| ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s |
| |
| declare i1 @use(i64) |
| |
| define void @f_0() { |
| ; CHECK-LABEL: Classifying expressions for: @f_0 |
| |
| ; CHECK: %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ] |
| ; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> |
| ; CHECK: %iv.inc.maywrap = add i32 %iv, 1 |
| ; CHECK-NEXT: --> {1,+,1}<nuw><%loop> |
| ; CHECK: %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64 |
| ; CHECK-NEXT: --> (sext i32 {1,+,1}<nuw><%loop> to i64) |
| entry: |
| br label %loop |
| |
| loop: |
| %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ] |
| %iv.inc.maywrap = add i32 %iv, 1 |
| %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64 |
| %cond0 = call i1 @use(i64 %iv.inc.maywrap.sext) |
| br i1 %cond0, label %be, label %leave |
| |
| be: |
| %iv.inc.nowrap = add nsw i32 %iv, 1 |
| %be.cond = call i1 @use(i64 0) ;; Get an unanalyzable value |
| br i1 %be.cond, label %loop, label %leave |
| |
| leave: |
| ret void |
| } |