1 ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s 2 3 ; This loop has no preheader, multiple backedges, etc., but ScalarEvolution 4 ; should still be able to analyze it. 5 6 ; CHECK: %i = phi i64 [ 5, %entry ], [ 5, %alt ], [ %i.next, %loop.a ], [ %i.next, %loop.b ] 7 ; CHECK-NEXT: --> {5,+,1}<%loop> 8 9 define void @foo(i1 %p, i1 %q, i1 %s, i1 %u) { 10 entry: 11 br i1 %p, label %loop, label %alt 12 13 alt: 14 br i1 %s, label %loop, label %exit 15 16 loop: 17 %i = phi i64 [ 5, %entry ], [ 5, %alt ], [ %i.next, %loop.a ], [ %i.next, %loop.b ] 18 %i.next = add i64 %i, 1 19 br i1 %q, label %loop.a, label %loop.b 20 21 loop.a: 22 br label %loop 23 24 loop.b: 25 br i1 %u, label %loop, label %exit 26 27 exit: 28 ret void 29 } 30
