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| ; RUN: llc -march=hexagon -hexagon-initial-cfg-cleanup=0 < %s | FileCheck %s
; After register allocation it is possible to have a spill of a register
; that is only partially defined. That in itself it fine, but creates a
; problem for double vector registers. Stores of such registers are pseudo
; instructions that are expanded into pairs of individual vector stores,
; and in case of a partially defined source, one of the stores may use
; an entirely undefined register.
;
; This testcase used to crash. Make sure we can handle it, and that we
; do generate a store for the defined part of W0:
; CHECK-LABEL: fred:
; CHECK: v[[REG:[0-9]+]] = vsplat
; CHECK: vmem(r29+#{{[0-9]+}}) = v[[REG]]
target triple = "hexagon"
declare void @danny() local_unnamed_addr #0
declare void @sammy() local_unnamed_addr #0
declare <32 x i32> @llvm.hexagon.V6.lo.128B(<64 x i32>) #1
declare <32 x i32> @llvm.hexagon.V6.lvsplatw.128B(i32) #1
declare <64 x i32> @llvm.hexagon.V6.vcombine.128B(<32 x i32>, <32 x i32>) #1
declare <32 x i32> @llvm.hexagon.V6.vshuffeb.128B(<32 x i32>, <32 x i32>) #1
declare <32 x i32> @llvm.hexagon.V6.vlsrh.128B(<32 x i32>, i32) #1
declare <64 x i32> @llvm.hexagon.V6.vaddh.dv.128B(<64 x i32>, <64 x i32>) #1
define hidden void @fred() #2 {
b0:
%v1 = load i32, i32* null, align 4
%v2 = icmp ult i64 0, 2147483648
br i1 %v2, label %b3, label %b5
b3: ; preds = %b0
%v4 = icmp sgt i32 0, -1
br i1 %v4, label %b6, label %b5
b5: ; preds = %b3, %b0
ret void
b6: ; preds = %b3
tail call void @danny()
br label %b7
b7: ; preds = %b21, %b6
%v8 = icmp sgt i32 %v1, 0
%v9 = select i1 %v8, i32 %v1, i32 0
%v10 = select i1 false, i32 0, i32 %v9
%v11 = icmp slt i32 %v10, 0
%v12 = select i1 %v11, i32 %v10, i32 0
%v13 = icmp slt i32 0, %v12
br i1 %v13, label %b14, label %b18
b14: ; preds = %b16, %b7
br i1 false, label %b15, label %b16
b15: ; preds = %b14
br label %b16
b16: ; preds = %b15, %b14
%v17 = icmp eq i32 0, %v12
br i1 %v17, label %b18, label %b14
b18: ; preds = %b16, %b7
tail call void @danny()
%v19 = tail call <32 x i32> @llvm.hexagon.V6.lvsplatw.128B(i32 524296) #0
%v20 = tail call <64 x i32> @llvm.hexagon.V6.vcombine.128B(<32 x i32> %v19, <32 x i32> %v19)
br label %b22
b21: ; preds = %b22
tail call void @sammy() #3
br label %b7
b22: ; preds = %b22, %b18
%v23 = tail call <64 x i32> @llvm.hexagon.V6.vaddh.dv.128B(<64 x i32> zeroinitializer, <64 x i32> %v20) #0
%v24 = tail call <32 x i32> @llvm.hexagon.V6.lo.128B(<64 x i32> %v23)
%v25 = tail call <32 x i32> @llvm.hexagon.V6.vlsrh.128B(<32 x i32> %v24, i32 4) #0
%v26 = tail call <64 x i32> @llvm.hexagon.V6.vcombine.128B(<32 x i32> zeroinitializer, <32 x i32> %v25)
%v27 = tail call <32 x i32> @llvm.hexagon.V6.vshuffeb.128B(<32 x i32> zeroinitializer, <32 x i32> zeroinitializer) #0
%v28 = tail call <32 x i32> @llvm.hexagon.V6.lo.128B(<64 x i32> %v26) #0
%v29 = tail call <32 x i32> @llvm.hexagon.V6.vshuffeb.128B(<32 x i32> zeroinitializer, <32 x i32> %v28) #0
store <32 x i32> %v27, <32 x i32>* null, align 128
%v30 = add nsw i32 0, 128
%v31 = getelementptr inbounds i8, i8* null, i32 %v30
%v32 = bitcast i8* %v31 to <32 x i32>*
store <32 x i32> %v29, <32 x i32>* %v32, align 128
%v33 = icmp eq i32 0, 0
br i1 %v33, label %b21, label %b22
}
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind "reciprocal-estimates"="none" "target-cpu"="hexagonv60" "target-features"="+hvxv60,+hvx-length128b" }
attributes #3 = { nobuiltin nounwind }
|