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Incorporate GenerateCode.cpp. Make static things static.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18048 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2004-11-20 20:02:56 +00:00
parent c457fbb5ea
commit 445564a0bc
1 changed files with 291 additions and 104 deletions
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395
tools/llvm-ld/llvm-ld.cpp
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@ -20,109 +20,77 @@
//
//===----------------------------------------------------------------------===//
#include "llvm-ld.h"
#include "llvm/Linker.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Bytecode/WriteBytecodePass.h"
#include "llvm/Bytecode/Writer.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetMachineRegistry.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/System/Signals.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/System/Signals.h"
#include <fstream>
#include <iostream>
#include <memory>
using namespace llvm;
enum OptimizationLevels {
OPT_FAST_COMPILE,
OPT_SIMPLE,
OPT_AGGRESSIVE,
OPT_LINK_TIME,
OPT_AGGRESSIVE_LINK_TIME
};
// Input/Output Options
static cl::list<std::string> InputFilenames(cl::Positional, cl::OneOrMore,
cl::desc("<input bytecode files>"));
namespace {
cl::list<std::string>
InputFilenames(cl::Positional, cl::desc("<input bytecode files>"),
cl::OneOrMore);
static cl::opt<std::string> OutputFilename("o", cl::init("a.out"),
cl::desc("Override output filename"),
cl::value_desc("filename"));
cl::opt<std::string>
OutputFilename("o", cl::desc("Override output filename"), cl::init("a.out"),
cl::value_desc("filename"));
cl::opt<bool>
Verbose("v", cl::desc("Print information about actions taken"));
static cl::opt<bool> Verbose("v",
cl::desc("Print information about actions taken"));
cl::list<std::string>
LibPaths("L", cl::desc("Specify a library search path"), cl::Prefix,
cl::value_desc("directory"));
static cl::list<std::string> LibPaths("L", cl::Prefix,
cl::desc("Specify a library search path"),
cl::value_desc("directory"));
cl::list<std::string>
Libraries("l", cl::desc("Specify libraries to link to"), cl::Prefix,
cl::value_desc("library prefix"));
static cl::list<std::string> Libraries("l", cl::Prefix,
cl::desc("Specify libraries to link to"),
cl::value_desc("library prefix"));
cl::opt<bool>
Strip("s", cl::desc("Strip symbol info from executable"));
static cl::opt<bool> LinkAsLibrary("link-as-library",
cl::desc("Link the .bc files together as a library, not an executable"));
cl::opt<bool>
NoInternalize("disable-internalize",
cl::desc("Do not mark all symbols as internal"));
cl::alias
ExportDynamic("export-dynamic", cl::desc("Alias for -disable-internalize"),
cl::aliasopt(NoInternalize));
static cl::alias Relink("r", cl::aliasopt(LinkAsLibrary),
cl::desc("Alias for -link-as-library"));
cl::opt<bool>
LinkAsLibrary("link-as-library", cl::desc("Link the .bc files together as a"
" library, not an executable"));
cl::alias
Relink("r", cl::desc("Alias for -link-as-library"),
cl::aliasopt(LinkAsLibrary));
cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
MachineArch("march", cl::desc("Architecture to generate assembly for:"));
cl::opt<bool>
Native("native",
cl::desc("Generate a native binary instead of a shell script"));
cl::opt<bool>
NativeCBE("native-cbe",
cl::desc("Generate a native binary with the C backend and GCC"));
// Compatibility options that are ignored but supported by LD
cl::opt<std::string>
CO3("soname", cl::Hidden, cl::desc("Compatibility option: ignored"));
cl::opt<std::string>
CO4("version-script", cl::Hidden, cl::desc("Compatibility option: ignored"));
cl::opt<bool>
CO5("eh-frame-hdr", cl::Hidden, cl::desc("Compatibility option: ignored"));
cl::opt<std::string>
CO6("h", cl::Hidden, cl::desc("Compatibility option: ignored"));
static cl::opt<bool> Native("native",
cl::desc("Generate a native binary instead of a shell script"));
cl::opt<OptimizationLevels> OptLevel(
