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5b4ceacd72
Summary: If LTOUnit splitting is disabled, the module summary analysis computes the summary information necessary to perform single implementation devirtualization during the thin link with the index and no IR. The information collected from the regular LTO IR in the current hybrid WPD algorithm is summarized, including: 1) For vtable definitions, record the function pointers and their offset within the vtable initializer (subsumes the information collected from IR by tryFindVirtualCallTargets). 2) A record for each type metadata summarizing the vtable definitions decorated with that metadata (subsumes the TypeIdentiferMap collected from IR). Also added are the necessary bitcode records, and the corresponding assembly support. The index-based WPD will be sent as a follow-on. Depends on D53890. Reviewers: pcc Subscribers: mehdi_amini, Prazek, inglorion, eraman, steven_wu, dexonsmith, arphaman, llvm-commits Differential Revision: https://reviews.llvm.org/D54815 llvm-svn: 351453
39 lines
2.2 KiB
LLVM
39 lines
2.2 KiB
LLVM
; Test summary parsing of index-based WPD related summary fields
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; RUN: llvm-as %s -o - | llvm-dis -o %t.ll
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; RUN: grep "^\^" %s >%t2
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; RUN: grep "^\^" %t.ll >%t3
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; Expect that the summary information is the same after round-trip through
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; llvm-as and llvm-dis.
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; RUN: diff %t2 %t3
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source_filename = "thinlto-vtable-summary.ll"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-grtev4-linux-gnu"
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%struct.A = type { i32 (...)** }
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%struct.B = type { %struct.A }
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%struct.C = type { %struct.A }
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@_ZTV1B = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.B*, i32)* @_ZN1B1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !1
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@_ZTV1C = constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* undef, i8* bitcast (i32 (%struct.C*, i32)* @_ZN1C1fEi to i8*), i8* bitcast (i32 (%struct.A*, i32)* @_ZN1A1nEi to i8*)] }, !type !0, !type !2
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declare i32 @_ZN1B1fEi(%struct.B*, i32)
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declare i32 @_ZN1A1nEi(%struct.A*, i32)
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declare i32 @_ZN1C1fEi(%struct.C*, i32)
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!0 = !{i64 16, !"_ZTS1A"}
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!1 = !{i64 16, !"_ZTS1B"}
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!2 = !{i64 16, !"_ZTS1C"}
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^0 = module: (path: "<stdin>", hash: (0, 0, 0, 0, 0))
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^1 = gv: (name: "_ZN1A1nEi") ; guid = 1621563287929432257
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^2 = gv: (name: "_ZTV1B", summaries: (variable: (module: ^0, flags: (linkage: external, notEligibleToImport: 0, live: 0, dsoLocal: 0), varFlags: (readonly: 0), vTableFuncs: ((virtFunc: ^3, offset: 16), (virtFunc: ^1, offset: 24)), refs: (^3, ^1)))) ; guid = 5283576821522790367
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^3 = gv: (name: "_ZN1B1fEi") ; guid = 7162046368816414394
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^4 = gv: (name: "_ZTV1C", summaries: (variable: (module: ^0, flags: (linkage: external, notEligibleToImport: 0, live: 0, dsoLocal: 0), varFlags: (readonly: 0), vTableFuncs: ((virtFunc: ^5, offset: 16), (virtFunc: ^1, offset: 24)), refs: (^1, ^5)))) ; guid = 13624023785555846296
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^5 = gv: (name: "_ZN1C1fEi") ; guid = 14876272565662207556
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^6 = typeidMetadata: (name: "_ZTS1A", summary: ((offset: 16, ^2), (offset: 16, ^4))) ; guid = 7004155349499253778
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^7 = typeidMetadata: (name: "_ZTS1B", summary: ((offset: 16, ^2))) ; guid = 6203814149063363976
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^8 = typeidMetadata: (name: "_ZTS1C", summary: ((offset: 16, ^4))) ; guid = 1884921850105019584
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