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[llvm-objcopy] Simplify alignToAddr with llvm::alignTo 

llvm-svn: 370577
This commit is contained in:
Fangrui Song 2019-08-31 10:48:09 +00:00
parent e62c509cd4
commit b0610c74e7
1 changed files with 2 additions and 15 deletions
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17
llvm/tools/llvm-objcopy/ELF/Object.cpp
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@ -1863,19 +1863,6 @@ void Object::sortSections() {
});
}
static uint64_t alignToAddr(uint64_t Offset, uint64_t Addr, uint64_t Align) {
// Calculate Diff such that (Offset + Diff) & -Align == Addr & -Align.
if (Align == 0)
Align = 1;
auto Diff =
static_cast<int64_t>(Addr % Align) - static_cast<int64_t>(Offset % Align);
// We only want to add to Offset, however, so if Diff < 0 we can add Align and
// (Offset + Diff) & -Align == Addr & -Align will still hold.
if (Diff < 0)
Diff += Align;
return Offset + Diff;
}
// Orders segments such that if x = y->ParentSegment then y comes before x.
static void orderSegments(std::vector<Segment *> &Segments) {
llvm::stable_sort(Segments, compareSegmentsByOffset);
@ -1903,8 +1890,8 @@ static uint64_t layoutSegments(std::vector<Segment *> &Segments,
Seg->Offset =
Parent->Offset + Seg->OriginalOffset - Parent->OriginalOffset;
} else {
Offset = alignToAddr(Offset, Seg->VAddr, Seg->Align);
Seg->Offset = Offset;
Seg->Offset =
alignTo(Offset, std::max<uint64_t>(Seg->Align, 1), Seg->VAddr);
}
Offset = std::max(Offset, Seg->Offset + Seg->FileSize);
}