cl::desc("Choose level of optimization to apply:"),
cl::init(OPT_FAST_COMPILE), cl::values(
clEnumValN(OPT_FAST_COMPILE,"O0",
"An alias for the -O1 option."),
clEnumValN(OPT_FAST_COMPILE,"O1",
"Optimize for linking speed, not execution speed."),
clEnumValN(OPT_SIMPLE,"O2",
"Perform only required/minimal optimizations"),
clEnumValN(OPT_AGGRESSIVE,"O3",
"An alias for the -O2 option."),
clEnumValN(OPT_LINK_TIME,"O4",
"Perform standard link time optimizations"),
clEnumValN(OPT_AGGRESSIVE_LINK_TIME,"O5",
"Perform aggressive link time optimizations"),
clEnumValEnd
)
);
}
static cl::opt<bool>NativeCBE("native-cbe",
cl::desc("Generate a native binary with the C backend and GCC"));
static cl::opt<bool>DisableCompression("disable-compression",cl::init(false),
cl::desc("Disable writing of compressed bytecode files"));
// Compatibility options that are ignored but supported by LD
static cl::opt<std::string> CO3("soname", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<std::string> CO4("version-script", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<bool> CO5("eh-frame-hdr", cl::Hidden,
cl::desc("Compatibility option: ignored"));
static cl::opt<std::string> CO6("h", cl::Hidden,
cl::desc("Compatibility option: ignored"));
/// This is just for convenience so it doesn't have to be passed around
/// everywhere.
static const char* progname = 0;
/// PrintAndReturn - Prints a message to standard error and returns true.
///
@ -130,11 +98,235 @@ namespace {
/// progname - The name of the program (i.e. argv[0]).
/// Message - The message to print to standard error.
///
static int PrintAndReturn(const char *progname, const std::string &Message) {
static int PrintAndReturn(const std::string &Message) {
std::cerr << progname << ": " << Message << "\n";
return 1;
}
/// CopyEnv - This function takes an array of environment variables and makes a
/// copy of it. This copy can then be manipulated any way the caller likes
/// without affecting the process's real environment.
///
/// Inputs:
/// envp - An array of C strings containing an environment.
///
/// Return value:
/// NULL - An error occurred.
///
/// Otherwise, a pointer to a new array of C strings is returned. Every string
/// in the array is a duplicate of the one in the original array (i.e. we do
/// not copy the char *'s from one array to another).
///
static char ** CopyEnv(char ** const envp) {
// Count the number of entries in the old list;
unsigned entries; // The number of entries in the old environment list
for (entries = 0; envp[entries] != NULL; entries++)
/*empty*/;
// Add one more entry for the NULL pointer that ends the list.
++entries;
// If there are no entries at all, just return NULL.
if (entries == 0)
return NULL;
// Allocate a new environment list.
char **newenv = new char* [entries];
if ((newenv = new char* [entries]) == NULL)
return NULL;
// Make a copy of the list. Don't forget the NULL that ends the list.
entries = 0;
while (envp[entries] != NULL) {
newenv[entries] = new char[strlen (envp[entries]) + 1];
strcpy (newenv[entries], envp[entries]);
++entries;
}
newenv[entries] = NULL;
return newenv;
}
/// RemoveEnv - Remove the specified environment variable from the environment
/// array.
///
/// Inputs:
/// name - The name of the variable to remove. It cannot be NULL.
/// envp - The array of environment variables. It cannot be NULL.
///
/// Notes:
/// This is mainly done because functions to remove items from the environment
/// are not available across all platforms. In particular, Solaris does not
/// seem to have an unsetenv() function or a setenv() function (or they are
/// undocumented if they do exist).
///
static void RemoveEnv(const char * name, char ** const envp) {
for (unsigned index=0; envp[index] != NULL; index++) {
// Find the first equals sign in the array and make it an EOS character.
char *p = strchr (envp[index], '=');
if (p == NULL)
continue;
else
*p = '\0';
// Compare the two strings. If they are equal, zap this string.
