//===----------------------------------------------------------------------===//
#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";
- 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 ";
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
HasMachoZeroFillDirective = true; // Uses .zerofill
HasMachoTBSSDirective = true; // Uses .tbss
HasStaticCtorDtorReferenceInStaticMode = true;
-
+
+ // FIXME: Change this once MC is the system assembler.
+ HasAggressiveSymbolFolding = false;
+
HiddenVisibilityAttr = MCSA_PrivateExtern;
+ HiddenDeclarationVisibilityAttr = MCSA_Invalid;
+
// Doesn't support protected visibility.
- ProtectedVisibilityAttr = MCSA_Global;
-
+ ProtectedVisibilityAttr = MCSA_Invalid;
+
HasDotTypeDotSizeDirective = false;
HasNoDeadStrip = true;
- HasSymbolResolver = true;
- DwarfUsesAbsoluteLabelForStmtList = false;
- DwarfUsesLabelOffsetForRanges = false;
-}
+ 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;
+}