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Add some command line options for twiddling the default data layout

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used by opt when a module doesn't specify one.  Patch from Kenneth Uildriks!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84814 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-10-22 00:44:10 +00:00
parent 8000c6c535
commit d331cb3fde
1 changed files with 20 additions and 2 deletions
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22
tools/opt/opt.cpp
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@ -127,6 +127,15 @@ QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
static cl::opt<bool>
AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
static cl::opt<std::string>
DefaultDataLayout("default-data-layout",
cl::desc("data layout string to use if not specified by module"),
cl::value_desc("layout-string"), cl::init(""));
static cl::opt<bool>
NoDefaultDataLayout("no-default-data-layout",
cl::desc("no data layout assumptions unless module specifies data layout"));
// ---------- Define Printers for module and function passes ------------
namespace {
@ -388,12 +397,21 @@ int main(int argc, char **argv) {
PassManager Passes;
// Add an appropriate TargetData instance for this module...
Passes.add(new TargetData(M.get()));
TargetData *TD = 0;
const std::string &ModuleDataLayout = M.get()->getDataLayout();
if (!ModuleDataLayout.empty())
TD = new TargetData(ModuleDataLayout);
else if (!NoDefaultDataLayout)
TD = new TargetData(DefaultDataLayout);
if (TD)
Passes.add(TD);
FunctionPassManager *FPasses = NULL;
if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
FPasses = new FunctionPassManager(new ExistingModuleProvider(M.get()));
FPasses->add(new TargetData(M.get()));
if (TD)
FPasses->add(new TargetData(*TD));
}
// If the -strip-debug command line option was specified, add it. If