ELF symbol table field st_other support,

excluding visibility bits.

Mips (MicroMips) specific STO handling .

The st_other field settig for STO_MIPS_MICROMIPS

Contributer: Zoran Jovanovic




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175564 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 36 insertions, 6 deletions

diff --git a/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.cpp b/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.cpp
index 9c454d6169..ebcbf9decb 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.cpp
@@ -9,6 +9,9 @@
 #include "MCTargetDesc/MipsELFStreamer.h"
 #include "MipsSubtarget.h"
 #include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCELF.h"
+#include "llvm/MC/MCELFSymbolFlags.h"
+#include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -58,7 +61,22 @@ namespace llvm {
       llvm_unreachable("Unsupported relocation model for e_flags");
 
     MCA.setELFHeaderEFlags(EFlags);
+  }
+
+  // For llc. Set a symbol's STO flags
+  void
+  MipsELFStreamer::emitMipsSTOCG(const MipsSubtarget &Subtarget,
+                                 MCSymbol *Sym,
+                                 unsigned Val) {
 
+    if (hasRawTextSupport())
+      return;
 
+    MCSymbolData &Data = getOrCreateSymbolData(Sym);
+    // The "other" values are stored in the last 6 bits of the second byte
+    // The traditional defines for STO values assume the full byte and thus
+    // the shift to pack it.
+    MCELF::setOther(Data, Val >> 2);
   }
-}
+
+} // namespace llvm
diff --git a/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.h b/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.h
index 360dbe178c..b10ccc78e6 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.h
+++ b/lib/Target/Mips/MCTargetDesc/MipsELFStreamer.h
@@ -12,7 +12,9 @@
 #include "llvm/MC/MCELFStreamer.h"
 
 namespace llvm {
+class MipsAsmPrinter;
 class MipsSubtarget;
+class MCSymbol;
 
 class MipsELFStreamer : public MCELFStreamer {
 public:
@@ -24,7 +26,9 @@ public:
 
   ~MipsELFStreamer() {}
   void emitELFHeaderFlagsCG(const MipsSubtarget &Subtarget);
-//  void emitELFHeaderFlagCG(unsigned Val);
+  void emitMipsSTOCG(const MipsSubtarget &Subtarget,
+                     MCSymbol *Sym,
+                     unsigned Val);
 
   static bool classof(const MCStreamer *S) {
     return S->getKind() == SK_MipsELFStreamer;
diff --git a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
index 9f2d1e4fe5..ff3fd906fd 100644
--- a/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
+++ b/lib/Target/Mips/MCTargetDesc/MipsMCCodeEmitter.cpp
@@ -35,11 +35,13 @@ class MipsMCCodeEmitter : public MCCodeEmitter {
   void operator=(const MipsMCCodeEmitter &) LLVM_DELETED_FUNCTION;
   const MCInstrInfo &MCII;
   MCContext &Ctx;
+  const MCSubtargetInfo &STI;
   bool IsLittleEndian;
 
 public:
-  MipsMCCodeEmitter(const MCInstrInfo &mcii, MCContext &Ctx_, bool IsLittle) :
-    MCII(mcii), Ctx(Ctx_), IsLittleEndian(IsLittle) {}
+  MipsMCCodeEmitter(const MCInstrInfo &mcii, MCContext &Ctx_,
+                    const MCSubtargetInfo &sti, bool IsLittle) :
+    MCII(mcii), Ctx(Ctx_), STI (sti), IsLittleEndian(IsLittle) {}
 
   ~MipsMCCodeEmitter() {}
 
@@ -95,7 +97,7 @@ MCCodeEmitter *llvm::createMipsMCCodeEmitterEB(const MCInstrInfo &MCII,
                                                const MCSubtargetInfo &STI,
                                                MCContext &Ctx)
 {
-  return new MipsMCCodeEmitter(MCII, Ctx, false);
+  return new MipsMCCodeEmitter(MCII, Ctx, STI, false);
 }
 
 MCCodeEmitter *llvm::createMipsMCCodeEmitterEL(const MCInstrInfo &MCII,
@@ -103,7 +105,7 @@ MCCodeEmitter *llvm::createMipsMCCodeEmitterEL(const MCInstrInfo &MCII,
                                                const MCSubtargetInfo &STI,
                                                MCContext &Ctx)
 {
-  return new MipsMCCodeEmitter(MCII, Ctx, true);
+  return new MipsMCCodeEmitter(MCII, Ctx, STI, true);
 }
 
 /// EncodeInstruction - Emit the instruction.
diff --git a/lib/Target/Mips/MipsAsmPrinter.cpp b/lib/Target/Mips/MipsAsmPrinter.cpp
index 003d890818..1876cb6ffa 100644
--- a/lib/Target/Mips/MipsAsmPrinter.cpp
+++ b/lib/Target/Mips/MipsAsmPrinter.cpp
@@ -36,6 +36,7 @@
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ELF.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/Mangler.h"
@@ -231,6 +232,11 @@ void MipsAsmPrinter::EmitFunctionEntryLabel() {
     // OutStreamer.EmitRawText(StringRef("\t.set\tnomicromips"));
     OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
   }
+
+  if (Subtarget->inMicroMipsMode())
+    if (MipsELFStreamer *MES = dyn_cast<MipsELFStreamer>(&OutStreamer))
+      MES->emitMipsSTOCG(*Subtarget, CurrentFnSym,
+      (unsigned)ELF::STO_MIPS_MICROMIPS);
   OutStreamer.EmitLabel(CurrentFnSym);
 }