| Bill Wendling | a08bb49 | 2013-08-22 00:51:19 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -analyze -scalar-evolution 2>&1 | FileCheck %s |
| 2 | |
| 3 | ; CHECK: Loop %bb: backedge-taken count is (7 + (-1 * %argc)) |
| Nick Lewycky | 1c451ae | 2008-11-18 15:10:54 +0000 | [diff] [blame] | 4 | |
| 5 | define i32 @main(i32 %argc, i8** %argv) nounwind { |
| 6 | entry: |
| 7 | %0 = icmp ugt i32 %argc, 7 ; <i1> [#uses=1] |
| 8 | br i1 %0, label %bb2, label %bb.nph |
| 9 | |
| 10 | bb.nph: ; preds = %entry |
| 11 | br label %bb |
| 12 | |
| 13 | bb: ; preds = %bb.nph, %bb1 |
| 14 | %indvar = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i32> [#uses=2] |
| 15 | %argc_addr.04 = add i32 %indvar, %argc ; <i32> [#uses=1] |
| David Blaikie | 23af648 | 2015-04-16 23:24:18 +0000 | [diff] [blame] | 16 | tail call void (...) @Test() nounwind |
| Nick Lewycky | 1c451ae | 2008-11-18 15:10:54 +0000 | [diff] [blame] | 17 | %1 = add i32 %argc_addr.04, 1 ; <i32> [#uses=1] |
| 18 | br label %bb1 |
| 19 | |
| 20 | bb1: ; preds = %bb |
| 21 | %phitmp = icmp ugt i32 %1, 7 ; <i1> [#uses=1] |
| 22 | %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1] |
| 23 | br i1 %phitmp, label %bb1.bb2_crit_edge, label %bb |
| 24 | |
| 25 | bb1.bb2_crit_edge: ; preds = %bb1 |
| 26 | br label %bb2 |
| 27 | |
| 28 | bb2: ; preds = %bb1.bb2_crit_edge, %entry |
| 29 | ret i32 0 |
| 30 | } |
| 31 | |
| 32 | declare void @Test(...) |