diff options
| -rw-r--r-- | lib/CodeGen/PrologEpilogInserter.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 4c3e796f5e..734bf63252 100644 --- a/lib/CodeGen/PrologEpilogInserter.cpp +++ b/lib/CodeGen/PrologEpilogInserter.cpp @@ -36,6 +36,7 @@ #include "llvm/Support/Debug.h" #include "llvm/ADT/IndexedMap.h" #include "llvm/ADT/SmallSet.h" +#include "llvm/ADT/Statistic.h" #include "llvm/ADT/STLExtras.h" #include <climits> @@ -46,6 +47,9 @@ char PEI::ID = 0; INITIALIZE_PASS(PEI, "prologepilog", "Prologue/Epilogue Insertion", false, false); +STATISTIC(NumVirtualFrameRegs, "Number of virtual frame regs encountered"); +STATISTIC(NumScavengedRegs, "Number of frame index regs scavenged"); + /// createPrologEpilogCodeInserter - This function returns a pass that inserts /// prolog and epilog code, and eliminates abstract frame references. /// @@ -873,6 +877,8 @@ void PEI::scavengeFrameVirtualRegs(MachineFunction &Fn) { } continue; } + ++NumVirtualFrameRegs; + // If this is a def, remember that this insn defines the value. // This lets us properly consider insns which re-use the scratch // register, such as r2 = sub r2, #imm, in the middle of the @@ -945,6 +951,7 @@ void PEI::scavengeFrameVirtualRegs(MachineFunction &Fn) { const TargetRegisterClass *RC = Fn.getRegInfo().getRegClass(Reg); CurrentScratchReg = RS->scavengeRegister(RC, I, SPAdj); PrevValue = Value; + ++NumScavengedRegs; } // replace this reference to the virtual register with the // scratch register. |