Differential D45181 Diff 148194 llvm/trunk/lib/MC/MCAssembler.cpp

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llvm/trunk/lib/MC/MCAssembler.cpp

Show First 20 Lines • Show All 714 Lines • ▼ Show 20 Lines	MCAssembler::handleFixup(const MCAsmLayout &Layout, MCFragment &F,
uint64_t FixedValue;		uint64_t FixedValue;
bool WasForced;		bool WasForced;
bool IsResolved = evaluateFixup(Layout, Fixup, &F, Target, FixedValue,		bool IsResolved = evaluateFixup(Layout, Fixup, &F, Target, FixedValue,
WasForced);		WasForced);
if (!IsResolved) {		if (!IsResolved) {
// The fixup was unresolved, we need a relocation. Inform the object		// The fixup was unresolved, we need a relocation. Inform the object
// writer of the relocation, and give it an opportunity to adjust the		// writer of the relocation, and give it an opportunity to adjust the
// fixup value if need be.		// fixup value if need be.
getWriter().recordRelocation(*this, Layout, &F, Fixup, Target, FixedValue);		if (Target.getSymA() && Target.getSymB() &&
		getBackend().requiresDiffExpressionRelocations()) {
		// The fixup represents the difference between two symbols, which the
		// backend has indicated must be resolved at link time. Split up the fixup
		// into two relocations, one for the add, and one for the sub, and emit
		// both of these. The constant will be associated with the add half of the
		// expression.
		MCFixup FixupAdd = MCFixup::createAddFor(Fixup);
		MCValue TargetAdd =
		MCValue::get(Target.getSymA(), nullptr, Target.getConstant());
		getWriter().recordRelocation(*this, Layout, &F, FixupAdd, TargetAdd,
		FixedValue);
		MCFixup FixupSub = MCFixup::createSubFor(Fixup);
		MCValue TargetSub = MCValue::get(Target.getSymB());
		getWriter().recordRelocation(*this, Layout, &F, FixupSub, TargetSub,
		FixedValue);
		} else {
		getWriter().recordRelocation(*this, Layout, &F, Fixup, Target,
		FixedValue);
		}
}		}
return std::make_tuple(Target, FixedValue, IsResolved);		return std::make_tuple(Target, FixedValue, IsResolved);
}		}

void MCAssembler::layout(MCAsmLayout &Layout) {		void MCAssembler::layout(MCAsmLayout &Layout) {
assert(getBackendPtr() && "Expected assembler backend");		assert(getBackendPtr() && "Expected assembler backend");
DEBUG_WITH_TYPE("mc-dump", {		DEBUG_WITH_TYPE("mc-dump", {
errs() << "assembler backend - pre-layout\n--\n";		errs() << "assembler backend - pre-layout\n--\n";
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