| ; RUN: opt -indvars -S < %s | FileCheck %s |
| |
| define i32 @fn() { |
| entry: |
| ret i32 10 |
| } |
| |
| define i32 @test_nested2(i32 %tnr) { |
| ; CHECK-LABEL: test_nested2 |
| ; CHECK-NOT: %indvars.iv |
| ; CHECK: %i.0 |
| |
| ; indvars should not replace the i.0 variable with a new one; SCEVExpander |
| ; should determine that the old one is good to reuse. |
| |
| entry: |
| %res = alloca i32, align 4 |
| store volatile i32 0, i32* %res, align 4 |
| %call = call i32 @fn() |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc6, %entry |
| %i.0 = phi i32 [ 0, %entry ], [ %inc7, %for.inc6 ] |
| %cmp = icmp slt i32 %i.0, %call |
| br i1 %cmp, label %for.body, label %for.cond.cleanup |
| |
| for.cond.cleanup: ; preds = %for.cond |
| br label %for.end8 |
| |
| for.body: ; preds = %for.cond |
| br label %for.cond1 |
| |
| for.cond1: ; preds = %for.inc, %for.body |
| %j.0 = phi i32 [ 0, %for.body ], [ %inc5, %for.inc ] |
| %cmp2 = icmp slt i32 %j.0, %i.0 |
| br i1 %cmp2, label %for.body4, label %for.cond.cleanup3 |
| |
| for.cond.cleanup3: ; preds = %for.cond1 |
| br label %for.end |
| |
| for.body4: ; preds = %for.cond1 |
| %0 = load volatile i32, i32* %res, align 4 |
| %inc = add nsw i32 %0, 1 |
| store volatile i32 %inc, i32* %res, align 4 |
| br label %for.inc |
| |
| for.inc: ; preds = %for.body4 |
| %inc5 = add nsw i32 %j.0, 1 |
| br label %for.cond1 |
| |
| for.end: ; preds = %for.cond.cleanup3 |
| br label %for.inc6 |
| |
| for.inc6: ; preds = %for.end |
| %inc7 = add nsw i32 %i.0, 1 |
| br label %for.cond |
| |
| for.end8: ; preds = %for.cond.cleanup |
| %1 = load volatile i32, i32* %res, align 4 |
| %cmp9 = icmp eq i32 %1, 45 |
| %conv = zext i1 %cmp9 to i32 |
| ret i32 %conv |
| } |
