| Benjamin Kramer | 042b27f | 2011-02-03 22:51:41 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -simplifycfg < %s | FileCheck %s |
| 2 | |
| 3 | define zeroext i1 @test1(i32 %x) nounwind readnone ssp noredzone { |
| 4 | entry: |
| 5 | switch i32 %x, label %lor.rhs [ |
| 6 | i32 2, label %lor.end |
| 7 | i32 1, label %lor.end |
| 8 | i32 3, label %lor.end |
| 9 | ] |
| 10 | |
| 11 | lor.rhs: |
| 12 | br label %lor.end |
| 13 | |
| 14 | lor.end: |
| 15 | %0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ], [ true, %entry ] |
| 16 | ret i1 %0 |
| 17 | |
| 18 | ; CHECK: @test1 |
| Benjamin Kramer | 33828bc | 2011-02-07 22:37:28 +0000 | [diff] [blame] | 19 | ; CHECK: %x.off = add i32 %x, -1 |
| 20 | ; CHECK: %switch = icmp ult i32 %x.off, 3 |
| Benjamin Kramer | 042b27f | 2011-02-03 22:51:41 +0000 | [diff] [blame] | 21 | } |
| 22 | |
| 23 | define zeroext i1 @test2(i32 %x) nounwind readnone ssp noredzone { |
| 24 | entry: |
| 25 | switch i32 %x, label %lor.rhs [ |
| 26 | i32 0, label %lor.end |
| 27 | i32 1, label %lor.end |
| 28 | ] |
| 29 | |
| 30 | lor.rhs: |
| 31 | br label %lor.end |
| 32 | |
| 33 | lor.end: |
| 34 | %0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ] |
| 35 | ret i1 %0 |
| 36 | |
| 37 | ; CHECK: @test2 |
| Benjamin Kramer | 33828bc | 2011-02-07 22:37:28 +0000 | [diff] [blame] | 38 | ; CHECK: %switch = icmp ult i32 %x, 2 |
| Benjamin Kramer | 042b27f | 2011-02-03 22:51:41 +0000 | [diff] [blame] | 39 | } |
| Hans Wennborg | a121e24 | 2013-04-16 08:35:36 +0000 | [diff] [blame^] | 40 | |
| 41 | define i32 @test3(i1 %flag) { |
| 42 | entry: |
| 43 | switch i1 %flag, label %bad [ |
| 44 | i1 true, label %good |
| 45 | i1 false, label %good |
| 46 | ] |
| 47 | |
| 48 | good: |
| 49 | ret i32 0 |
| 50 | |
| 51 | bad: |
| 52 | ret i32 1 |
| 53 | |
| 54 | ; CHECK: @test3 |
| 55 | ; CHECK: entry: |
| 56 | ; CHECK-NEXT: ret i32 0 |
| 57 | } |