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52c19ef944
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
81 lines
2.2 KiB
LLVM
81 lines
2.2 KiB
LLVM
; RUN: opt -name-anon-globals -module-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
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; RUN: opt -passes=name-anon-globals -module-summary < %s | llvm-bcanalyzer -dump | FileCheck %s -check-prefix=BC
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; Check for summary block/records.
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; BC: <SOURCE_FILENAME
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; "h"
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; BC-NEXT: <GLOBALVAR {{.*}} op0=0 op1=1
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; "foo"
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; BC-NEXT: <FUNCTION op0=1 op1=3
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; "bar"
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; BC-NEXT: <FUNCTION op0=4 op1=3
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; "anon.[32 chars].0"
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; BC-NEXT: <FUNCTION op0=7 op1=39
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; "variadic"
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; BC-NEXT: <FUNCTION op0=46 op1=8
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; "llvm.va_start"
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; BC-NEXT: <FUNCTION op0=54 op1=13
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; "f"
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; BC-NEXT: <ALIAS op0=67 op1=1
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; BC: <GLOBALVAL_SUMMARY_BLOCK
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; BC-NEXT: <VERSION
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; BC-NEXT: <FLAGS
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; BC-NEXT: <PERMODULE {{.*}} op0=1 op1=0
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; BC-NEXT: <PERMODULE {{.*}} op0=2 op1=0
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; BC-NEXT: <PERMODULE {{.*}} op0=3 op1=7
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; BC-NEXT: <PERMODULE {{.*}} op0=4 op1=0 op2=4 op3=0
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; BC-NEXT: <ALIAS {{.*}} op0=6 op1=0 op2=3
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; BC-NEXT: </GLOBALVAL_SUMMARY_BLOCK
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; BC: <STRTAB_BLOCK
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; BC-NEXT: blob data = 'hfoobaranon.{{................................}}.0variadicllvm.va_startf{{.*}}'
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; RUN: opt -name-anon-globals -module-summary < %s | llvm-dis | FileCheck %s
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; Check that this round-trips correctly.
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; ModuleID = '<stdin>'
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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-unknown-linux-gnu"
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; CHECK: define i32 @foo()
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; Function Attrs: nounwind uwtable
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define i32 @foo() #0 {
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entry:
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ret i32 1
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}
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; CHECK: define i32 @bar(i32 %x)
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; Function Attrs: nounwind uwtable
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define i32 @bar(i32 %x) #0 {
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entry:
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ret i32 %x
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}
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; FIXME: Anonymous function and alias not currently in summary until
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; follow on fixes to rename anonymous globals and emit alias summary
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; entries are committed.
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; Check an anonymous function as well, since in that case only the alias
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; ends up in the value symbol table and having a summary.
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@f = alias void (), void ()* @0 ; <void ()*> [#uses=0]
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@h = external global void ()* ; <void ()*> [#uses=0]
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define internal void @0() nounwind {
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entry:
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store void()* @0, void()** @h
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br label %return
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return: ; preds = %entry
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ret void
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}
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define i32 @variadic(...) {
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%ap = alloca i8*, align 8
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%ap.0 = bitcast i8** %ap to i8*
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call void @llvm.va_start(i8* %ap.0)
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ret i32 42
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}
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declare void @llvm.va_start(i8*) nounwind
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