It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp
new file mode 100644
index 0000000..41b6846
--- /dev/null
+++ b/tools/llvm-as/llvm-as.cpp
@@ -0,0 +1,141 @@
+//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This utility may be invoked in the following manner:
+// llvm-as --help - Output information about command line switches
+// llvm-as [options] - Read LLVM asm from stdin, write bitcode to stdout
+// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bitcode
+// to the x.bc file.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/Assembly/Parser.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Signals.h"
+#include <fstream>
+#include <iostream>
+#include <memory>
+using namespace llvm;
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Overwrite output files"));
+
+static cl::opt<bool>
+DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden);
+
+static cl::opt<bool>
+DisableVerify("disable-verify", cl::Hidden,
+ cl::desc("Do not run verifier on input LLVM (dangerous!)"));
+
+int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ int exitCode = 0;
+ std::ostream *Out = 0;
+ try {
+ // Parse the file now...
+ ParseError Err;
+ std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename,&Err));
+ if (M.get() == 0) {
+ cerr << argv[0] << ": " << Err.getMessage() << "\n";
+ return 1;
+ }
+
+ if (!DisableVerify) {
+ std::string Err;
+ if (verifyModule(*M.get(), ReturnStatusAction, &Err)) {
+ cerr << argv[0]
+ << ": assembly parsed, but does not verify as correct!\n";
+ cerr << Err;
+ return 1;
+ }
+ }
+
+ if (DumpAsm) cerr << "Here's the assembly:\n" << *M.get();
+
+ if (OutputFilename != "") { // Specified an output filename?
+ if (OutputFilename != "-") { // Not stdout?
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ } else { // Specified stdout
+ // FIXME: cout is not binary!
+ Out = &std::cout;
+ }
+ } else {
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ Out = &std::cout;
+ } else {
+ std::string IFN = InputFilename;
+ int Len = IFN.length();
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
+ // Source ends in .ll
+ OutputFilename = std::string(IFN.begin(), IFN.end()-3);
+ } else {
+ OutputFilename = IFN; // Append a .bc to it
+ }
+ OutputFilename += ".bc";
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 1;
+ }
+
+ Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
+ std::ios::trunc | std::ios::binary);
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ }
+ }
+
+ if (!Out->good()) {
+ cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ return 1;
+ }
+
+ if (Force || !CheckBitcodeOutputToConsole(Out,true))
+ WriteBitcodeToFile(M.get(), *Out);
+ } catch (const std::string& msg) {
+ cerr << argv[0] << ": " << msg << "\n";
+ exitCode = 1;
+ } catch (...) {
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ exitCode = 1;
+ }
+
+ if (Out != &std::cout) delete Out;
+ return exitCode;
+}
+