diff options
Diffstat (limited to 'lib/CodeGen/PrologEpilogInserter.cpp')
| -rw-r--r-- | lib/CodeGen/PrologEpilogInserter.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 896689cc1e..55298a4dde 100644 --- a/lib/CodeGen/PrologEpilogInserter.cpp +++ b/lib/CodeGen/PrologEpilogInserter.cpp @@ -44,6 +44,16 @@ char PEI::ID = 0; static RegisterPass<PEI> X("prologepilog", "Prologue/Epilogue Insertion"); +// FIXME: For now, the frame index scavenging is off by default and only +// used by the Thumb1 target. When it's the default and replaces the current +// on-the-fly PEI scavenging for all targets, requiresRegisterScavenging() +// will replace this. +cl::opt<bool> +FrameIndexVirtualScavenging("enable-frame-index-scavenging", + cl::Hidden, + cl::desc("Enable frame index elimination with" + "virtual register scavenging")); + /// createPrologEpilogCodeInserter - This function returns a pass that inserts /// prolog and epilog code, and eliminates abstract frame references. /// @@ -56,7 +66,6 @@ bool PEI::runOnMachineFunction(MachineFunction &Fn) { const Function* F = Fn.getFunction(); const TargetRegisterInfo *TRI = Fn.getTarget().getRegisterInfo(); RS = TRI->requiresRegisterScavenging(Fn) ? new RegScavenger() : NULL; - FrameIndexVirtualScavenging = TRI->requiresFrameIndexScavenging(Fn); // Get MachineModuleInfo so that we can track the construction of the // frame. |