1; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s 2; RUN: llc < %s -mtriple=x86_64-linux -sink-insts-to-avoid-spills | FileCheck %s -check-prefix=SINK 3 4; Ensure that we sink copy-like instructions into loops to avoid register 5; spills. 6 7; CHECK: Spill 8; SINK-NOT: Spill 9 10%struct.A = type { i32, i32, i32, i32, i32, i32 } 11 12define void @_Z1fPhP1A(i8* nocapture readonly %input, %struct.A* %a) { 13 %1 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 0 14 %2 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 1 15 %3 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 2 16 %4 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 3 17 %5 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 4 18 %6 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 5 19 br label %.backedge 20 21.backedge: 22 %.0 = phi i8* [ %input, %0 ], [ %7, %.backedge.backedge ] 23 %7 = getelementptr inbounds i8, i8* %.0, i64 1 24 %8 = load i8, i8* %7, align 1 25 switch i8 %8, label %.backedge.backedge [ 26 i8 0, label %9 27 i8 10, label %10 28 i8 20, label %11 29 i8 30, label %12 30 i8 40, label %13 31 i8 50, label %14 32 ] 33 34; <label>:9 35 tail call void @_Z6assignPj(i32* %1) 36 br label %.backedge.backedge 37 38; <label>:10 39 tail call void @_Z6assignPj(i32* %2) 40 br label %.backedge.backedge 41 42.backedge.backedge: 43 br label %.backedge 44 45; <label>:11 46 tail call void @_Z6assignPj(i32* %3) 47 br label %.backedge.backedge 48 49; <label>:12 50 tail call void @_Z6assignPj(i32* %4) 51 br label %.backedge.backedge 52 53; <label>:13 54 tail call void @_Z6assignPj(i32* %5) 55 br label %.backedge.backedge 56 57; <label>:14 58 tail call void @_Z6assignPj(i32* %6) 59 br label %.backedge.backedge 60} 61 62declare void @_Z6assignPj(i32*) 63