| ; 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 | |
| } |