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Use LLVM-style command line (instead of DMD-style)

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Note: For a backward compatible interface, use the new bin/ldmd script. It
      supports all old options while passing on anything it doesn't recognize.

Some changes caused by this:
* -debug and -version are now -d-debug and -d-version due to a conflict with
  standard LLVM options.
* All "flag" options now allow an optional =true/=1/=false/=0 suffix.
* Some "hidden debug switches" starting with "--" were renamed because LLVM
  doesn't care about the number of dashes, so they were conflicting with other
  options (such as -c).
  The new versions start with "-hidden-debug-" instead of "--"
* --help works, but has a non-zero exit code. This breaks some Tango scripts
  which use it to test for compiler existence. See tango.patch.

Some changes not (directly) caused by this;
* (-enable/-disable)-FOO options are now available for pre- and postconditions.
* -march is used instead of -m (like other LLVM programs), but -m is an alias
  for it.
* -defaultlib, -debuglib, -d-debug and -d-version allow comma-separated values.
  The effect should be identical to specifying the same option multiple times.
  I decided against allowing these for some other options because paths might
  contain commas on some systems.
* -fPIC is removed in favor of the standard LLVM option -relocation-model=pic

Bug:
* If -run is specified as the last argument in DFLAGS, no error is generated.
  (Not very serious IMHO)
This commit is contained in:
Frits van Bommel
2009-02-25 17:34:51 +01:00
parent 6a02292c10
commit b3d87205ad
17 changed files with 908 additions and 549 deletions
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15
gen/toobj.cpp
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@@ -24,6 +24,7 @@
#include "llvm/System/Program.h"
#include "llvm/System/Path.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/CommandLine.h"
#include "mars.h"
#include "module.h"
@@ -55,6 +56,12 @@
//////////////////////////////////////////////////////////////////////////////////////////
static llvm::cl::opt<bool> noVerify("noverify",
llvm::cl::desc("Do not run the validation pass before writing bitcode"),
llvm::cl::ZeroOrMore);
//////////////////////////////////////////////////////////////////////////////////////////
// in gen/optimize.cpp
void ldc_optimize_module(llvm::Module* m, char lvl, bool doinline);
@@ -124,10 +131,6 @@ void Module::genobjfile(int multiobj)
// for (unsigned i = 0; i != MAttrs.size(); ++i)
// Features.AddFeature(MAttrs[i]);
// only generate PIC code when -fPIC switch is used
if (global.params.pic)
llvm::TargetMachine::setRelocationModel(llvm::Reloc::PIC_);
// allocate the target machine
std::auto_ptr<llvm::TargetMachine> target(MArch->CtorFn(*ir.module, Features.getString()));
assert(target.get() && "Could not allocate target machine!");
@@ -182,7 +185,7 @@ void Module::genobjfile(int multiobj)
}
// verify the llvm
if (!global.params.novalidate) {
if (!noVerify) {
std::string verifyErr;
Logger::println("Verifying module...");
LOG_SCOPE;
@@ -200,7 +203,7 @@ void Module::genobjfile(int multiobj)
ldc_optimize_module(ir.module, global.params.optimizeLevel, global.params.llvmInline);
// verify the llvm
if (!global.params.novalidate && (global.params.optimizeLevel >= 0 || global.params.llvmInline)) {
if (!noVerify && (global.params.optimizeLevel >= 0 || global.params.llvmInline)) {
std::string verifyErr;
Logger::println("Verifying module... again...");
LOG_SCOPE;