| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py |
| ; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %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: <multiple exits> 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 |
| } |