1; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s 2; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s 3 4define void @f(i1 %c) { 5; CHECK-LABEL: Classifying expressions for: @f 6entry: 7 %start = select i1 %c, i32 100, i32 0 8 %step = select i1 %c, i32 -1, i32 1 9 br label %loop 10 11loop: 12 %iv = phi i32 [ %start, %entry ], [ %iv.dec, %loop ] 13 %iv.tc = phi i32 [ 0, %entry ], [ %iv.tc.inc, %loop ] 14 %iv.tc.inc = add i32 %iv.tc, 1 15 %iv.dec = add nsw i32 %iv, %step 16 %iv.sext = sext i32 %iv to i64 17; CHECK: %iv.sext = sext i32 %iv to i64 18; CHECK-NEXT: --> {(sext i32 %start to i64),+,(sext i32 %step to i64)}<nsw><%loop> 19 %be = icmp ne i32 %iv.tc.inc, 100 20 br i1 %be, label %loop, label %leave 21 22leave: 23 ret void 24} 25