| ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| |
| define i1 @main(i16 %a) { |
| ; CHECK-LABEL: Classifying expressions for: @main |
| entry: |
| br label %body |
| |
| body: |
| %dec2 = phi i16 [ %a, %entry ], [ %dec, %cond ] |
| %dec = add i16 %dec2, -1 |
| %conv2 = zext i16 %dec2 to i32 |
| %conv = zext i16 %dec to i32 |
| ; CHECK: %conv = zext i16 %dec to i32 |
| ; CHECK-NEXT: --> {(zext i16 (-1 + %a) to i32),+,65535}<nuw><%body> |
| ; CHECK-NOT: --> {(65535 + (zext i16 %a to i32)),+,65535}<nuw><%body> |
| |
| br label %cond |
| |
| cond: |
| br i1 false, label %body, label %exit |
| |
| exit: |
| %ret = icmp ne i32 %conv, 0 |
| ret i1 %ret |
| } |