[Mips] TargetStreamer ELF flag Support for default and commandline options.

[oota-llvm.git] / lib / Target / Mips / AsmParser / MipsAsmParser.cpp

diff --git a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index aae2dcd16e7ef4dd91359c313c6e7aa772235170..35ad7680be622d7973e7a380c0a7c621db739d3f 100644 (file)
--- a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -21,6 +21,9 @@
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/MC/MCSymbol.h"
 #include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/ELF.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/ADT/APInt.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/TargetRegistry.h"
 
@@ -194,7 +197,6 @@ class MipsAsmParser : public MCTargetAsmParser {
 
   bool isEvaluated(const MCExpr *Expr);
   bool parseDirectiveSet();
-  bool parseDirectiveMipsHackELFFlags();
   bool parseDirectiveOption();
 
   bool parseSetAtDirective();
@@ -257,6 +259,9 @@ class MipsAsmParser : public MCTargetAsmParser {
   // Example: INSERT.B $w0[n], $1 => 16 > n >= 0
   bool validateMSAIndex(int Val, int RegKind);
 
+  // Set ELF flags based on defaults and commandline arguments.
+  void processInitialEFlags();
+
 public:
   MipsAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
                 const MCInstrInfo &MII)
@@ -264,6 +269,7 @@ public:
         hasConsumedDollar(false) {
     // Initialize the set of available features.
     setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
+    processInitialEFlags();
   }
 
   MCAsmParser &getParser() const { return Parser; }
@@ -2429,17 +2435,6 @@ bool MipsAsmParser::parseDirectiveSet() {
   return true;
 }
 
-bool MipsAsmParser::parseDirectiveMipsHackELFFlags() {
-  int64_t Flags = 0;
-  if (Parser.parseAbsoluteExpression(Flags)) {
-    TokError("unexpected token");
-    return false;
-  }
-
-  getTargetStreamer().emitMipsHackELFFlags(Flags);
-  return false;
-}
-
 /// parseDirectiveWord
 ///  ::= .word [ expression (, expression)* ]
 bool MipsAsmParser::parseDirectiveWord(unsigned Size, SMLoc L) {
@@ -2558,9 +2553,6 @@ bool MipsAsmParser::ParseDirective(AsmToken DirectiveID) {
     return false;
   }
 
-  if (IDVal == ".mips_hack_elf_flags")
-    return parseDirectiveMipsHackELFFlags();
-
   if (IDVal == ".option")
     return parseDirectiveOption();
 
@@ -2577,6 +2569,43 @@ bool MipsAsmParser::ParseDirective(AsmToken DirectiveID) {
   return true;
 }
 
+void MipsAsmParser::processInitialEFlags() {
+  // Start will a clean slate.
+  unsigned EFlags = 0;
+  unsigned FeatureBits = STI.getFeatureBits();
+
+  // Default settings
+  EFlags |= ELF::EF_MIPS_NOREORDER | ELF::EF_MIPS_PIC | ELF::EF_MIPS_ABI_O32;
+
+  // ISA
+  if (FeatureBits & Mips::FeatureMips64r2) {
+    EFlags |= ELF::EF_MIPS_ARCH_64R2;
+    EFlags &= ~ELF::EF_MIPS_ABI_O32;
+  } else if (FeatureBits & Mips::FeatureMips64) {
+    EFlags |= ELF::EF_MIPS_ARCH_64;
+    EFlags &= ~ELF::EF_MIPS_ABI_O32;
+  } else if (FeatureBits & Mips::FeatureMips32r2)
+    EFlags |= ELF::EF_MIPS_ARCH_32R2;
+  else if (FeatureBits & Mips::FeatureMips32)
+    EFlags |= ELF::EF_MIPS_ARCH_32;
+  else if (FeatureBits & Mips::FeatureO32)
+    EFlags |= ELF::EF_MIPS_ABI_O32; // This is really a zero
+
+  // ASE
+  if (FeatureBits & Mips::FeatureMicroMips)
+    EFlags |= ELF::EF_MIPS_MICROMIPS;
+  else if (FeatureBits & Mips::FeatureMips16)
+    EFlags |= ELF::EF_MIPS_ARCH_ASE_M16;
+
+  // ABI
+  // TODO: n32/eabi
+
+  // Linkage model
+  // TODO: pic/cpic/static
+
+  getTargetStreamer().emitMipsELFFlags(EFlags);
+}
+
 extern "C" void LLVMInitializeMipsAsmParser() {
   RegisterMCAsmParser<MipsAsmParser> X(TheMipsTarget);
   RegisterMCAsmParser<MipsAsmParser> Y(TheMipselTarget);