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[ELF] - Refactor of SymbolBody::compare() 

That makes it a bit shorter.

Differential revision: http://reviews.llvm.org/D18004

llvm-svn: 263144
This commit is contained in:
George Rimar 2016-03-10 18:49:24 +00:00
parent 0556e2217d
commit 3498c7fbd0
1 changed files with 15 additions and 18 deletions
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31
lld/ELF/Symbols.cpp
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@ -106,10 +106,17 @@ static uint8_t getMinVisibility(uint8_t VA, uint8_t VB) {
return std::min(VA, VB);
}
static int compareCommons(DefinedCommon *A, DefinedCommon *B) {
A->MaxAlignment = B->MaxAlignment =
std::max(A->MaxAlignment, B->MaxAlignment);
if (A->Size < B->Size)
return -1;
return 1;
}
// Returns 1, 0 or -1 if this symbol should take precedence
// over the Other, tie or lose, respectively.
template <class ELFT> int SymbolBody::compare(SymbolBody *Other) {
typedef typename ELFFile<ELFT>::uintX_t uintX_t;
assert(!isLazy() && !Other->isLazy());
std::tuple<bool, bool, bool> L(isDefined(), !isShared(), !isWeak());
std::tuple<bool, bool, bool> R(Other->isDefined(), !Other->isShared(),
@ -134,24 +141,14 @@ template <class ELFT> int SymbolBody::compare(SymbolBody *Other) {
if (L != R)
return -1;
if (!std::get<0>(L) || !std::get<1>(L) || !std::get<2>(L))
return 1;
if (isCommon()) {
if (!Other->isCommon())
return -1;
auto *ThisC = cast<DefinedCommon>(this);
auto *OtherC = cast<DefinedCommon>(Other);
uintX_t Align = std::max(ThisC->MaxAlignment, OtherC->MaxAlignment);
if (ThisC->Size >= OtherC->Size) {
ThisC->MaxAlignment = Align;
return 1;
}
OtherC->MaxAlignment = Align;
return -1;
}
if (Other->isCommon())
if (!isDefined() || isShared() || isWeak())
return 1;
if (!isCommon() && !Other->isCommon())
return 0;
if (isCommon() && Other->isCommon())
return compareCommons(cast<DefinedCommon>(this),
cast<DefinedCommon>(Other));
return isCommon() ? -1 : 1;
}
Defined::Defined(Kind K, StringRef Name, bool IsWeak, uint8_t Visibility,