| Sanjoy Das | 9e2c501 | 2015-03-04 22:24:17 +0000 | [diff] [blame] | 1 | ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| 2 | |
| 3 | define void @f(i1* %condition) { |
| 4 | ; CHECK-LABEL: Classifying expressions for: @f |
| 5 | entry: |
| 6 | br label %loop |
| 7 | |
| 8 | loop: |
| 9 | %idx = phi i32 [ 0, %entry ], [ %idx.inc, %loop ] |
| 10 | %idx.inc = add nsw i32 %idx, 1 |
| 11 | |
| 12 | %idx.inc2 = add i32 %idx.inc, 1 |
| 13 | %idx.inc2.zext = zext i32 %idx.inc2 to i64 |
| 14 | |
| 15 | ; CHECK: %idx.inc2.zext = zext i32 %idx.inc2 to i64 |
| 16 | ; CHECK-NEXT: --> {2,+,1}<nuw><%loop> |
| 17 | |
| 18 | %c = load volatile i1, i1* %condition |
| 19 | br i1 %c, label %loop, label %exit |
| 20 | |
| 21 | exit: |
| 22 | ret void |
| 23 | } |
| 24 | |
| 25 | define void @g(i1* %condition) { |
| 26 | ; CHECK-LABEL: Classifying expressions for: @g |
| 27 | entry: |
| 28 | br label %loop |
| 29 | |
| 30 | loop: |
| 31 | %idx = phi i32 [ 0, %entry ], [ %idx.inc, %loop ] |
| 32 | %idx.inc = add nsw i32 %idx, 3 |
| 33 | |
| 34 | %idx.inc2 = add i32 %idx.inc, -1 |
| 35 | %idx.inc2.sext = sext i32 %idx.inc2 to i64 |
| 36 | ; CHECK: %idx.inc2.sext = sext i32 %idx.inc2 to i64 |
| 37 | ; CHECK-NEXT: --> {2,+,3}<nuw><nsw><%loop> |
| 38 | |
| Sanjoy Das | 7e4a641 | 2016-05-29 00:32:17 +0000 | [diff] [blame] | 39 | %cond.gep = getelementptr inbounds i1, i1* %condition, i32 %idx.inc |
| 40 | %c = load volatile i1, i1* %cond.gep |
| Sanjoy Das | 9e2c501 | 2015-03-04 22:24:17 +0000 | [diff] [blame] | 41 | br i1 %c, label %loop, label %exit |
| 42 | |
| 43 | exit: |
| 44 | ret void |
| 45 | } |