Add a temporary option for llc-beta: -enable-lsr-for-ppc, which turns on
Loop Strength Reduction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20399 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
index 01d2d23..4bc5c50 100644
--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
+++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
@@ -33,6 +33,10 @@
cl::opt<bool> AIX("aix",
cl::desc("Generate AIX/xcoff instead of Darwin/MachO"),
cl::Hidden);
+
+ cl::opt<bool> EnablePPCLSR("enable-lsr-for-ppc",
+ cl::desc("Enable LSR for PPC (beta option!)"),
+ cl::Hidden);
}
namespace {
@@ -70,6 +74,9 @@
bool PowerPCTargetMachine::addPassesToEmitAssembly(PassManager &PM,
std::ostream &Out) {
bool LP64 = (0 != dynamic_cast<PPC64TargetMachine *>(this));
+
+ if (EnablePPCLSR)
+ PM.add(createLoopStrengthReducePass());
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());
@@ -113,6 +120,9 @@
}
void PowerPCJITInfo::addPassesToJITCompile(FunctionPassManager &PM) {
+ if (EnablePPCLSR)
+ PM.add(createLoopStrengthReducePass());
+
// FIXME: Implement efficient support for garbage collection intrinsics.
PM.add(createLowerGCPass());