Refactoring gc_relocate related code in CodeGenPrepare.cpp

[oota-llvm.git] / lib / MC / WinCOFFStreamer.cpp

diff --git a/lib/MC/WinCOFFStreamer.cpp b/lib/MC/WinCOFFStreamer.cpp
index e6df4651a53615ae8b152afe5573cbf3eaf22c13..8f9aacbb1961ac87f3888e75b834ad1b355d4018 100644 (file)
--- a/lib/MC/WinCOFFStreamer.cpp
+++ b/lib/MC/WinCOFFStreamer.cpp
@@ -12,7 +12,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/StringExtras.h"
-#include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/MC/MCAsmLayout.h"
 #include "llvm/MC/MCAssembler.h"
@@ -23,13 +22,14 @@
 #include "llvm/MC/MCObjectStreamer.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/MCValue.h"
-#include "llvm/MC/MCWin64EH.h"
 #include "llvm/MC/MCWinCOFFStreamer.h"
 #include "llvm/Support/COFF.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/raw_ostream.h"
 
@@ -39,7 +39,7 @@ using namespace llvm;
 
 namespace llvm {
 MCWinCOFFStreamer::MCWinCOFFStreamer(MCContext &Context, MCAsmBackend &MAB,
-                                     MCCodeEmitter &CE, raw_ostream &OS)
+                                     MCCodeEmitter &CE, raw_pwrite_stream &OS)
     : MCObjectStreamer(Context, MAB, OS, &CE), CurSymbol(nullptr) {}
 
 void MCWinCOFFStreamer::EmitInstToData(const MCInst &Inst,
@@ -61,7 +61,7 @@ void MCWinCOFFStreamer::EmitInstToData(const MCInst &Inst,
   DF->getContents().append(Code.begin(), Code.end());
 }
 
-void MCWinCOFFStreamer::InitSections() {
+void MCWinCOFFStreamer::InitSections(bool NoExecStack) {
   // FIXME: this is identical to the ELF one.
   // This emulates the same behavior of GNU as. This makes it easier
   // to compare the output as the major sections are in the same order.
@@ -82,10 +82,6 @@ void MCWinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
   MCObjectStreamer::EmitLabel(Symbol);
 }
 
-void MCWinCOFFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
-  EmitLabel(Symbol);
-}
-
 void MCWinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
   llvm_unreachable("not implemented");
 }
@@ -137,7 +133,7 @@ void MCWinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
   if (!CurSymbol)
     FatalError("storage class specified outside of symbol definition");
 
-  if (StorageClass & ~0xff)
+  if (StorageClass & ~COFF::SSC_Invalid)
     FatalError(Twine("storage class value '") + itostr(StorageClass) +
                "' out of range");
 
@@ -167,7 +163,7 @@ void MCWinCOFFStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
   const MCSymbolRefExpr *SRE = MCSymbolRefExpr::Create(Symbol, getContext());
   MCFixup Fixup = MCFixup::Create(DF->getContents().size(), SRE, FK_SecRel_2);
   DF->getFixups().push_back(Fixup);
-  DF->getContents().resize(DF->getContents().size() + 4, 0);
+  DF->getContents().resize(DF->getContents().size() + 2, 0);
 }
 
 void MCWinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
@@ -188,14 +184,35 @@ void MCWinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
           Symbol->getSection().getVariant() == MCSection::SV_COFF) &&
          "Got non-COFF section in the COFF backend!");
 
-  if (ByteAlignment > 32)
-    report_fatal_error("alignment is limited to 32-bytes");
+  const Triple &T = getContext().getObjectFileInfo()->getTargetTriple();
+  if (T.isKnownWindowsMSVCEnvironment()) {
+    if (ByteAlignment > 32)
+      report_fatal_error("alignment is limited to 32-bytes");
+
+    // Round size up to alignment so that we will honor the alignment request.
+    Size = std::max(Size, static_cast<uint64_t>(ByteAlignment));
+  }
 
   AssignSection(Symbol, nullptr);
 
   MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
   SD.setExternal(true);
   SD.setCommon(Size, ByteAlignment);
+
+  if (!T.isKnownWindowsMSVCEnvironment() && ByteAlignment > 1) {
+    SmallString<128> Directive;
+    raw_svector_ostream OS(Directive);
+    const MCObjectFileInfo *MFI = getContext().getObjectFileInfo();
+
+    OS << " -aligncomm:\"" << Symbol->getName() << "\","
+       << Log2_32_Ceil(ByteAlignment);
+    OS.flush();
+
+    PushSection();
+    SwitchSection(MFI->getDrectveSection());
+    EmitBytes(Directive);
+    PopSection();
+  }
 }
 
 void MCWinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
@@ -213,11 +230,11 @@ void MCWinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
   AssignSection(Symbol, Section);
 
   if (ByteAlignment != 1)
-    new MCAlignFragment(ByteAlignment, /*_Value=*/0, /*_ValueSize=*/0,
+    new MCAlignFragment(ByteAlignment, /*Value=*/0, /*ValueSize=*/0,
                         ByteAlignment, &SectionData);
 
   MCFillFragment *Fragment =
-      new MCFillFragment(/*_Value=*/0, /*_ValueSize=*/0, Size, &SectionData);
+      new MCFillFragment(/*Value=*/0, /*ValueSize=*/0, Size, &SectionData);
   SD.setFragment(Fragment);
 }
 
@@ -242,7 +259,7 @@ void MCWinCOFFStreamer::EmitIdent(StringRef IdentString) {
   llvm_unreachable("not implemented");
 }
 
-void MCWinCOFFStreamer::EmitWin64EHHandlerData() {
+void MCWinCOFFStreamer::EmitWinEHHandlerData() {
   llvm_unreachable("not implemented");
 }