commit 23d952b61120393fbd1b27c00b24e675a60be391
author Michael Kuperstein <michael.m.kuperstein@intel.com> Wed Jul 22 10:49:44 2015 +0000
committer Michael Kuperstein <michael.m.kuperstein@intel.com> Wed Jul 22 10:49:44 2015 +0000
tree d652a613f1e79392d23e1962a685785fbaaee995
parent b6d60a69c0e9a8764b7fc4e12048068c5b0ef3c3

[X86] Add .intel_syntax noprefix directive to intel-syntax x86 asm output

Patch by: michael.zuckerman@intel.com
Differential Revision: http://reviews.llvm.org/D11223

llvm-svn: 242886

llvm/include/llvm/MC/MCStreamer.h

diff --git a/llvm/include/llvm/MC/MCStreamer.h b/llvm/include/llvm/MC/MCStreamer.h
index 6b9b8a1..63e30bc 100644
--- a/llvm/include/llvm/MC/MCStreamer.h
+++ b/llvm/include/llvm/MC/MCStreamer.h
@@ -682,6 +682,8 @@
   virtual void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except);
   virtual void EmitWinEHHandlerData();
 
+  virtual void EmitSyntaxDirective();
+
   /// \brief Emit the given \p Instruction into the current section.
   virtual void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI);
 

llvm/lib/MC/MCAsmStreamer.cpp

diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index 227c937..ec49058 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -78,6 +78,9 @@
     }
     EmitCommentsAndEOL();
   }
+
+  virtual void EmitSyntaxDirective();
+
   void EmitCommentsAndEOL();
 
   /// isVerboseAsm - Return true if this streamer supports verbose assembly at
@@ -480,6 +483,14 @@
   EmitEOL();
 }
 
+void MCAsmStreamer::EmitSyntaxDirective() {
+  if (MAI->getAssemblerDialect() == 1)
+    OS << "\t.intel_syntax noprefix\n";
+  // FIXME: Currently emit unprefix'ed registers.
+  // The intel_syntax directive has one optional argument 
+  // with may have a value of prefix or noprefix.
+}
+
 void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
   OS << "\t.def\t ";
   Symbol->print(OS, MAI);

llvm/lib/MC/MCStreamer.cpp

diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 7fbbbd9..a25cdfa 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -467,6 +467,8 @@
     report_fatal_error("Chained unwind areas can't have handlers!");
 }
 
+void MCStreamer::EmitSyntaxDirective() {}
+
 void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
   EnsureValidWinFrameInfo();
 

llvm/lib/Target/X86/X86AsmPrinter.cpp

diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index 24149e6..9fe849a0 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -535,6 +535,7 @@
           S, MCConstantExpr::create(int64_t(1), MMI->getContext()));
     }
   }
+  OutStreamer->EmitSyntaxDirective();
 }
 
 static void

llvm/test/MC/X86/intel-syntax-print.ll

diff --git a/llvm/test/MC/X86/intel-syntax-print.ll b/llvm/test/MC/X86/intel-syntax-print.ll
new file mode 100644
index 0000000..275e8cd
--- /dev/null
+++ b/llvm/test/MC/X86/intel-syntax-print.ll
@@ -0,0 +1,9 @@
+; RUN: llc -x86-asm-syntax=intel < %s | FileCheck %s -check-prefix=INTEL
+; RUN: llc -x86-asm-syntax=att < %s | FileCheck %s -check-prefix=ATT
+
+; INTEL: .intel_syntax noprefix
+; ATT-NOT: .intel_syntax noprefix
+define i32 @test() {
+entry:
+  ret i32 0
+}