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1Fix handling of undef in partial LTO. 

llvm-svn: 262497
This commit is contained in:
Rafael Espindola 2016-03-02 18:21:46 +00:00
parent 62c1a1e7c7
commit cdf3a2a5be
3 changed files with 27 additions and 0 deletions
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2
lld/ELF/SymbolTable.cpp
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@ -156,6 +156,8 @@ template <class ELFT> void SymbolTable<ELFT>::addCombinedLtoObject() {
Obj->parse(DummyGroups);
for (SymbolBody *Body : Obj->getSymbols()) {
Symbol *Sym = insert(Body);
if (!Sym->Body->isUndefined() && Body->isUndefined())
continue;
Sym->Body = Body;
}
}

3
lld/test/ELF/lto/Inputs/undef-mixed.s Normal file
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@ -0,0 +1,3 @@
.globl bar
bar:
retq

22
lld/test/ELF/lto/undef-mixed.ll Normal file
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@ -0,0 +1,22 @@
; REQUIRES: x86
; RUN: llvm-mc %p/Inputs/undef-mixed.s -o %t.o -filetype=obj -triple=x86_64-pc-linux
; RUN: llvm-as %s -o %t2.o
; RUN: ld.lld %t2.o %t.o -o %t.so -shared
; RUN: llvm-readobj -t %t.so | FileCheck %s
; CHECK: Name: bar
; CHECK-NEXT: Value:
; CHECK-NEXT: Size: 0
; CHECK-NEXT: Binding: Global
; CHECK-NEXT: Type: None
; CHECK-NEXT: Other: 0
; CHECK-NEXT: Section: .text
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @bar()
define void @foo() {
call void @bar()
ret void
}