290a839891
Summary: Records in the module summary index whether the bitcode was compiled with the option necessary to enable splitting the LTO unit (e.g. -fsanitize=cfi, -fwhole-program-vtables, or -fsplit-lto-unit). The information is passed down to the ModuleSummaryIndex builder via a new module flag "EnableSplitLTOUnit", which is propagated onto a flag on the summary index. This is then used during the LTO link to check whether all linked summaries were built with the same value of this flag. If not, an error is issued when we detect a situation requiring whole program visibility of the class hierarchy. This is the case when both of the following conditions are met: 1) We are performing LowerTypeTests or Whole Program Devirtualization. 2) There are type tests or type checked loads in the code. Note I have also changed the ThinLTOBitcodeWriter to also gate the module splitting on the value of this flag. Reviewers: pcc Subscribers: ormris, mehdi_amini, Prazek, inglorion, eraman, steven_wu, dexonsmith, arphaman, dang, llvm-commits Differential Revision: https://reviews.llvm.org/D53890 llvm-svn: 350948
80 lines
2.0 KiB
LLVM
80 lines
2.0 KiB
LLVM
; RUN: opt -thinlto-bc -thinlto-split-lto-unit -o %t %s
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; RUN: llvm-modextract -b -n 0 -o - %t | llvm-dis | FileCheck --check-prefix=M0 %s
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; RUN: llvm-modextract -b -n 1 -o - %t | llvm-dis | FileCheck --check-prefix=M1 %s
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; M0: @g = external constant [9 x i8*]{{$}}
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; M1: @g = constant [9 x i8*]
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@g = constant [9 x i8*] [
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i8* bitcast (i64 (i8*)* @ok1 to i8*),
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i8* bitcast (i64 (i8*, i64)* @ok2 to i8*),
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i8* bitcast (void (i8*)* @wrongtype1 to i8*),
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i8* bitcast (i128 (i8*)* @wrongtype2 to i8*),
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i8* bitcast (i64 ()* @wrongtype3 to i8*),
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i8* bitcast (i64 (i8*, i8*)* @wrongtype4 to i8*),
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i8* bitcast (i64 (i8*, i128)* @wrongtype5 to i8*),
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i8* bitcast (i64 (i8*)* @usesthis to i8*),
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i8* bitcast (i8 (i8*)* @reads to i8*)
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], !type !0
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; M0: define i64 @ok1
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; M1: define available_externally i64 @ok1
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define i64 @ok1(i8* %this) {
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ret i64 42
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}
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; M0: define i64 @ok2
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; M1: define available_externally i64 @ok2
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define i64 @ok2(i8* %this, i64 %arg) {
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%1 = tail call { i64, i1 } @llvm.sadd.with.overflow.i64(i64 %arg, i64 %arg)
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ret i64 %arg
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}
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; M1: declare { i64, i1 } @llvm.sadd.with.overflow.i64(i64, i64)
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declare { i64, i1 } @llvm.sadd.with.overflow.i64(i64, i64)
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; M0: define void @wrongtype1
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; M1: declare void @wrongtype1()
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define void @wrongtype1(i8*) {
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ret void
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}
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; M0: define i128 @wrongtype2
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; M1: declare void @wrongtype2()
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define i128 @wrongtype2(i8*) {
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ret i128 0
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}
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; M0: define i64 @wrongtype3
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; M1: declare void @wrongtype3()
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define i64 @wrongtype3() {
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ret i64 0
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}
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; M0: define i64 @wrongtype4
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; M1: declare void @wrongtype4()
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define i64 @wrongtype4(i8*, i8*) {
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ret i64 0
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}
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; M0: define i64 @wrongtype5
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; M1: declare void @wrongtype5()
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define i64 @wrongtype5(i8*, i128) {
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ret i64 0
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}
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; M0: define i64 @usesthis
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; M1: declare void @usesthis()
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define i64 @usesthis(i8* %this) {
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%i = ptrtoint i8* %this to i64
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ret i64 %i
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}
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; M0: define i8 @reads
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; M1: declare void @reads()
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define i8 @reads(i8* %this) {
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%l = load i8, i8* %this
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ret i8 %l
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}
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!0 = !{i32 0, !"typeid"}
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