More data/parsing support for tls directives. Add a few more testcases

and cleanup comments as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103985 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/TargetLoweringObjectFileImpl.h

@@ -84,19 +84,23 @@ public:
 
 
 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
-  /// TLSDataSection - Section directive for Thread Local data.
+  /// TLSDataSection - Section for thread local data.
   ///
   const MCSection *TLSDataSection;        // Defaults to ".tdata".
 
-  /// TLSBSSSection - Section directive for Thread Local uninitialized data.
+  /// TLSBSSSection - Section for thread local uninitialized data.
   ///
   const MCSection *TLSBSSSection;         // Defaults to ".tbss".
   
-  /// TLSTLVSection - Section directive for Thread Local structure infomation.
+  /// TLSTLVSection - Section for thread local structure infomation.
   /// Contains the source code name of the variable, visibility and a pointer
   /// to the initial value (.tdata or .tbss).
   const MCSection *TLSTLVSection;         // Defaults to ".tlv".
   
+  /// TLSThreadInitSection - Section for thread local data initialization
+  /// functions.
+  const MCSection *TLSThreadInitSection;  // Defaults to ".thread_init_func".
+  
   const MCSection *CStringSection;
   const MCSection *UStringSection;
   const MCSection *TextCoalSection;

include/llvm/MC/MCSectionMachO.h

@@ -98,7 +98,7 @@ public:
     S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14U,
     /// S_THREAD_LOCAL_INIT_FUNCTION_POINTERS - Section with thread local
     /// variable initialization pointers to functions.
-    S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15,
+    S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15U,
 
     LAST_KNOWN_SECTION_TYPE = S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
     

lib/CodeGen/TargetLoweringObjectFileImpl.cpp

@@ -475,6 +475,12 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
     = getContext().getMachOSection("__DATA", "__thread_vars",
                                    MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
                                    SectionKind::getDataRel());
+                                   
+  TLSThreadInitSection
+    = getContext().getMachOSection("__DATA", "__thread_init",
+                          MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
+                          SectionKind::getDataRel());
+                                   
   CStringSection // .cstring
     = getContext().getMachOSection("__TEXT", "__cstring", 
                                    MCSectionMachO::S_CSTRING_LITERALS,

lib/MC/MCParser/AsmParser.cpp

@@ -623,6 +623,16 @@ bool AsmParser::ParseStatement() {
       return ParseDirectiveSectionSwitch("__OBJC", "__selector_strs",
                                          MCSectionMachO::S_CSTRING_LITERALS);
     
+    if (IDVal == ".tdata")
+      return ParseDirectiveSectionSwitch("__DATA", "__thread_data",
+                                        MCSectionMachO::S_THREAD_LOCAL_REGULAR);
+    if (IDVal == ".tlv")
+      return ParseDirectiveSectionSwitch("__DATA", "__thread_vars",
+                                      MCSectionMachO::S_THREAD_LOCAL_VARIABLES);
+    if (IDVal == ".thread_init_func")
+      return ParseDirectiveSectionSwitch("__DATA", "__thread_init",
+                        MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS);
+    
     // Assembler features
     if (IDVal == ".set")
       return ParseDirectiveSet();

test/MC/AsmParser/directive_tbss.s

@@ -1,4 +1,4 @@
-# RUN: llvm-mc -triple i386-unknown-darwin %s | FileCheck %s
+# RUN: llvm-mc -triple x86_64-unknown-darwin %s | FileCheck %s
 
 # CHECK: .tbss _a$tlv$init, 4
 # CHECK: .tbss _b$tlv$init, 4, 3

test/MC/AsmParser/directive_tdata.s

@@ -0,0 +1,9 @@
+# RUN: llvm-mc -triple x86_64-unknown-darwin %s | FileCheck %s
+
+# CHECK:	__DATA,__thread_data,thread_local_regular
+# CHECK:	_a$tlv$init:
+# CHECK:	.quad 4
+
+	.tdata
+_a$tlv$init:
+	.quad 4

test/MC/AsmParser/directive_thread_init_func.s

@@ -0,0 +1,7 @@
+# RUN: llvm-mc -triple x86_64-unknown-darwin %s | FileCheck %s
+
+# CHECK: __DATA,__thread_init,thread_local_init_function_pointers
+# CHECK: .quad 0
+
+.thread_init_func
+	.quad 0

test/MC/AsmParser/directive_tlv.s

@@ -0,0 +1,13 @@
+# RUN: llvm-mc -triple x86_64-unknown-darwin %s | FileCheck %s
+
+# CHECK:	__DATA,__thread_vars,thread_local_variables
+# CHECK:	.globl _a
+# CHECK:	_a:
+# CHECK:	.quad 0
+
+	.tlv
+.globl _a
+_a:
+	.quad 0
+	.quad 0
+	.quad 0