; RUN: llc -march=hexagon < %s
; REQUIRES: asserts
; After a copy R20 = R29, RDF copy propagation attempted to replace R20 with
; R29. R29 did not have a reaching def at that point (which isn't unusual),
; but copy propagation tried to link the new use of R29 to the presumed
; reaching def (which was null), causing a crash.
target triple = "hexagon"
@g0 = external unnamed_addr global i1, align 4
; Function Attrs: nounwind
declare ptr @llvm.stacksave() #0
; Function Attrs: nounwind
declare void @llvm.stackrestore(ptr) #0
; Function Attrs: norecurse nounwind
declare fastcc void @f0(i16 signext, i16 signext, i16 signext, ptr nocapture readonly, i16 signext, ptr nocapture) unnamed_addr #1
; Function Attrs: norecurse nounwind
declare fastcc signext i16 @f1(i16 signext, i16 signext) unnamed_addr #1
; Function Attrs: norecurse nounwind
define fastcc i32 @f2(ptr nocapture readonly %a0, i16 signext %a1, i16 signext %a2, ptr nocapture readonly %a3, i16 signext %a4, ptr nocapture readonly %a51, ptr nocapture %a6) unnamed_addr #1 {
b0:
%v0 = tail call ptr @llvm.stacksave()
%v1 = tail call fastcc signext i16 @f1(i16 signext %a2, i16 signext %a1)
br i1 undef, label %b7, label %b1
b1: ; preds = %b0
br i1 undef, label %b3, label %b2
b2: ; preds = %b1
br i1 undef, label %b4, label %b8
b3: ; preds = %b1
br i1 undef, label %b5, label %b8
b4: ; preds = %b4, %b2
br i1 undef, label %b4, label %b6, !llvm.loop !2
b5: ; preds = %b5, %b3
%v2 = phi i16 [ %v3, %b5 ], [ 0, %b3 ]
%v3 = add i16 %v2, 1
%v4 = icmp sgt i32 0, -1073741825
br i1 %v4, label %b5, label %b6
b6: ; preds = %b5, %b4
%v5 = phi i16 [ %v3, %b5 ], [ undef, %b4 ]
br label %b7
b7: ; preds = %b6, %b0
%v6 = phi i16 [ %v5, %b6 ], [ 0, %b0 ]
br i1 undef, label %b9, label %b8
b8: ; preds = %b7, %b3, %b2
%v7 = or i32 0, undef
br label %b9
b9: ; preds = %b8, %b7
%v8 = phi i16 [ 0, %b8 ], [ %v6, %b7 ]
%v9 = phi i32 [ %v7, %b8 ], [ 0, %b7 ]
%v10 = load i16, ptr undef, align 2, !tbaa !4
%v11 = sext i16 %v10 to i32
%v12 = zext i16 %v10 to i32
br i1 undef, label %b10, label %b11
b10: ; preds = %b9
store i1 true, ptr @g0, align 4
br label %b11
b11: ; preds = %b10, %b9
%v13 = load i16, ptr undef, align 2, !tbaa !4
%v14 = sext i16 %v13 to i32
%v15 = shl nuw i32 %v12, 16
%v16 = and i32 %v9, 65535
%v17 = mul nsw i32 %v11, %v16
%v18 = sitofp i32 %v15 to double
%v19 = fsub double %v18, undef
%v20 = sub nsw i32 %v15, %v17
%v21 = fptosi double %v19 to i32
%v22 = select i1 undef, i32 %v21, i32 %v20
%v23 = mul nsw i32 %v14, %v16
%v24 = add nsw i32 %v23, %v22
%v25 = add nsw i32 %v24, 32768
%v26 = lshr i32 %v25, 16
%v27 = xor i1 undef, true
%v28 = and i1 %v27, undef
br i1 %v28, label %b12, label %b13
b12: ; preds = %b11
store i1 true, ptr @g0, align 4
br label %b13
b13: ; preds = %b12, %b11
br i1 undef, label %b14, label %b24
b14: ; preds = %b13
br label %b15
b15: ; preds = %b23, %b14
br i1 undef, label %b16, label %b17
b16: ; preds = %b15
br label %b19
b17: ; preds = %b15
%v29 = trunc i32 %v26 to i16
%v30 = icmp eq i16 %v29, -32768
%v31 = and i1 undef, %v30
br i1 %v31, label %b18, label %b19
b18: ; preds = %b17
store i1 true, ptr @g0, align 4
br label %b20
b19: ; preds = %b17, %b16
br label %b20
b20: ; preds = %b19, %b18
%v32 = phi i32 [ 2147483647, %b18 ], [ 0, %b19 ]
%v33 = icmp eq i16 %v8, 32767
br i1 %v33, label %b21, label %b22
b21: ; preds = %b20
store i1 true, ptr @g0, align 4
br label %b23
b22: ; preds = %b20
br label %b23
b23: ; preds = %b22, %b21
%v34 = add nsw i32 %v32, 32768
%v35 = lshr i32 %v34, 16
%v36 = trunc i32 %v35 to i16
store i16 %v36, ptr undef, align 2, !tbaa !4
br i1 undef, label %b24, label %b15
b24: ; preds = %b23, %b13
call fastcc void @f0(i16 signext undef, i16 signext %a1, i16 signext %a2, ptr %a3, i16 signext %a4, ptr %a6)
call void @llvm.stackrestore(ptr %v0)
ret i32 undef
}
attributes #0 = { nounwind }
attributes #1 = { norecurse nounwind "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length64b" }
!llvm.module.flags = !{!0}
!0 = !{i32 6, !"Target Features", !1}
!1 = !{!"+hvx,+hvx-length64b"}
!2 = distinct !{!2, !3}
!3 = !{!"llvm.loop.threadify", i32 43789156}
!4 = !{!5, !5, i64 0}
!5 = !{!"short", !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
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