| ; RUN: llc -mtriple=armv8-eabi -verify-machineinstrs %s -o /dev/null |
| |
| ; This test ensures that Loop Strength Reduction will |
| ; not create an Add Reccurence Expression if not all |
| ; its operands are loop invariants. |
| |
| define void @add_rec_expr() { |
| entry: |
| br label %loop0 |
| |
| loop0: |
| %c.0 = phi i32 [ 0, %entry ], [ %inc.0, %loop0 ] |
| %inc.0 = add nuw i32 %c.0, 1 |
| br i1 undef, label %loop0, label %bb1 |
| |
| bb1: |
| %mul.0 = mul i32 %c.0, %c.0 |
| %gelptr.0 = getelementptr inbounds i16, i16* undef, i32 %mul.0 |
| br label %loop1 |
| |
| loop1: |
| %inc.1 = phi i32 [ %inc.2, %bb4 ], [ 0, %bb1 ] |
| %mul.1 = mul i32 %inc.1, %c.0 |
| br label %bb3 |
| |
| bb3: |
| %add.0 = add i32 undef, %mul.1 |
| %gelptr.1 = getelementptr inbounds i16, i16* %gelptr.0, i32 %add.0 |
| store i16 undef, i16* %gelptr.1, align 2 |
| br label %bb4 |
| |
| bb4: |
| %inc.2 = add nuw i32 %inc.1, 1 |
| br label %loop1 |
| } |
