| Sanjoy Das | b14010d | 2015-02-24 01:02:42 +0000 | [diff] [blame] | 1 | ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| 2 | |
| 3 | define i1 @main(i16 %a) { |
| 4 | ; CHECK-LABEL: Classifying expressions for: @main |
| 5 | entry: |
| 6 | br label %body |
| 7 | |
| 8 | body: |
| 9 | %dec2 = phi i16 [ %a, %entry ], [ %dec, %cond ] |
| 10 | %dec = add i16 %dec2, -1 |
| 11 | %conv2 = zext i16 %dec2 to i32 |
| 12 | %conv = zext i16 %dec to i32 |
| 13 | ; CHECK: %conv = zext i16 %dec to i32 |
| 14 | ; CHECK-NEXT: --> {(zext i16 (-1 + %a) to i32),+,65535}<nuw><%body> |
| 15 | ; CHECK-NOT: --> {(65535 + (zext i16 %a to i32)),+,65535}<nuw><%body> |
| 16 | |
| 17 | br label %cond |
| 18 | |
| 19 | cond: |
| 20 | br i1 false, label %body, label %exit |
| 21 | |
| 22 | exit: |
| 23 | %ret = icmp ne i32 %conv, 0 |
| 24 | ret i1 %ret |
| 25 | } |