| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -loop-unroll -S | FileCheck %s |
| 2 | ; RUN: opt < %s -passes='require<opt-remark-emit>,unroll' -S | FileCheck %s |
| 3 | |
| 4 | |
| 5 | ; This should not unroll since the address of the loop header is taken. |
| 6 | |
| 7 | ; CHECK-LABEL: @test1( |
| 8 | ; CHECK: store i8* blockaddress(@test1, %l1), i8** %P |
| 9 | ; CHECK: l1: |
| 10 | ; CHECK-NEXT: phi i32 |
| 11 | ; rdar://8287027 |
| 12 | define i32 @test1(i8** %P) nounwind ssp { |
| 13 | entry: |
| 14 | store i8* blockaddress(@test1, %l1), i8** %P |
| 15 | br label %l1 |
| 16 | |
| 17 | l1: ; preds = %l1, %entry |
| 18 | %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ] |
| 19 | %inc = add nsw i32 %x.0, 1 |
| 20 | %exitcond = icmp eq i32 %inc, 3 |
| 21 | br i1 %exitcond, label %l2, label %l1 |
| 22 | |
| 23 | l2: ; preds = %l1 |
| 24 | ret i32 0 |
| 25 | } |
| 26 | |
| 27 | ; This should not unroll since the call is 'noduplicate'. |
| 28 | |
| 29 | ; CHECK-LABEL: @test2( |
| 30 | define i32 @test2(i8** %P) nounwind ssp { |
| 31 | entry: |
| 32 | br label %l1 |
| 33 | |
| 34 | l1: ; preds = %l1, %entry |
| 35 | %x.0 = phi i32 [ 0, %entry ], [ %inc, %l1 ] |
| 36 | ; CHECK: call void @f() |
| 37 | ; CHECK-NOT: call void @f() |
| 38 | call void @f() noduplicate |
| 39 | %inc = add nsw i32 %x.0, 1 |
| 40 | %exitcond = icmp eq i32 %inc, 3 |
| 41 | br i1 %exitcond, label %l2, label %l1 |
| 42 | |
| 43 | l2: ; preds = %l1 |
| 44 | ret i32 0 |
| 45 | ; CHECK: } |
| 46 | } |
| 47 | |
| 48 | declare void @f() |