//===----------------------------------------------------------------------===//
#include "llvm/MC/MCAsmInfoDarwin.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSectionMachO.h"
using namespace llvm;
+bool MCAsmInfoDarwin::isSectionAtomizableBySymbols(
+ const MCSection &Section) const {
+ const MCSectionMachO &SMO = static_cast<const MCSectionMachO &>(Section);
+
+ // Sections holding 1 byte strings are atomized based on the data they
+ // contain.
+ // Sections holding 2 byte strings require symbols in order to be atomized.
+ // There is no dedicated section for 4 byte strings.
+ if (SMO.getType() == MachO::S_CSTRING_LITERALS)
+ return false;
+
+ if (SMO.getSegmentName() == "__DATA" && SMO.getSectionName() == "__cfstring")
+ return false;
+
+ if (SMO.getSegmentName() == "__DATA" &&
+ SMO.getSectionName() == "__objc_classrefs")
+ return false;
+
+ switch (SMO.getType()) {
+ default:
+ return true;
+
+ // These sections are atomized at the element boundaries without using
+ // symbols.
+ case MachO::S_4BYTE_LITERALS:
+ case MachO::S_8BYTE_LITERALS:
+ case MachO::S_16BYTE_LITERALS:
+ case MachO::S_LITERAL_POINTERS:
+ case MachO::S_NON_LAZY_SYMBOL_POINTERS:
+ case MachO::S_LAZY_SYMBOL_POINTERS:
+ case MachO::S_MOD_INIT_FUNC_POINTERS:
+ case MachO::S_MOD_TERM_FUNC_POINTERS:
+ case MachO::S_INTERPOSING:
+ return false;
+ }
+}
+
MCAsmInfoDarwin::MCAsmInfoDarwin() {
// Common settings for all Darwin targets.
// Syntax:
- GlobalPrefix = "_";
- PrivateGlobalPrefix = "L";
LinkerPrivateGlobalPrefix = "l";
- NeedsSet = true;
- AllowQuotesInName = true;
HasSingleParameterDotFile = false;
+ HasSubsectionsViaSymbols = true;
AlignmentIsInBytes = false;
+ COMMDirectiveAlignmentIsInBytes = false;
+ LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
InlineAsmStart = " InlineAsm Start";
InlineAsmEnd = " InlineAsm End";
// Directives:
- WeakDefDirective = "\t.weak_definition ";
+ HasWeakDefDirective = true;
+ HasWeakDefCanBeHiddenDirective = true;
WeakRefDirective = "\t.weak_reference ";
- HiddenDirective = "\t.private_extern ";
- LCOMMDirective = "\t.lcomm\t";
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
HasMachoZeroFillDirective = true; // Uses .zerofill
+ HasMachoTBSSDirective = true; // Uses .tbss
HasStaticCtorDtorReferenceInStaticMode = true;
- SetDirective = "\t.set";
- ProtectedDirective = "\t.globl\t";
+
+ // FIXME: Change this once MC is the system assembler.
+ HasAggressiveSymbolFolding = false;
+
+ HiddenVisibilityAttr = MCSA_PrivateExtern;
+ HiddenDeclarationVisibilityAttr = MCSA_Invalid;
+
+ // Doesn't support protected visibility.
+ ProtectedVisibilityAttr = MCSA_Invalid;
+
HasDotTypeDotSizeDirective = false;
- UsedDirective = "\t.no_dead_strip\t";
-
- // _foo.eh symbols are currently always exported so that the linker knows
- // about them. This is not necessary on 10.6 and later, but it
- // doesn't hurt anything.
- // FIXME: I need to get this from Triple.
- Is_EHSymbolPrivate = false;
- GlobalEHDirective = "\t.globl\t";
- SupportsWeakOmittedEHFrame = false;
-}
+ HasNoDeadStrip = true;
+ DwarfUsesRelocationsAcrossSections = false;
+
+ UseIntegratedAssembler = true;
+ SetDirectiveSuppressesReloc = true;
+
+ // FIXME: For now keep the previous behavior, AShr, matching the previous
+ // behavior of as(1) (both -q and -Q: resp. LLVM and gas v1.38).
+ // If/when this changes, the AArch64 Darwin special case can go away.
+ UseLogicalShr = false;
+}