Added the first bits of the ARM target assembler to llvm-mc. For now it only
parses the .word directive as 4 bytes and ARMAsmParser::ParseInstruction will
give an error is called. Broke out the test of the .word directive into two
different test cases, one for x86 and one for arm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81817 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
new file mode 100644
index 0000000..c0ca149
--- /dev/null
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -0,0 +1,93 @@
+//===-- ARMAsmParser.cpp - Parse ARM 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 "ARM.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmLexer.h"
+#include "llvm/MC/MCAsmParser.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetAsmParser.h"
+using namespace llvm;
+
+namespace {
+struct ARMOperand;
+
+class ARMAsmParser : public TargetAsmParser {
+ MCAsmParser &Parser;
+
+private:
+ MCAsmParser &getParser() const { return Parser; }
+
+ MCAsmLexer &getLexer() const { return Parser.getLexer(); }
+
+ void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
+
+ bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
+
+ bool ParseDirectiveWord(unsigned Size, SMLoc L);
+
+public:
+ ARMAsmParser(const Target &T, MCAsmParser &_Parser)
+ : TargetAsmParser(T), Parser(_Parser) {}
+
+ virtual bool ParseInstruction(const StringRef &Name, MCInst &Inst);
+
+ virtual bool ParseDirective(AsmToken DirectiveID);
+};
+
+} // end anonymous namespace
+
+bool ARMAsmParser::ParseInstruction(const StringRef &Name, MCInst &Inst) {
+ SMLoc Loc = getLexer().getTok().getLoc();
+ Error(Loc, "ARMAsmParser::ParseInstruction currently unimplemented");
+ return true;
+}
+
+bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
+ StringRef IDVal = DirectiveID.getIdentifier();
+ if (IDVal == ".word")
+ return ParseDirectiveWord(4, DirectiveID.getLoc());
+ return true;
+}
+
+/// ParseDirectiveWord
+/// ::= .word [ expression (, expression)* ]
+bool ARMAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ for (;;) {
+ const MCExpr *Value;
+ if (getParser().ParseExpression(Value))
+ return true;
+
+ getParser().getStreamer().EmitValue(Value, Size);
+
+ if (getLexer().is(AsmToken::EndOfStatement))
+ break;
+
+ // FIXME: Improve diagnostic.
+ if (getLexer().isNot(AsmToken::Comma))
+ return Error(L, "unexpected token in directive");
+ getLexer().Lex();
+ }
+ }
+
+ getLexer().Lex();
+ return false;
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeARMAsmParser() {
+ RegisterAsmParser<ARMAsmParser> X(TheARMTarget);
+ RegisterAsmParser<ARMAsmParser> Y(TheThumbTarget);
+}
diff --git a/lib/Target/ARM/AsmParser/CMakeLists.txt b/lib/Target/ARM/AsmParser/CMakeLists.txt
new file mode 100644
index 0000000..e47c643
--- /dev/null
+++ b/lib/Target/ARM/AsmParser/CMakeLists.txt
@@ -0,0 +1,6 @@
+include_directories( ${CMAKE_CURRENT_BINARY_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/.. )
+
+add_llvm_library(LLVMARMAsmParser
+ ARMAsmParser.cpp
+ )
+add_dependencies(LLVMARMAsmParser)
diff --git a/lib/Target/ARM/AsmParser/Makefile b/lib/Target/ARM/AsmParser/Makefile
new file mode 100644
index 0000000..97e5612
--- /dev/null
+++ b/lib/Target/ARM/AsmParser/Makefile
@@ -0,0 +1,15 @@
+##===- lib/Target/ARM/AsmParser/Makefile -------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../../../..
+LIBRARYNAME = LLVMARMAsmParser
+
+# Hack: we need to include 'main' ARM target directory to grab private headers
+CPPFLAGS = -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
+
+include $(LEVEL)/Makefile.common
diff --git a/lib/Target/ARM/Makefile b/lib/Target/ARM/Makefile
index d879521..a8dd38c 100644
--- a/lib/Target/ARM/Makefile
+++ b/lib/Target/ARM/Makefile
@@ -18,6 +18,6 @@
ARMGenDAGISel.inc ARMGenSubtarget.inc \
ARMGenCodeEmitter.inc ARMGenCallingConv.inc
-DIRS = AsmPrinter TargetInfo
+DIRS = AsmPrinter AsmParser TargetInfo
include $(LEVEL)/Makefile.common
diff --git a/test/MC/AsmParser/arm_word_directive.s b/test/MC/AsmParser/arm_word_directive.s
new file mode 100644
index 0000000..7833691
--- /dev/null
+++ b/test/MC/AsmParser/arm_word_directive.s
@@ -0,0 +1,6 @@
+@ RUN: llvm-mc -triple arm-unknown-unknown %s | FileCheck %s
+
+@ CHECK: TEST0:
+@ CHECK: .long 3
+TEST0:
+ .word 3
diff --git a/test/MC/AsmParser/directive_values.s b/test/MC/AsmParser/directive_values.s
index 900fb73..beac69a 100644
--- a/test/MC/AsmParser/directive_values.s
+++ b/test/MC/AsmParser/directive_values.s
@@ -19,8 +19,3 @@
# CHECK: .quad 9
TEST3:
.quad 9
-
-# CHECK: TEST4:
-# CHECK: .short 3
-TEST4:
- .word 3
diff --git a/test/MC/AsmParser/x86_word_directive.s b/test/MC/AsmParser/x86_word_directive.s
new file mode 100644
index 0000000..2950c8c
--- /dev/null
+++ b/test/MC/AsmParser/x86_word_directive.s
@@ -0,0 +1,6 @@
+# RUN: llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
+
+# CHECK: TEST0:
+# CHECK: .short 3
+TEST0:
+ .word 3