| ; RUN: llc < %s -verify-machineinstrs -verify-coalescing |
| ; |
| ; This function has a PHI with one undefined input. Verify that PHIElimination |
| ; inserts an IMPLICIT_DEF instruction in the predecessor so all paths to the use |
| ; pass through a def. |
| |
| %struct.xx_stack = type { i32, ptr } |
| |
| define i32 @push(ptr %stack) nounwind uwtable readonly ssp { |
| entry: |
| %tobool1 = icmp eq ptr %stack, null |
| br i1 %tobool1, label %for.end, label %for.body |
| |
| for.body: |
| %stack.addr.02 = phi ptr [ %0, %for.body ], [ %stack, %entry ] |
| %next = getelementptr inbounds %struct.xx_stack, ptr %stack.addr.02, i64 0, i32 1 |
| %0 = load ptr, ptr %next, align 8 |
| %tobool = icmp eq ptr %0, null |
| br i1 %tobool, label %for.end, label %for.body |
| |
| for.end: |
| %top.0.lcssa = phi ptr [ undef, %entry ], [ %stack.addr.02, %for.body ] |
| %1 = load i32, ptr %top.0.lcssa, align 4 |
| ret i32 %1 |
| } |
