70 lines
2.7 KiB
LLVM
70 lines
2.7 KiB
LLVM
; RUN: opt -instcombine -S < %s | FileCheck %s
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@g1 = common global i32* null, align 8
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%struct.S1 = type { i32, float }
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%struct.S2 = type { float, i32 }
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; Check that instcombine preserves metadata when it merges two loads.
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;
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; CHECK: return:
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; CHECK: load i32*, i32** %{{[a-z0-9.]+}}, align 8, !nonnull ![[EMPTYNODE:[0-9]+]]
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; CHECK: load i32, i32* %{{[a-z0-9.]+}}, align 4, !tbaa ![[TBAA:[0-9]+]], !range ![[RANGE:[0-9]+]], !invariant.load ![[EMPTYNODE:[0-9]+]], !alias.scope ![[ALIAS_SCOPE:[0-9]+]], !noalias ![[NOALIAS:[0-9]+]]
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; Function Attrs: nounwind ssp uwtable
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define i32 @phi_load_metadata(%struct.S1* %s1, %struct.S2* %s2, i32 %c, i32** %x0, i32 **%x1) #0 {
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entry:
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%tobool = icmp eq i32 %c, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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%i = getelementptr inbounds %struct.S2, %struct.S2* %s2, i64 0, i32 1
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%val = load i32, i32* %i, align 4, !tbaa !0, !alias.scope !13, !noalias !14, !invariant.load !17, !range !18
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%p0 = load i32*, i32** %x0, align 8, !nonnull !17
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br label %return
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if.end: ; preds = %entry
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%i2 = getelementptr inbounds %struct.S1, %struct.S1* %s1, i64 0, i32 0
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%val2 = load i32, i32* %i2, align 4, !tbaa !2, !alias.scope !15, !noalias !16, !invariant.load !17, !range !19
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%p1 = load i32*, i32** %x1, align 8, !nonnull !17
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br label %return
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return: ; preds = %if.end, %if.then
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%retval = phi i32 [ %val, %if.then ], [ %val2, %if.end ]
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%pval = phi i32* [ %p0, %if.then ], [ %p1, %if.end ]
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store i32* %pval, i32** @g1, align 8
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ret i32 %retval
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}
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; CHECK: ![[EMPTYNODE]] = !{}
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; CHECK: ![[TBAA]] = !{![[TAG1:[0-9]+]], ![[TAG1]], i64 0}
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; CHECK: ![[TAG1]] = !{!"int", !{{[0-9]+}}, i64 0}
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; CHECK: ![[RANGE]] = !{i32 10, i32 25}
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; CHECK: ![[ALIAS_SCOPE]] = !{![[SCOPE0:[0-9]+]], ![[SCOPE1:[0-9]+]], ![[SCOPE2:[0-9]+]]}
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; CHECK: ![[SCOPE0]] = distinct !{![[SCOPE0]], !{{[0-9]+}}, !"scope0"}
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; CHECK: ![[SCOPE1]] = distinct !{![[SCOPE1]], !{{[0-9]+}}, !"scope1"}
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; CHECK: ![[SCOPE2]] = distinct !{![[SCOPE2]], !{{[0-9]+}}, !"scope2"}
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; CHECK: ![[NOALIAS]] = !{![[SCOPE3:[0-9]+]]}
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; CHECK: ![[SCOPE3]] = distinct !{![[SCOPE3]], !{{[0-9]+}}, !"scope3"}
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!0 = !{!1, !4, i64 4}
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!1 = !{!"", !7, i64 0, !4, i64 4}
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!2 = !{!3, !4, i64 0}
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!3 = !{!"", !4, i64 0, !7, i64 4}
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!4 = !{!"int", !5, i64 0}
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!5 = !{!"omnipotent char", !6, i64 0}
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!6 = !{!"Simple C/C++ TBAA"}
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!7 = !{!"float", !5, i64 0}
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!8 = !{!8, !"some domain"}
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!9 = !{!9, !8, !"scope0"}
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!10 = !{!10, !8, !"scope1"}
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!11 = !{!11, !8, !"scope2"}
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!12 = !{!12, !8, !"scope3"}
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!13 = !{!9, !10}
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!14 = !{!11, !12}
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!15 = !{!9, !11}
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!16 = !{!10, !12}
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!17 = !{}
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!18 = !{i32 10, i32 20}
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!19 = !{i32 15, i32 25}
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