: ; preds = %bb, %entry |
| 13 | %i.01 = phi i64 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2] |
| 14 | %t1 = shl i64 %i.01, 7 ; <i32> [#uses=1] |
| 15 | %t2 = ashr i64 %t1, 7 ; <i32> [#uses=1] |
| 16 | %s1 = shl i64 %i.01, 5 ; <i32> [#uses=1] |
| 17 | %s2 = ashr i64 %s1, 5 ; <i32> [#uses=1] |
| 18 | %t3 = getelementptr i64* %x, i64 %i.01 ; <i64*> [#uses=1] |
| 19 | store i64 0, i64* %t3, align 1 |
| 20 | %indvar.next = add i64 %i.01, 199 ; <i32> [#uses=2] |
| 21 | %exitcond = icmp eq i64 %indvar.next, %n ; <i1> [#uses=1] |
| 22 | br i1 %exitcond, label %return, label %bb |
| 23 | |
| 24 | return: ; preds = %bb, %entry |
| 25 | %p = phi i64 [ 0, %entry ], [ %t2, %bb ] |
| 26 | %q = phi i64 [ 0, %entry ], [ %s2, %bb ] |
| 27 | %v = xor i64 %p, %q |
| 28 | ret i64 %v |
| 29 | } |