Make the big switch: Change MCSectionMachO to represent a section *semantically*

instead of syntactically as a string.  This means that it keeps track of the 
segment, section, flags, etc directly and asmprints them in the right format.
This also includes parsing and validation support for llvm-mc and 
"attribute(section)", so we should now start getting errors about invalid 
section attributes from the compiler instead of the assembler on darwin.

Still todo: 
1) Uniquing of darwin mcsections
2) Move all the Darwin stuff out to MCSectionMachO.[cpp|h]
3) there are a few FIXMEs, for example what is the syntax to get the
   S_GB_ZEROFILL segment type?



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78547 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 3 deletions

diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h
index 0b6fd30a31..2ca196340d 100644
--- a/include/llvm/Target/TargetLoweringObjectFile.h
+++ b/include/llvm/Target/TargetLoweringObjectFile.h
@@ -257,9 +257,30 @@ public:
                                           Mangler *) const;
 
   /// getMachOSection - Return the MCSection for the specified mach-o section.
-  /// FIXME: Switch this to a semantic view eventually.
-  const MCSection *getMachOSection(const char *Name, bool isDirective,
-                                   SectionKind K) const;
+  /// This requires the operands to be valid.
+  const MCSection *getMachOSection(StringRef Segment, StringRef Section,
+                                   unsigned TypeAndAttributes,
+                                   SectionKind K) const {
+    return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
+  }
+  const MCSection *getMachOSection(StringRef Segment, StringRef Section,
+                                   unsigned TypeAndAttributes,
+                                   unsigned Reserved2, SectionKind K) const;
+
+  /// getTextCoalSection - Return the "__TEXT,__textcoal_nt" section we put weak
+  /// symbols into.
+  const MCSection *getTextCoalSection() const {
+    return TextCoalSection;
+  }
+  
+  /// getLazySymbolPointerSection - Return the section corresponding to
+  /// the .lazy_symbol_pointer directive.
+  const MCSection *getLazySymbolPointerSection() const;
+  
+  /// getNonLazySymbolPointerSection - Return the section corresponding to
+  /// the .non_lazy_symbol_pointer directive.
+  const MCSection *getNonLazySymbolPointerSection() const;
+  
 };