| Bill Wendling | dc17270 | 2013-08-05 23:43:18 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s |
| Dan Gohman | 430f0cc | 2009-07-21 23:03:19 +0000 | [diff] [blame] | 2 | ; PR4599 |
| 3 | |
| 4 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128" |
| 5 | |
| Bill Wendling | dc17270 | 2013-08-05 23:43:18 +0000 | [diff] [blame] | 6 | ; CHECK: Loop %for.body: backedge-taken count is (-1 + {{%?}}ecx) |
| 7 | |
| Dan Gohman | 430f0cc | 2009-07-21 23:03:19 +0000 | [diff] [blame] | 8 | define i32 @foo(i32 %ecx) nounwind { |
| 9 | entry: |
| 10 | %cmp2 = icmp eq i32 %ecx, 0 ; <i1> [#uses=1] |
| 11 | br i1 %cmp2, label %for.end, label %bb.nph |
| 12 | |
| 13 | for.cond: ; preds = %for.inc |
| 14 | %cmp = icmp ult i32 %inc, %ecx ; <i1> [#uses=1] |
| 15 | br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge |
| 16 | |
| 17 | for.cond.for.end_crit_edge: ; preds = %for.cond |
| 18 | %phitmp = add i32 %i.01, 2 ; <i32> [#uses=1] |
| 19 | br label %for.end |
| 20 | |
| 21 | bb.nph: ; preds = %entry |
| 22 | br label %for.body |
| 23 | |
| 24 | for.body: ; preds = %bb.nph, %for.cond |
| 25 | %i.01 = phi i32 [ %inc, %for.cond ], [ 0, %bb.nph ] ; <i32> [#uses=3] |
| 26 | %call = call i32 @bar(i32 %i.01) nounwind ; <i32> [#uses=0] |
| 27 | br label %for.inc |
| 28 | |
| 29 | for.inc: ; preds = %for.body |
| 30 | %inc = add i32 %i.01, 1 ; <i32> [#uses=2] |
| 31 | br label %for.cond |
| 32 | |
| 33 | for.end: ; preds = %for.cond.for.end_crit_edge, %entry |
| 34 | %i.0.lcssa = phi i32 [ %phitmp, %for.cond.for.end_crit_edge ], [ 1, %entry ] ; <i32> [#uses=1] |
| 35 | ret i32 %i.0.lcssa |
| 36 | } |
| 37 | |
| 38 | declare i32 @bar(i32) |