| ; 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 |
| |
| define void @x(ptr %cond) { |
| ; CHECK-LABEL: 'x' |
| ; CHECK-NEXT: Classifying expressions for: @x |
| ; CHECK-NEXT: %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ] |
| ; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-128) S: [0,-128) Exits: <<Unknown>> LoopDispositions: { %loop: Computable } |
| ; CHECK-NEXT: %idx.inc = add nsw i8 %idx, 1 |
| ; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable } |
| ; CHECK-NEXT: %c = load volatile i1, ptr %cond, align 1 |
| ; CHECK-NEXT: --> %c U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant } |
| ; CHECK-NEXT: Determining loop execution counts for: @x |
| ; 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: |
| %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ] |
| |
| %idx.inc = add nsw i8 %idx, 1 |
| |
| %c = load volatile i1, ptr %cond |
| br i1 %c, label %loop, label %exit |
| |
| exit: |
| ret void |
| } |
| |
| define void @y(ptr %addr) { |
| ; CHECK-LABEL: 'y' |
| ; CHECK-NEXT: Classifying expressions for: @y |
| ; CHECK-NEXT: %idx = phi i8 [ -5, %entry ], [ %idx.inc, %loop ] |
| ; CHECK-NEXT: --> {-5,+,1}<nsw><%loop> U: [-5,6) S: [-5,6) Exits: 5 LoopDispositions: { %loop: Computable } |
| ; CHECK-NEXT: %idx.inc = add i8 %idx, 1 |
| ; CHECK-NEXT: --> {-4,+,1}<nsw><%loop> U: [-4,7) S: [-4,7) Exits: 6 LoopDispositions: { %loop: Computable } |
| ; CHECK-NEXT: Determining loop execution counts for: @y |
| ; CHECK-NEXT: Loop %loop: backedge-taken count is 10 |
| ; CHECK-NEXT: Loop %loop: constant max backedge-taken count is 10 |
| ; CHECK-NEXT: Loop %loop: symbolic max backedge-taken count is 10 |
| ; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is 10 |
| ; CHECK-NEXT: Predicates: |
| ; CHECK: Loop %loop: Trip multiple is 11 |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %idx = phi i8 [-5, %entry ], [ %idx.inc, %loop ] |
| |
| %idx.inc = add i8 %idx, 1 |
| |
| %continue = icmp slt i8 %idx.inc, 6 |
| br i1 %continue, label %loop, label %exit |
| |
| exit: |
| ret void |
| } |