| Evan Cheng | 9c777a4 | 2012-07-27 21:21:26 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s |
| 2 | |
| 3 | ; Teach CGP to dup returns to enable tail call optimization. |
| 4 | ; rdar://9147433 |
| 5 | |
| 6 | define i32 @foo(i32 %x) nounwind ssp { |
| 7 | ; CHECK: foo: |
| 8 | entry: |
| 9 | switch i32 %x, label %return [ |
| 10 | i32 1, label %sw.bb |
| 11 | i32 2, label %sw.bb1 |
| 12 | i32 3, label %sw.bb3 |
| 13 | i32 4, label %sw.bb5 |
| 14 | i32 5, label %sw.bb7 |
| 15 | i32 6, label %sw.bb9 |
| 16 | ] |
| 17 | |
| 18 | sw.bb: ; preds = %entry |
| 19 | ; CHECK: jmp _f1 |
| 20 | %call = tail call i32 @f1() nounwind |
| 21 | br label %return |
| 22 | |
| 23 | sw.bb1: ; preds = %entry |
| 24 | ; CHECK: jmp _f2 |
| 25 | %call2 = tail call i32 @f2() nounwind |
| 26 | br label %return |
| 27 | |
| 28 | sw.bb3: ; preds = %entry |
| 29 | ; CHECK: jmp _f3 |
| 30 | %call4 = tail call i32 @f3() nounwind |
| 31 | br label %return |
| 32 | |
| 33 | sw.bb5: ; preds = %entry |
| 34 | ; CHECK: jmp _f4 |
| 35 | %call6 = tail call i32 @f4() nounwind |
| 36 | br label %return |
| 37 | |
| 38 | sw.bb7: ; preds = %entry |
| 39 | ; CHECK: jmp _f5 |
| 40 | %call8 = tail call i32 @f5() nounwind |
| 41 | br label %return |
| 42 | |
| 43 | sw.bb9: ; preds = %entry |
| 44 | ; CHECK: jmp _f6 |
| 45 | %call10 = tail call i32 @f6() nounwind |
| 46 | br label %return |
| 47 | |
| 48 | return: ; preds = %entry, %sw.bb9, %sw.bb7, %sw.bb5, %sw.bb3, %sw.bb1, %sw.bb |
| 49 | %retval.0 = phi i32 [ %call10, %sw.bb9 ], [ %call8, %sw.bb7 ], [ %call6, %sw.bb5 ], [ %call4, %sw.bb3 ], [ %call2, %sw.bb1 ], [ %call, %sw.bb ], [ 0, %entry ] |
| 50 | ret i32 %retval.0 |
| 51 | } |
| 52 | |
| 53 | declare i32 @f1() |
| 54 | |
| 55 | declare i32 @f2() |
| 56 | |
| 57 | declare i32 @f3() |
| 58 | |
| 59 | declare i32 @f4() |
| 60 | |
| 61 | declare i32 @f5() |
| 62 | |
| 63 | declare i32 @f6() |
| 64 | |
| 65 | ; rdar://11958338 |
| 66 | %0 = type opaque |
| 67 | |
| 68 | declare i8* @bar(i8*) uwtable optsize noinline ssp |
| 69 | |
| 70 | define hidden %0* @thingWithValue(i8* %self) uwtable ssp { |
| 71 | entry: |
| 72 | ; CHECK: thingWithValue: |
| 73 | ; CHECK: jmp _bar |
| 74 | br i1 undef, label %if.then.i, label %if.else.i |
| 75 | |
| 76 | if.then.i: ; preds = %entry |
| 77 | br label %someThingWithValue.exit |
| 78 | |
| 79 | if.else.i: ; preds = %entry |
| 80 | %call4.i = tail call i8* @bar(i8* undef) optsize |
| 81 | br label %someThingWithValue.exit |
| 82 | |
| 83 | someThingWithValue.exit: ; preds = %if.else.i, %if.then.i |
| 84 | %retval.0.in.i = phi i8* [ undef, %if.then.i ], [ %call4.i, %if.else.i ] |
| 85 | %retval.0.i = bitcast i8* %retval.0.in.i to %0* |
| 86 | ret %0* %retval.0.i |
| 87 | } |