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, %struct.xx_stack* %stack.addr.02, i64 0, i32 1 17 %0 = load %struct.xx_stack*, %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, %struct.xx_stack* %top.0.lcssa, i64 0, i32 0 24 %1 = load i32, i32* %first, align 4 25 ret i32 %1 26 } 27
