| Jakob Stoklund Olesen | a4e6397 | 2012-06-25 18:18:27 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -verify-machineinstrs -verify-coalescing |
| 2 | ; |
| 3 | ; This function has a PHI with one undefined input. Verify that PHIElimination |
| 4 | ; inserts an IMPLICIT_DEF instruction in the predecessor so all paths to the use |
| 5 | ; pass through a def. |
| 6 | |
| 7 | %struct.xx_stack = type { i32, %struct.xx_stack* } |
| 8 | |
| 9 | define i32 @push(%struct.xx_stack* %stack) nounwind uwtable readonly ssp { |
| 10 | entry: |
| 11 | %tobool1 = icmp eq %struct.xx_stack* %stack, null |
| 12 | br i1 %tobool1, label %for.end, label %for.body |
| 13 | |
| 14 | for.body: |
| 15 | %stack.addr.02 = phi %struct.xx_stack* [ %0, %for.body ], [ %stack, %entry ] |
| 16 | %next = getelementptr inbounds %struct.xx_stack* %stack.addr.02, i64 0, i32 1 |
| 17 | %0 = load %struct.xx_stack** %next, align 8 |
| 18 | %tobool = icmp eq %struct.xx_stack* %0, null |
| 19 | br i1 %tobool, label %for.end, label %for.body |
| 20 | |
| 21 | for.end: |
| 22 | %top.0.lcssa = phi %struct.xx_stack* [ undef, %entry ], [ %stack.addr.02, %for.body ] |
| 23 | %first = getelementptr inbounds %struct.xx_stack* %top.0.lcssa, i64 0, i32 0 |
| 24 | %1 = load i32* %first, align 4 |
| 25 | ret i32 %1 |
| 26 | } |