| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -simplifycfg -switch-to-lookup -S %s | FileCheck %s |
| 2 | ; RUN: opt -passes='simplify-cfg<switch-to-lookup>' -S %s | FileCheck %s |
| 3 | ; rdar://15268442 |
| 4 | |
| 5 | target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" |
| 6 | target triple = "x86_64-apple-darwin12.0.0" |
| 7 | |
| 8 | ; CHECK-LABEL: define i3 @coveredswitch_test( |
| 9 | ; CHECK: entry: |
| 10 | ; CHECK-NEXT: sub i3 %input, -4 |
| 11 | ; CHECK-NEXT: zext i3 %switch.tableidx to i24 |
| 12 | ; CHECK-NEXT: mul i24 %switch.cast, 3 |
| 13 | ; CHECK-NEXT: lshr i24 7507338, %switch.shiftamt |
| 14 | ; CHECK-NEXT: trunc i24 %switch.downshift to i3 |
| 15 | ; CHECK-NEXT: ret i3 %switch.masked |
| 16 | |
| 17 | define i3 @coveredswitch_test(i3 %input) { |
| 18 | entry: |
| 19 | switch i3 %input, label %bb8 [ |
| 20 | i3 0, label %bb7 |
| 21 | i3 1, label %bb |
| 22 | i3 2, label %bb3 |
| 23 | i3 3, label %bb4 |
| 24 | i3 4, label %bb5 |
| 25 | i3 5, label %bb6 |
| 26 | ] |
| 27 | |
| 28 | bb: ; preds = %entry |
| 29 | br label %bb8 |
| 30 | |
| 31 | bb3: ; preds = %entry |
| 32 | br label %bb8 |
| 33 | |
| 34 | bb4: ; preds = %entry |
| 35 | br label %bb8 |
| 36 | |
| 37 | bb5: ; preds = %entry |
| 38 | br label %bb8 |
| 39 | |
| 40 | bb6: ; preds = %entry |
| 41 | br label %bb8 |
| 42 | |
| 43 | bb7: ; preds = %entry |
| 44 | br label %bb8 |
| 45 | |
| 46 | bb8: ; preds = %bb7, %bb6, %bb5, %bb4, %bb3, %bb, %entry |
| 47 | %result = phi i3 [ 0, %bb7 ], [ 1, %bb6 ], [ 2, %bb5 ], [ 3, %bb4 ], [ 4, %bb3 ], [ 5, %bb ], [ 6, %entry ] |
| 48 | ret i3 %result |
| 49 | } |