1 ; RUN: llc -march=hexagon -enable-pipeliner=true -stats -o /dev/null < %s \ 2 ; RUN: 2>&1 | FileCheck %s --check-prefix=STATS 3 ; REQUIRES: asserts 4 5 ; Test that we do not schedule chained references too far apart, 6 ; which enables the loop to be pipelined. In this test, the loop should 7 ; not be pipelined when the chained references are constrained correctly. 8 9 ; STATS-NOT: 1 pipeliner - Number of loops software pipelined 10 11 ; Function Attrs: nounwind 12 define void @f0() #0 { 13 b0: 14 br label %b2 15 16 b1: ; preds = %b6 17 br label %b7 18 19 b2: ; preds = %b6, %b0 20 br label %b3 21 22 b3: ; preds = %b5, %b2 23 br i1 undef, label %b4, label %b5 24 25 b4: ; preds = %b3 26 br label %b5 27 28 b5: ; preds = %b4, %b3 29 br i1 undef, label %b3, label %b6 30 31 b6: ; preds = %b5 32 br i1 undef, label %b1, label %b2 33 34 b7: ; preds = %b7, %b1 35 %v0 = phi i32 [ 0, %b1 ], [ %v4, %b7 ] 36 %v1 = load i16, i16* undef, align 8, !tbaa !0 37 %v2 = icmp sgt i16 %v1, undef 38 %v3 = select i1 %v2, i16 4, i16 undef 39 store i16 %v3, i16* undef, align 2, !tbaa !0 40 store i16 -32768, i16* undef, align 2, !tbaa !0 41 %v4 = add i32 %v0, 1 42 %v5 = icmp eq i32 %v4, 5 43 br i1 %v5, label %b8, label %b7 44 45 b8: ; preds = %b7 46 br i1 undef, label %b9, label %b10 47 48 b9: ; preds = %b8 49 br label %b10 50 51 b10: ; preds = %b9, %b8 52 br i1 undef, label %b11, label %b12 53 54 b11: ; preds = %b10 55 unreachable 56 57 b12: ; preds = %b10 58 ret void 59 } 60 61 attributes #0 = { nounwind "target-cpu"="hexagonv55" } 62 63 !0 = !{!1, !1, i64 0} 64 !1 = !{!"short", !2} 65 !2 = !{!"omnipotent char", !3} 66 !3 = !{!"Simple C/C++ TBAA"} 67
