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eb18f1195e
I have audited all the callers of concatenate and none require duplicate entries to service concatenation. These duplicates serve no purpose but to needlessly embiggen the IR. N.B. Layering getMostGenericAliasScope on top of concatenate makes it O(nlogn + mlogm) instead of O(n*m). llvm-svn: 278836
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]+]], ![[SCOPE2:[0-9]+]], ![[SCOPE1:[0-9]+]]}
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; CHECK: ![[SCOPE0]] = distinct !{![[SCOPE0]], !{{[0-9]+}}, !"scope0"}
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; CHECK: ![[SCOPE2]] = distinct !{![[SCOPE2]], !{{[0-9]+}}, !"scope2"}
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; CHECK: ![[SCOPE1]] = distinct !{![[SCOPE1]], !{{[0-9]+}}, !"scope1"}
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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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