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4a0d76ba2f
Summary: COFF requires that every comdat contain a symbol with the same name as the comdat. ThinLTOBitcodeWriter renames symbols, which may cause this requirement to be violated. This change avoids such violations by renaming comdats if their leaders are renamed. It also keeps comdats together when splitting modules. Reviewers: pcc, mehdi_amini, tejohnson Reviewed By: pcc Subscribers: rnk, Prazek, llvm-commits Differential Revision: https://reviews.llvm.org/D31963 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300019 91177308-0d34-0410-b5e6-96231b3b80d8
81 lines
2.7 KiB
LLVM
81 lines
2.7 KiB
LLVM
; RUN: opt -thinlto-bc -o %t %s
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; RUN: llvm-modextract -n 0 -o - %t | llvm-dis | FileCheck --check-prefix=THIN %s
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; RUN: llvm-modextract -n 1 -o - %t | llvm-dis | FileCheck --check-prefix=MERGED %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.0.24215"
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; Internal comdat leader with type metadata. All comdat members need to live
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; in the merged module, and the comdat needs to be renamed.
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; MERGED: ${{"?lwt[^ ]+}} = comdat any
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$lwt = comdat any
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; External comdat leader, type metadata on non-leader. All comdat
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; members need to live in the merged module, internal members need to
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; be renamed.
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; MERGED: $nlwt = comdat any
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$nlwt = comdat any
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; Comdat with two members without type metadata. All comdat members live in
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; the ThinLTO module and no renaming needs to take place.
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; THIN: $nt = comdat any
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$nt = comdat any
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; MERGED: @lwt_aliasee = private unnamed_addr global
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; MERGED-SAME: comdat(${{"?lwt[^ ]+}})
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@lwt_aliasee = private unnamed_addr global [1 x i8*] [i8* null], comdat($lwt), !type !0
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; MERGED: {{@"?lwt_nl[^ ]+}} = hidden unnamed_addr global
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; MERGED-SAME: comdat(${{"?lwt[^ ]+}})
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; THIN: {{@"?lwt_nl[^ ]+}} = external hidden
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@lwt_nl = internal unnamed_addr global i32 0, comdat($lwt)
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; MERGED: @nlwt_aliasee = private unnamed_addr global
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; MERGED-SAME: comdat($nlwt)
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@nlwt_aliasee = private unnamed_addr global [1 x i8*] [i8* null], comdat($nlwt), !type !0
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; MERGED: @nlwt = unnamed_addr global
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; MERGED-SAME: comdat
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; THIN: @nlwt = external
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@nlwt = unnamed_addr global i32 0, comdat
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; THIN: @nt = internal
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; THIN-SAME: comdat
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@nt = internal unnamed_addr global [1 x i8*] [i8* null], comdat
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; THIN: @nt_nl = internal
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; THIN-SAME: comdat($nt)
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@nt_nl = internal unnamed_addr global i32 0, comdat($nt)
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; MERGED: {{@"?lwt[^ ]+}} = hidden unnamed_addr alias
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; THIN: {{@"?lwt[^ ]+}} = external hidden
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@lwt = internal unnamed_addr alias [1 x i8*], [1 x i8*]* @lwt_aliasee
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; MERGED: {{@"?nlwt_nl[^ ]+}} = hidden unnamed_addr alias
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; THIN: {{@"?nlwt_nl[^ ]+}} = external hidden
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@nlwt_nl = internal unnamed_addr alias [1 x i8*], [1 x i8*]* @nlwt_aliasee
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; The functions below exist just to make sure the globals are used.
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define i8* @lwt_fun() {
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%1 = load i32, i32* @lwt_nl
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%2 = getelementptr inbounds [1 x i8*], [1 x i8*]* @lwt, i32 0, i32 %1
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%3 = load i8*, i8** %2
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ret i8* %3
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}
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define i8* @nlwt_fun() {
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%1 = load i32, i32* @nlwt
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%2 = getelementptr inbounds [1 x i8*], [1 x i8*]* @nlwt_nl, i32 0, i32 %1
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%3 = load i8*, i8** %2
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ret i8* %3
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}
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define i8* @nt_fun() {
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%1 = load i32, i32* @nt_nl
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%2 = getelementptr inbounds [1 x i8*], [1 x i8*]* @nt, i32 0, i32 %1
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%3 = load i8*, i8** %2
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ret i8* %3
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}
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!0 = !{i64 8, !"?AVA@@"}
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