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llvm-6502/include/llvm/MC/MCTargetOptionsCommandFlags.h
Daniel Sanders 3b52084af8 Add ability to emit internal instruction representation to CodeGen assembly output.
Summary:
This patch re-uses the implementation of 'llvm-mc -show-inst' and makes it
available to llc as 'llc -asm-show-inst'.

This is necessary to test parts of MIPS32r6/MIPS64r6 without resorting to
'llc -filetype=obj' tests. For example, on MIPS32r2 and earlier we use the
'jr $rs' instruction for indirect branches and returns. On MIPS32r6, we no
longer have 'jr $rs' and use 'jalr $zero, $rs' instead. The catch is that,
on MIPS32r6, 'jr $rs' is an alias for 'jalr $zero, $rs' and is the preferred
way of writing this instruction. As a result, all MIPS ISA's emit 'jr $rs' in
their assembly output and the assembler encodes this to different opcodes
according to the ISA.

Using this option, we can check that the MCInst really is a JR or a JALR by
matching the emitted comment. This removes the need for a 'llc -filetype=obj'
test.

Reviewers: rafael, dsanders

Reviewed By: dsanders

Subscribers: zoran.jovanovic, llvm-commits

Differential Revision: http://reviews.llvm.org/D4267

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212603 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-09 10:07:36 +00:00

54 lines
2.1 KiB
C++

//===-- MCTargetOptionsCommandFlags.h --------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains machine code-specific flags that are shared between
// different command line tools.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCTARGETOPTIONSCOMMANDFLAGS_H
#define LLVM_MC_MCTARGETOPTIONSCOMMANDFLAGS_H
#include "llvm/Support/CommandLine.h"
#include "llvm/MC/MCTargetOptions.h"
using namespace llvm;
cl::opt<MCTargetOptions::AsmInstrumentation> AsmInstrumentation(
"asm-instrumentation", cl::desc("Instrumentation of inline assembly and "
"assembly source files"),
cl::init(MCTargetOptions::AsmInstrumentationNone),
cl::values(clEnumValN(MCTargetOptions::AsmInstrumentationNone, "none",
"no instrumentation at all"),
clEnumValN(MCTargetOptions::AsmInstrumentationAddress, "address",
"instrument instructions with memory arguments"),
clEnumValEnd));
cl::opt<bool> RelaxAll("mc-relax-all",
cl::desc("When used with filetype=obj, "
"relax all fixups in the emitted object file"));
cl::opt<int> DwarfVersion("dwarf-version", cl::desc("Dwarf version"),
cl::init(0));
cl::opt<bool> ShowMCInst("asm-show-inst",
cl::desc("Emit internal instruction representation to "
"assembly file"));
static inline MCTargetOptions InitMCTargetOptionsFromFlags() {
MCTargetOptions Options;
Options.SanitizeAddress =
(AsmInstrumentation == MCTargetOptions::AsmInstrumentationAddress);
Options.MCRelaxAll = RelaxAll;
Options.DwarfVersion = DwarfVersion;
Options.ShowMCInst = ShowMCInst;
return Options;
}
#endif