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; RUN: llc -verify-machineinstrs -mcpu=pwr8 -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
; This code causes an assertion failure if dereferenceable flag is not properly set in the load generated for memcpy
; CHECK-LABEL: @func
; CHECK: lxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK-NOT: lxvd2x
; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK: blr
define void @func(i1 %flag) {
entry:
%pairs = alloca [4 x <2 x i64>], align 8
%pair1 = getelementptr inbounds [4 x <2 x i64>], ptr %pairs, i64 0, i64 1
%pair2 = getelementptr inbounds [4 x <2 x i64>], ptr %pairs, i64 0, i64 2
br i1 %flag, label %end, label %dummy
end:
; copy third element into first element by memcpy
call void @llvm.memcpy.p0.p0.i64(ptr align 8 nonnull %pairs, ptr align 8 %pair2, i64 16, i1 false)
; copy third element into second element by LD/ST
%vec2 = load <2 x i64>, ptr %pair2, align 8
store <2 x i64> %vec2, ptr %pair1, align 8
ret void
dummy:
; to make use of %pair2 in another BB
call void @llvm.memcpy.p0.p0.i64(ptr %pair2, ptr %pair2, i64 0, i1 false)
br label %end
}
; CHECK-LABEL: @func2
; CHECK: lxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK-NOT: lxvd2x
; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK: stxvd2x [[VREG:[0-9]+]], {{[0-9]+}}, {{[0-9]+}}
; CHECK: blr
define void @func2(i1 %flag) {
entry:
%pairs = alloca [4 x <2 x i64>], align 8
%pair1 = getelementptr inbounds [4 x <2 x i64>], ptr %pairs, i64 0, i64 1
%pair2 = getelementptr inbounds [4 x <2 x i64>], ptr %pairs, i64 0, i64 2
br i1 %flag, label %end, label %dummy
end:
; copy third element into first element by memcpy
call void @llvm.memmove.p0.p0.i64(ptr align 8 nonnull %pairs, ptr align 8 %pair2, i64 16, i1 false)
; copy third element into second element by LD/ST
%vec2 = load <2 x i64>, ptr %pair2, align 8
store <2 x i64> %vec2, ptr %pair1, align 8
ret void
dummy:
; to make use of %pair2 in another BB
call void @llvm.memcpy.p0.p0.i64(ptr %pair2, ptr %pair2, i64 0, i1 false)
br label %end
}
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) #1
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) #1
attributes #1 = { argmemonly nounwind }
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