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| ; RUN: llc -march=hexagon < %s | FileCheck %s
; Make sure that the loop in the end has only one basic block.
; CHECK-LABEL: fred
; CHECK: %b2
; Rely on the comments, make sure the one for the loop header is present.
; CHECK: %loop
; CHECK: %should_merge
; CHECK: %exit
target triple = "hexagon"
define i32 @fred(i32 %a0, i64* nocapture readonly %a1) #0 {
b2:
%v3 = bitcast i64* %a1 to i32*
%v4 = getelementptr inbounds i32, i32* %v3, i32 1
%v5 = zext i32 %a0 to i64
br label %loop
loop: ; preds = %should_merge, %b2
%v7 = phi i32 [ 0, %b2 ], [ %v49, %should_merge ]
%v8 = phi i32 [ 0, %b2 ], [ %v42, %should_merge ]
%v9 = phi i32* [ %v4, %b2 ], [ %v53, %should_merge ]
%v10 = phi i32 [ 0, %b2 ], [ %v30, %should_merge ]
%v11 = phi i32* [ %v3, %b2 ], [ %v51, %should_merge ]
%v12 = phi i32 [ 0, %b2 ], [ %v23, %should_merge ]
%v13 = phi i32 [ 2, %b2 ], [ %v54, %should_merge ]
%v14 = load i32, i32* %v11, align 4, !tbaa !0
%v15 = load i32, i32* %v9, align 4, !tbaa !0
%v16 = icmp ult i32 %v13, 30
%v17 = zext i32 %v12 to i64
%v18 = shl nuw i64 %v17, 32
%v19 = zext i32 %v14 to i64
%v20 = or i64 %v18, %v19
%v21 = tail call i64 @llvm.hexagon.A2.addp(i64 %v20, i64 %v5)
%v22 = lshr i64 %v21, 32
%v23 = trunc i64 %v22 to i32
%v24 = zext i32 %v10 to i64
%v25 = shl nuw i64 %v24, 32
%v26 = zext i32 %v15 to i64
%v27 = or i64 %v25, %v26
%v28 = tail call i64 @llvm.hexagon.A2.addp(i64 %v27, i64 %v5)
%v29 = lshr i64 %v28, 32
%v30 = trunc i64 %v29 to i32
%v31 = getelementptr inbounds i32, i32* %v3, i32 %v13
%v32 = load i32, i32* %v31, align 4, !tbaa !0
%v33 = or i32 %v13, 1
%v34 = getelementptr inbounds i32, i32* %v3, i32 %v33
%v35 = load i32, i32* %v34, align 4, !tbaa !0
%v36 = zext i32 %v8 to i64
%v37 = shl nuw i64 %v36, 32
%v38 = zext i32 %v32 to i64
%v39 = or i64 %v37, %v38
%v40 = tail call i64 @llvm.hexagon.A2.subp(i64 %v39, i64 %v5)
%v41 = lshr i64 %v40, 32
%v42 = trunc i64 %v41 to i32
%v43 = zext i32 %v7 to i64
%v44 = shl nuw i64 %v43, 32
%v45 = zext i32 %v35 to i64
%v46 = or i64 %v44, %v45
%v47 = tail call i64 @llvm.hexagon.A2.subp(i64 %v46, i64 %v5)
%v48 = lshr i64 %v47, 32
%v49 = trunc i64 %v48 to i32
br i1 %v16, label %should_merge, label %exit
should_merge: ; preds = %loop
%v50 = add nuw nsw i32 %v13, 2
%v51 = getelementptr inbounds i32, i32* %v3, i32 %v50
%v52 = add nuw nsw i32 %v13, 3
%v53 = getelementptr inbounds i32, i32* %v3, i32 %v52
%v54 = add nuw nsw i32 %v13, 4
br label %loop
exit: ; preds = %loop
%v57 = tail call i64 @llvm.hexagon.A2.combinew(i32 %v42, i32 %v23)
%v58 = tail call i64 @llvm.hexagon.A2.combinew(i32 %v49, i32 %v30)
%v59 = tail call i64 @llvm.hexagon.A2.addp(i64 %v57, i64 %v58)
%v60 = lshr i64 %v59, 32
%v61 = trunc i64 %v60 to i32
ret i32 %v61
}
declare i64 @llvm.hexagon.A2.addp(i64, i64) #1
declare i64 @llvm.hexagon.A2.subp(i64, i64) #1
declare i64 @llvm.hexagon.A2.combinew(i32, i32) #1
attributes #0 = { nounwind readonly "target-cpu"="hexagonv60" "target-features"="-hvx,-long-calls" }
attributes #1 = { nounwind readnone }
!0 = !{!1, !1, i64 0}
!1 = !{!"long", !2, i64 0}
!2 = !{!"omnipotent char", !3, i64 0}
!3 = !{!"Simple C/C++ TBAA"}
|