; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py ; RUN: opt -disable-output "-passes=print" < %s 2>&1 | 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. define void @foo() { ; CHECK-LABEL: 'foo' ; CHECK-NEXT: Classifying expressions for: @foo ; CHECK-NEXT: %iv.i = phi i64 [ -5, %entry ], [ %iv.next.i, %loop ] ; CHECK-NEXT: --> -5 U: [-5,-4) S: [-5,-4) Exits: -5 LoopDispositions: { %loop: Invariant } ; CHECK-NEXT: %iv.next.i = add nsw i64 %iv.i, 0 ; CHECK-NEXT: --> -5 U: [-5,-4) S: [-5,-4) Exits: -5 LoopDispositions: { %loop: Invariant } ; CHECK-NEXT: Determining loop execution counts for: @foo ; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count. ; CHECK-NEXT: Loop %loop: Unpredictable constant max backedge-taken count. ; CHECK-NEXT: Loop %loop: Unpredictable symbolic max backedge-taken count. ; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count. ; 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 }