// Otherwise, restore it.
if (!strcmp(name, envp[index]))
*envp[index] = '\0';
else
*p = '=';
}
return;
}
/// GenerateBytecode - generates a bytecode file from the module provided
void GenerateBytecode(Module* M, const std::string& FileName) {
// Create the output file.
std::ofstream Out(FileName.c_str());
if (!Out.good()) {
PrintAndReturn("error opening '" + FileName + "' for writing!");
return;
}
// Ensure that the bytecode file gets removed from the disk if we get a
// terminating signal.
sys::RemoveFileOnSignal(sys::Path(FileName));
// Write it out
WriteBytecodeToFile(M, Out, !DisableCompression);
// Close the bytecode file.
Out.close();
}
/// GenerateAssembly - generates a native assembly language source file from the
/// specified bytecode file.
///
/// Inputs:
/// InputFilename - The name of the output bytecode file.
/// OutputFilename - The name of the file to generate.
/// llc - The pathname to use for LLC.
/// envp - The environment to use when running LLC.
///
/// Return non-zero value on error.
///
static int GenerateAssembly(const std::string &OutputFilename,
const std::string &InputFilename,
const std::string &llc,
char ** const envp) {
// Run LLC to convert the bytecode file into assembly code.
const char *cmd[6];
cmd[0] = llc.c_str();
cmd[1] = "-f";
cmd[2] = "-o";
cmd[3] = OutputFilename.c_str();
cmd[4] = InputFilename.c_str();
cmd[5] = 0;
return ExecWait(cmd, envp);
}
/// GenerateAssembly - generates a native assembly language source file from the
/// specified bytecode file.
static int GenerateCFile(const std::string &OutputFile,
const std::string &InputFile,
const std::string &llc, char ** const envp) {
// Run LLC to convert the bytecode file into C.
const char *cmd[7];
cmd[0] = llc.c_str();
cmd[1] = "-march=c";
cmd[2] = "-f";
cmd[3] = "-o";
cmd[4] = OutputFile.c_str();
cmd[5] = InputFile.c_str();
cmd[6] = 0;
return ExecWait(cmd, envp);
}
/// GenerateNative - generates a native assembly language source file from the
/// specified assembly source file.
///
/// Inputs:
/// InputFilename - The name of the output bytecode file.
/// OutputFilename - The name of the file to generate.
/// Libraries - The list of libraries with which to link.
/// LibPaths - The list of directories in which to find libraries.
/// gcc - The pathname to use for GGC.
/// envp - A copy of the process's current environment.
///
/// Outputs:
/// None.
///
/// Returns non-zero value on error.
///
static int GenerateNative(const std::string &OutputFilename,
const std::string &InputFilename,
const std::vector<std::string> &Libraries,
const std::vector<std::string> &LibPaths,
const std::string &gcc, char ** const envp) {
// Remove these environment variables from the environment of the
// programs that we will execute. It appears that GCC sets these
// environment variables so that the programs it uses can configure
// themselves identically.
//
// However, when we invoke GCC below, we want it to use its normal
// configuration. Hence, we must sanitize its environment.
char ** clean_env = CopyEnv(envp);
if (clean_env == NULL)
return 1;
RemoveEnv("LIBRARY_PATH", clean_env);
RemoveEnv("COLLECT_GCC_OPTIONS", clean_env);
RemoveEnv("GCC_EXEC_PREFIX", clean_env);
RemoveEnv("COMPILER_PATH", clean_env);
RemoveEnv("COLLECT_GCC", clean_env);
std::vector<const char *> cmd;
// Run GCC to assemble and link the program into native code.
//
// Note:
// We can't just assemble and link the file with the system assembler
// and linker because we don't know where to put the _start symbol.
// GCC mysteriously knows how to do it.
cmd.push_back(gcc.c_str());
cmd.push_back("-fno-strict-aliasing");
cmd.push_back("-O3");
cmd.push_back("-o");
cmd.push_back(OutputFilename.c_str());
cmd.push_back(InputFilename.c_str());
// Adding the library paths creates a problem for native generation. If we
// include the search paths from llvmgcc, then we'll be telling normal gcc
// to look inside of llvmgcc's library directories for libraries. This is
// bad because those libraries hold only bytecode files (not native object
// files). In the end, we attempt to link the bytecode libgcc into a native
// program.
