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1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py2; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s3 4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"5target triple = "x86_64-apple-macosx10.9.0"6 7; Test that SCEV is capable of figuring out value of 'IV' that actually does not change.8define void @foo() {9; CHECK-LABEL: 'foo'10; CHECK-NEXT: Classifying expressions for: @foo11; CHECK-NEXT: %iv.i = phi i64 [ -5, %entry ], [ %iv.next.i, %loop ]12; CHECK-NEXT: --> -5 U: [-5,-4) S: [-5,-4) Exits: -5 LoopDispositions: { %loop: Invariant }13; CHECK-NEXT: %iv.next.i = add nsw i64 %iv.i, 014; CHECK-NEXT: --> -5 U: [-5,-4) S: [-5,-4) Exits: -5 LoopDispositions: { %loop: Invariant }15; CHECK-NEXT: Determining loop execution counts for: @foo16; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.17; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count.18; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count.19;20entry:21 br label %loop22 23loop:24 %iv.i = phi i64 [ -5, %entry ], [ %iv.next.i, %loop ]25 %iv.next.i = add nsw i64 %iv.i, 026 br label %loop27}28