| ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| |
| define void @f(i1 %c) { |
| ; CHECK-LABEL: Classifying expressions for: @f |
| entry: |
| %start = select i1 %c, i32 100, i32 0 |
| %step = select i1 %c, i32 -1, i32 1 |
| br label %loop |
| |
| loop: |
| %iv = phi i32 [ %start, %entry ], [ %iv.dec, %loop ] |
| %iv.tc = phi i32 [ 0, %entry ], [ %iv.tc.inc, %loop ] |
| %iv.tc.inc = add i32 %iv.tc, 1 |
| %iv.dec = add nsw i32 %iv, %step |
| %iv.sext = sext i32 %iv to i64 |
| ; CHECK: %iv.sext = sext i32 %iv to i64 |
| ; CHECK-NEXT: --> {(sext i32 %start to i64),+,(sext i32 %step to i64)}<nsw><%loop> |
| %be = icmp ne i32 %iv.tc.inc, 100 |
| br i1 %be, label %loop, label %leave |
| |
| leave: |
| ret void |
| } |
