1 ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s 2 3 declare i1 @use(i64) 4 5 define void @f_0() { 6 ; CHECK-LABEL: Classifying expressions for: @f_0 7 8 ; CHECK: %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ] 9 ; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> 10 ; CHECK: %iv.inc.maywrap = add i32 %iv, 1 11 ; CHECK-NEXT: --> {1,+,1}<nuw><%loop> 12 ; CHECK: %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64 13 ; CHECK-NEXT: --> (sext i32 {1,+,1}<nuw><%loop> to i64) 14 entry: 15 br label %loop 16 17 loop: 18 %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ] 19 %iv.inc.maywrap = add i32 %iv, 1 20 %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64 21 %cond0 = call i1 @use(i64 %iv.inc.maywrap.sext) 22 br i1 %cond0, label %be, label %leave 23 24 be: 25 %iv.inc.nowrap = add nsw i32 %iv, 1 26 %be.cond = call i1 @use(i64 0) ;; Get an unanalyzable value 27 br i1 %be.cond, label %loop, label %leave 28 29 leave: 30 ret void 31 } 32
