| ; RUN: opt -S -jump-threading < %s | FileCheck %s |
| |
| ; CHECK-LABEL: @f( |
| ; CHECK-LABEL: entry |
| ; CHECK-NEXT: ret void |
| ; |
| ; JumpThreading must detect the next two blocks are unreachable from entry |
| ; and leave them alone. A subsequent pass will remove them from @f. |
| ; |
| ; CHECK: for.cond1: |
| ; CHECK-NEXT: phi |
| ; CHECK-NEXT: icmp |
| ; CHECK-NEXT: br i1 %cmp, label %for.body, label %for.cond1 |
| ; CHECK: for.body: |
| ; CHECK-NEXT: add |
| ; CHECK-NEXT: icmp |
| ; CHECK-NEXT: br i1 %a, label %for.cond1, label %for.cond1 |
| |
| define void @f() { |
| entry: |
| ret void |
| |
| for.cond1: |
| %i.025 = phi i32 [ %inc, %for.body ], [ %inc, %for.body ], [ 1, %for.cond1 ] |
| %cmp = icmp slt i32 %i.025, 2 |
| br i1 %cmp, label %for.body, label %for.cond1 |
| |
| for.body: |
| %inc = add nsw i32 %i.025, 0 |
| %a = icmp ugt i32 %inc, 2 |
| br i1 %a, label %for.cond1, label %for.cond1 |
| } |
