| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| 2 | |
| 3 | ; Checks that the SimplifyCFG pass won't duplicate a call to a function marked |
| 4 | ; convergent. |
| 5 | ; |
| 6 | ; CHECK: call void @barrier |
| 7 | ; CHECK-NOT: call void @barrier |
| 8 | define void @check(i1 %cond, i32* %out) { |
| 9 | entry: |
| 10 | br i1 %cond, label %if.then, label %if.end |
| 11 | |
| 12 | if.then: |
| 13 | store i32 5, i32* %out |
| 14 | br label %if.end |
| 15 | |
| 16 | if.end: |
| 17 | %x = phi i1 [ true, %entry ], [ false, %if.then ] |
| 18 | call void @barrier() |
| 19 | br i1 %x, label %cond.end, label %cond.false |
| 20 | |
| 21 | cond.false: |
| 22 | br label %cond.end |
| 23 | |
| 24 | cond.end: |
| 25 | ret void |
| 26 | } |
| 27 | |
| 28 | declare void @barrier() convergent |