Tidied up target triple OS detection. NFC

[oota-llvm.git] / lib / Target / X86 / MCTargetDesc / X86MCAsmInfo.cpp

diff --git a/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp b/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
index 3f80343f01d5d3a32c680e6a770b8a06594ada66..db7f0ae914eb48c8771a786c1275005b670acaf2 100644 (file)
--- a/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
@@ -72,11 +72,10 @@ X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) {
   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
     HasWeakDefCanBeHiddenDirective = false;
 
-  // FIXME: this should not depend on the target OS version, but on the ld64
-  // version in use.  From at least >= ld64-97.17 (Xcode 3.2.6) the abs-ified
-  // FDE relocs may be used. We also use them for the ios simulator.
-  DwarfFDESymbolsUseAbsDiff = (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
-    || T.isiOS();
+  // Assume ld64 is new enough that the abs-ified FDE relocs may be used
+  // (actually, must, since otherwise the non-extern relocations we produce
+  // overwhelm ld64's tiny little mind and it fails).
+  DwarfFDESymbolsUseAbsDiff = true;
 
   UseIntegratedAssembler = true;
 }
@@ -103,9 +102,6 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
 
   TextAlignFillValue = 0x90;
 
-  // Set up DWARF directives
-  HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
-
   // Debug Information
   SupportsDebugInformation = true;
 
@@ -114,8 +110,7 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
 
   // OpenBSD and Bitrig have buggy support for .quad in 32-bit mode, just split
   // into two .words.
-  if ((T.getOS() == Triple::OpenBSD || T.getOS() == Triple::Bitrig) &&
-       T.getArch() == Triple::x86)
+  if ((T.isOSOpenBSD() || T.isOSBitrig()) && T.getArch() == Triple::x86)
     Data64bitsDirective = nullptr;
 
   // Always enable the integrated assembler by default.
@@ -134,17 +129,15 @@ X86_64MCAsmInfoDarwin::getExprForPersonalitySymbol(const MCSymbol *Sym,
   return MCBinaryExpr::CreateAdd(Res, Four, Context);
 }
 
-const MCSection *X86ELFMCAsmInfo::
-getNonexecutableStackSection(MCContext &Ctx) const {
-  return Ctx.getELFSection(".note.GNU-stack", ELF::SHT_PROGBITS,
-                           0, SectionKind::getMetadata());
-}
-
 void X86MCAsmInfoMicrosoft::anchor() { }
 
 X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
-  if (Triple.getArch() == Triple::x86_64)
+  if (Triple.getArch() == Triple::x86_64) {
     PrivateGlobalPrefix = ".L";
+    PointerSize = 8;
+    WinEHEncodingType = WinEH::EncodingType::Itanium;
+    ExceptionsType = ExceptionHandling::ItaniumWinEH;
+  }
 
   AssemblerDialect = AsmWriterFlavor;
 
@@ -158,17 +151,19 @@ X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
 void X86MCAsmInfoGNUCOFF::anchor() { }
 
 X86MCAsmInfoGNUCOFF::X86MCAsmInfoGNUCOFF(const Triple &Triple) {
+  assert(Triple.isOSWindows() && "Windows is the only supported COFF target");
   if (Triple.getArch() == Triple::x86_64) {
     PrivateGlobalPrefix = ".L";
     PointerSize = 8;
+    WinEHEncodingType = WinEH::EncodingType::Itanium;
+    ExceptionsType = ExceptionHandling::ItaniumWinEH;
+  } else {
+    ExceptionsType = ExceptionHandling::DwarfCFI;
   }
 
   AssemblerDialect = AsmWriterFlavor;
 
   TextAlignFillValue = 0x90;
 
-  // Exceptions handling
-  ExceptionsType = ExceptionHandling::DwarfCFI;
-
   UseIntegratedAssembler = true;
 }