| Dale Johannesen | 85b0ede | 2009-02-11 19:19:41 +0000 | [diff] [blame^] | 1 | ; RUN: llvm-as < %s | llc -march=x86 | not grep btl |
| 2 | |
| 3 | ; This tests some cases where BT must not be generated. See also bt.ll. |
| 4 | ; Fixes 20040709-[12].c in gcc testsuite. |
| 5 | |
| 6 | define void @test2(i32 %x, i32 %n) nounwind { |
| 7 | entry: |
| 8 | %tmp1 = and i32 %x, 1 |
| 9 | %tmp2 = urem i32 %tmp1, 15 |
| 10 | %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| 11 | %tmp4 = icmp eq i32 %tmp3, %tmp2 ; <i1> [#uses=1] |
| 12 | br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| 13 | |
| 14 | bb: ; preds = %entry |
| 15 | call void @foo() |
| 16 | ret void |
| 17 | |
| 18 | UnifiedReturnBlock: ; preds = %entry |
| 19 | ret void |
| 20 | } |
| 21 | |
| 22 | define void @test3(i32 %x, i32 %n) nounwind { |
| 23 | entry: |
| 24 | %tmp1 = and i32 %x, 1 |
| 25 | %tmp2 = urem i32 %tmp1, 15 |
| 26 | %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| 27 | %tmp4 = icmp eq i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| 28 | br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| 29 | |
| 30 | bb: ; preds = %entry |
| 31 | call void @foo() |
| 32 | ret void |
| 33 | |
| 34 | UnifiedReturnBlock: ; preds = %entry |
| 35 | ret void |
| 36 | } |
| 37 | |
| 38 | define void @test4(i32 %x, i32 %n) nounwind { |
| 39 | entry: |
| 40 | %tmp1 = and i32 %x, 1 |
| 41 | %tmp2 = urem i32 %tmp1, 15 |
| 42 | %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| 43 | %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| 44 | br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| 45 | |
| 46 | bb: ; preds = %entry |
| 47 | call void @foo() |
| 48 | ret void |
| 49 | |
| 50 | UnifiedReturnBlock: ; preds = %entry |
| 51 | ret void |
| 52 | } |
| 53 | |
| 54 | define void @test5(i32 %x, i32 %n) nounwind { |
| 55 | entry: |
| 56 | %tmp1 = and i32 %x, 1 |
| 57 | %tmp2 = urem i32 %tmp1, 15 |
| 58 | %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] |
| 59 | %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] |
| 60 | br i1 %tmp4, label %bb, label %UnifiedReturnBlock |
| 61 | |
| 62 | bb: ; preds = %entry |
| 63 | call void @foo() |
| 64 | ret void |
| 65 | |
| 66 | UnifiedReturnBlock: ; preds = %entry |
| 67 | ret void |
| 68 | } |
| 69 | |
| 70 | declare void @foo() |