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add a beta option for turning on dag->dag isel 

llvm-svn: 22837
This commit is contained in:
Chris Lattner 2005-08-17 19:33:30 +00:00
parent 43ff01e2e6
commit c6aa80668e
1 changed files with 9 additions and 3 deletions
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12
llvm/lib/Target/PowerPC/PowerPCTargetMachine.cpp
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@ -30,7 +30,10 @@
using namespace llvm;
namespace {
const std::string PPC32ID = "PowerPC/32bit";
const char *PPC32ID = "PowerPC/32bit";
static cl::opt<bool> EnablePPCDAGDAG("enable-ppc-dag-isel", cl::Hidden,
cl::desc("Enable DAG-to-DAG isel for PPC (beta)"));
// Register the targets
RegisterTarget<PPC32TargetMachine>
@ -81,8 +84,11 @@ bool PowerPCTargetMachine::addPassesToEmitFile(PassManager &PM,
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
// Default to pattern ISel
if (PatternISelTriState == 0) {
// Install an instruction selector.
if (EnablePPCDAGDAG) {
PM.add(createPPC32ISelDag(*this));
} else if (PatternISelTriState == 0) {
PM.add(createLowerConstantExpressionsPass());
PM.add(createPPC32ISelSimple(*this));
} else