Add the skeleton of an asm parser for mips.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147923 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/AsmParser/CMakeLists.txt

@@ -0,0 +1,6 @@
+include_directories( ${CMAKE_CURRENT_BINARY_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/.. )
+
+add_llvm_library(LLVMMipsAsmParser
+  MipsAsmParser.cpp
+  )
+

lib/Target/Mips/AsmParser/LLVMBuild.txt

@@ -0,0 +1,23 @@
+;===- ./lib/Target/Mips/AsmParser/LLVMBuild.txt ----------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Library
+name = MipsAsmParser
+parent = Mips
+required_libraries = MC MCParser Support MipsDesc MipsInfo
+add_to_library_groups = Mips

lib/Target/Mips/AsmParser/Makefile

@@ -0,0 +1,15 @@
+##===- lib/Target/Mips/AsmParser/Makefile ------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../../../..
+LIBRARYNAME = LLVMMipsAsmParser
+
+# Hack: we need to include 'main' mips target directory to grab private headers
+CPP.Flags += -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
+
+include $(LEVEL)/Makefile.common

lib/Target/Mips/AsmParser/MipsAsmParser.cpp

@@ -0,0 +1,66 @@
+//===-- MipsAsmParser.cpp - Parse Mips assembly to MCInst instructions ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MCTargetDesc/MipsMCTargetDesc.h"
+#include "llvm/MC/MCParser/MCAsmLexer.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+namespace {
+class MipsAsmParser : public MCTargetAsmParser {
+  bool MatchAndEmitInstruction(SMLoc IDLoc,
+                               SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+                               MCStreamer &Out);
+
+  bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
+
+  bool ParseInstruction(StringRef Name, SMLoc NameLoc,
+                                SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+
+  bool ParseDirective(AsmToken DirectiveID);
+
+public:
+  MipsAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
+    : MCTargetAsmParser() {
+  }
+
+};
+}
+
+bool MipsAsmParser::
+MatchAndEmitInstruction(SMLoc IDLoc,
+                        SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+                        MCStreamer &Out) {
+  return true;
+}
+
+bool MipsAsmParser::
+ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) {
+  return true;
+}
+
+bool MipsAsmParser::
+ParseInstruction(StringRef Name, SMLoc NameLoc,
+                 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  return true;
+}
+
+bool MipsAsmParser::
+ParseDirective(AsmToken DirectiveID) {
+  return true;
+}
+
+extern "C" void LLVMInitializeMipsAsmParser() {
+  RegisterMCAsmParser<MipsAsmParser> X(TheMipsTarget);
+  RegisterMCAsmParser<MipsAsmParser> Y(TheMipselTarget);
+  RegisterMCAsmParser<MipsAsmParser> A(TheMips64Target);
+  RegisterMCAsmParser<MipsAsmParser> B(TheMips64elTarget);
+}

lib/Target/Mips/CMakeLists.txt

@@ -33,3 +33,4 @@ add_llvm_target(MipsCodeGen
 add_subdirectory(InstPrinter)
 add_subdirectory(TargetInfo)
 add_subdirectory(MCTargetDesc)
+add_subdirectory(AsmParser)

lib/Target/Mips/LLVMBuild.txt

@@ -16,12 +16,13 @@
 ;===------------------------------------------------------------------------===;
 
 [common]
-subdirectories = InstPrinter MCTargetDesc TargetInfo
+subdirectories = AsmParser InstPrinter MCTargetDesc TargetInfo
 
 [component_0]
 type = TargetGroup
 name = Mips
 parent = Target
+has_asmparser = 1
 has_asmprinter = 1
 has_jit = 1
 

lib/Target/Mips/Makefile

@@ -17,7 +17,7 @@ BUILT_SOURCES = MipsGenRegisterInfo.inc MipsGenInstrInfo.inc \
                 MipsGenDAGISel.inc MipsGenCallingConv.inc \
                 MipsGenSubtargetInfo.inc MipsGenMCCodeEmitter.inc
 
-DIRS = InstPrinter TargetInfo MCTargetDesc
+DIRS = InstPrinter AsmParser TargetInfo MCTargetDesc
 
 include $(LEVEL)/Makefile.common
 

test/MC/Mips/elf_basic.s

@@ -0,0 +1,5 @@
+; RUN: llc -filetype=obj -mtriple mipsel-unknown-linux %s -o - | elf-dump --dump-section-data  | FileCheck -check-prefix=CHECK-LE %s
+
+; Check that we produce the correct endian.
+
+; CHECK-LE: ('e_indent[EI_DATA]', 0x01)