1; The i induction variable looks like a wrap-around, but it really is just 2; a simple affine IV. Make sure that indvars eliminates it. 3 4; RUN: opt < %s -indvars -S -enable-iv-rewrite | FileCheck %s 5; CHECK: phi 6; CHECK-NOT: phi 7 8define void @foo() { 9entry: 10 br label %bb6 11 12bb6: ; preds = %cond_true, %entry 13 %j.0 = phi i32 [ 1, %entry ], [ %tmp5, %cond_true ] ; <i32> [#uses=3] 14 %i.0 = phi i32 [ 0, %entry ], [ %j.0, %cond_true ] ; <i32> [#uses=1] 15 %tmp7 = call i32 (...)* @foo2( ) ; <i32> [#uses=1] 16 %tmp = icmp ne i32 %tmp7, 0 ; <i1> [#uses=1] 17 br i1 %tmp, label %cond_true, label %return 18 19cond_true: ; preds = %bb6 20 %tmp2 = call i32 (...)* @bar( i32 %i.0, i32 %j.0 ) ; <i32> [#uses=0] 21 %tmp5 = add i32 %j.0, 1 ; <i32> [#uses=1] 22 br label %bb6 23 24return: ; preds = %bb6 25 ret void 26} 27 28declare i32 @bar(...) 29 30declare i32 @foo2(...) 31 32