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31 lines
738 B
31 lines
738 B
4 months ago
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; RUN: opt -instcombine -S < %s | FileCheck %s
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declare void @bar()
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declare void @baz()
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; Check that dereferenceable_or_null metadata is combined
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; CHECK-LABEL: cont:
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; CHECK: load i32*, i32**
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; CHECK-SAME: !dereferenceable_or_null ![[DEREF:[0-9]+]]
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define i32* @test_phi_combine_load_metadata(i1 %c, i32** dereferenceable(8) %p1, i32** dereferenceable(8) %p2) {
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br i1 %c, label %t, label %f
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t:
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call void @bar()
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%v1 = load i32*, i32** %p1, align 8, !dereferenceable_or_null !0
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br label %cont
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f:
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call void @baz()
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%v2 = load i32*, i32** %p2, align 8, !dereferenceable_or_null !1
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br label %cont
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cont:
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%res = phi i32* [ %v1, %t ], [ %v2, %f ]
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ret i32* %res
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}
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; CHECK: ![[DEREF]] = !{i64 8}
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!0 = !{i64 8}
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!1 = !{i64 16}
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