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| ; RUN: llc -march=hexagon -hexagon-initial-cfg-cleanup=0 < %s -pipeliner-experimental-cg=true | FileCheck %s
; Test that the pipeliner schedules a store before the load in which there is a
; loop carried dependence. Previously, the loop carried dependence wasn't added
; and the load from iteration n was scheduled prior to the store from iteration
; n-1.
; CHECK: loop0(.LBB0_[[LOOP:.]],
; CHECK: .LBB0_[[LOOP]]:
; CHECK: memh({{.*}}) =
; CHECK: = memuh({{.*}})
; CHECK: endloop0
%s.0 = type { i16, i16 }
; Function Attrs: nounwind
define void @f0() local_unnamed_addr #0 {
b0:
br label %b1
b1: ; preds = %b1, %b0
%v0 = phi i32 [ 0, %b0 ], [ %v22, %b1 ]
%v1 = load %s.0*, %s.0** undef, align 4
%v2 = getelementptr inbounds %s.0, %s.0* %v1, i32 0, i32 0
%v3 = load i16, i16* %v2, align 2
%v4 = add i16 0, %v3
%v5 = add i16 %v4, 0
%v6 = add i16 %v5, 0
%v7 = add i16 %v6, 0
%v8 = add i16 %v7, 0
%v9 = add i16 %v8, 0
%v10 = add i16 %v9, 0
%v11 = add i16 %v10, 0
%v12 = add i16 %v11, 0
%v13 = add i16 %v12, 0
%v14 = add i16 %v13, 0
%v15 = add i16 %v14, 0
%v16 = add i16 %v15, 0
%v17 = add i16 %v16, 0
%v18 = add i16 %v17, 0
%v19 = add i16 %v18, 0
%v20 = load %s.0*, %s.0** undef, align 4
store i16 %v19, i16* undef, align 2
%v21 = getelementptr inbounds %s.0, %s.0* %v20, i32 0, i32 1
store i16 0, i16* %v21, align 2
%v22 = add nuw nsw i32 %v0, 1
%v23 = icmp eq i32 %v22, 6
br i1 %v23, label %b2, label %b1
b2: ; preds = %b1
ret void
}
attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvx-length64b,+hvxv60" }
|