#if 0
// Add in the library path options.
for (unsigned index=0; index < LibPaths.size(); index++) {
cmd.push_back("-L");
cmd.push_back(LibPaths[index].c_str());
}
#endif
// Add in the libraries to link.
std::vector<std::string> Libs(Libraries);
for (unsigned index = 0; index < Libs.size(); index++) {
if (Libs[index] != "crtend") {
Libs[index] = "-l" + Libs[index];
cmd.push_back(Libs[index].c_str());
}
}
cmd.push_back(NULL);
// Run the compiler to assembly and link together the program.
return ExecWait(&(cmd[0]), clean_env);
}
/// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM
/// bytecode file for the program.
static void EmitShellScript(char **argv) {
@ -157,8 +349,7 @@ static void EmitShellScript(char **argv) {
// Output the script to start the program...
std::ofstream Out2(OutputFilename.c_str());
if (!Out2.good())
exit(PrintAndReturn(argv[0], "error opening '" + OutputFilename +
"' for writing!"));
exit(PrintAndReturn("error opening '" + OutputFilename + "' for writing!"));
Out2 << "#!/bin/sh\n";
// Allow user to setenv LLVMINTERP if lli is not in their PATH.
@ -185,7 +376,16 @@ static void EmitShellScript(char **argv) {
Out2.close();
}
// Rightly this should go in a header file but it just seems such a waste.
namespace llvm {
extern void Optimize(Module*);
}
int main(int argc, char **argv, char **envp) {
// Initial global variable above for convenience printing of program name.
progname = argv[0];
// Parse the command line options
cl::ParseCommandLineOptions(argc, argv, " llvm linker for GCC\n");
sys::PrintStackTraceOnErrorSignal();
@ -213,26 +413,13 @@ int main(int argc, char **argv, char **envp) {
LinkLibraries(argv[0], Composite.get(), Libraries, LibPaths,
Verbose, Native);
// Create the output file.
// Optimize the module
Optimize(Composite.get());
// Generate the bytecode for the optimized module.
std::string RealBytecodeOutput = OutputFilename;
if (!LinkAsLibrary) RealBytecodeOutput += ".bc";
std::ofstream Out(RealBytecodeOutput.c_str());
if (!Out.good())
return PrintAndReturn(argv[0], "error opening '" + RealBytecodeOutput +
"' for writing!");
// Ensure that the bytecode file gets removed from the disk if we get a
// terminating signal.
sys::RemoveFileOnSignal(sys::Path(RealBytecodeOutput));
// Generate the bytecode file.
if (GenerateBytecode(Composite.get(), Strip, !NoInternalize, &Out)) {
Out.close();
return PrintAndReturn(argv[0], "error generating bytecode");
}
// Close the bytecode file.
Out.close();
GenerateBytecode(Composite.get(), RealBytecodeOutput);
// If we are not linking a library, generate either a native executable
// or a JIT shell script, depending upon what the user wants.
@ -253,10 +440,10 @@ int main(int argc, char **argv, char **envp) {
std::string llc = FindExecutable("llc", argv[0]);
std::string gcc = FindExecutable("gcc", argv[0]);
if (llc.empty())
return PrintAndReturn(argv[0], "Failed to find llc");
return PrintAndReturn("Failed to find llc");
if (gcc.empty())
return PrintAndReturn(argv[0], "Failed to find gcc");
return PrintAndReturn("Failed to find gcc");
// Generate an assembly language file for the bytecode.
if (Verbose) std::cout << "Generating Assembly Code\n";
@ -278,9 +465,9 @@ int main(int argc, char **argv, char **envp) {
std::string llc = FindExecutable("llc", argv[0]);
std::string gcc = FindExecutable("gcc", argv[0]);
if (llc.empty())
return PrintAndReturn(argv[0], "Failed to find llc");
return PrintAndReturn("Failed to find llc");
if (gcc.empty())
return PrintAndReturn(argv[0], "Failed to find gcc");
return PrintAndReturn("Failed to find gcc");
// Generate an assembly language file for the bytecode.
if (Verbose) std::cout << "Generating Assembly Code\n";