| Hans Wennborg | 1096539 | 2014-12-04 22:19:25 +0000 | [diff] [blame] | 1 | ; RUN: opt %s -simplifycfg -S | FileCheck %s |
| 2 | |
| 3 | declare i32 @f(i32) |
| 4 | |
| 5 | define i32 @basic(i32 %x) { |
| 6 | ; CHECK-LABEL: @basic |
| 7 | ; CHECK-LABEL: entry: |
| 8 | ; CHECK-NEXT: call i32 @f(i32 0) |
| 9 | ; CHECK-NEXT: ret i32 %0 |
| 10 | |
| 11 | entry: |
| 12 | switch i32 %x, label %default [ |
| 13 | i32 5, label %default |
| 14 | i32 6, label %default |
| 15 | i32 7, label %default |
| 16 | ] |
| 17 | default: |
| 18 | %0 = call i32 @f(i32 0) |
| 19 | ret i32 %0 |
| 20 | } |
| 21 | |
| 22 | |
| 23 | define i32 @constant() { |
| 24 | ; CHECK-LABEL: @constant |
| 25 | ; CHECK-LABEL: entry: |
| 26 | ; CHECK-NEXT: call i32 @f(i32 1) |
| 27 | ; CHECK-NEXT: ret i32 %0 |
| 28 | |
| 29 | entry: |
| 30 | switch i32 42, label %default [ |
| 31 | i32 41, label %default |
| 32 | i32 42, label %a |
| 33 | i32 43, label %b |
| 34 | ] |
| 35 | default: |
| 36 | %0 = call i32 @f(i32 0) |
| 37 | ret i32 %0 |
| 38 | a: |
| 39 | %1 = call i32 @f(i32 1) |
| 40 | ret i32 %1 |
| 41 | b: |
| 42 | %2 = call i32 @f(i32 2) |
| 43 | ret i32 %2 |
| 44 | } |
| 45 | |
| 46 | |
| 47 | define i32 @unreachable(i32 %x) { |
| 48 | ; CHECK-LABEL: @unreachable |
| 49 | ; CHECK-LABEL: entry: |
| 50 | ; CHECK-NEXT: call i32 @f(i32 0) |
| 51 | ; CHECK-NEXT: ret i32 %0 |
| 52 | |
| 53 | entry: |
| 54 | switch i32 %x, label %unreachable [ |
| 55 | i32 5, label %a |
| 56 | i32 6, label %a |
| 57 | i32 7, label %a |
| 58 | ] |
| 59 | unreachable: |
| 60 | unreachable |
| 61 | a: |
| 62 | %0 = call i32 @f(i32 0) |
| 63 | ret i32 %0 |
| 64 | } |