| ; RUN: opt -analyze -scalar-evolution < %s -o - -S | FileCheck %s |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.9.0" |
| |
| ; Test that SCEV is capable of figuring out value of 'IV' that actually does not change. |
| ; CHECK: Classifying expressions for: @foo |
| ; CHECK: %iv.i = phi i64 |
| ; CHECK: -5 U: [-5,-4) S: [-5,-4) Exits: -5 LoopDispositions: { %loop: Invariant } |
| define void @foo() { |
| entry: |
| br label %loop |
| |
| loop: |
| %iv.i = phi i64 [ -5, %entry ], [ %iv.next.i, %loop ] |
| %iv.next.i = add nsw i64 %iv.i, 0 |
| br label %loop |
| } |
