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Add some statistics for PEI register scavenging
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112084 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -36,6 +36,7 @@
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#include "llvm/Support/Debug.h"
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#include "llvm/ADT/IndexedMap.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/STLExtras.h"
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#include <climits>
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@ -46,6 +47,9 @@ char PEI::ID = 0;
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INITIALIZE_PASS(PEI, "prologepilog",
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"Prologue/Epilogue Insertion", false, false);
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STATISTIC(NumVirtualFrameRegs, "Number of virtual frame regs encountered");
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STATISTIC(NumScavengedRegs, "Number of frame index regs scavenged");
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/// createPrologEpilogCodeInserter - This function returns a pass that inserts
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/// prolog and epilog code, and eliminates abstract frame references.
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///
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@ -873,6 +877,8 @@ void PEI::scavengeFrameVirtualRegs(MachineFunction &Fn) {
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}
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continue;
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}
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++NumVirtualFrameRegs;
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// If this is a def, remember that this insn defines the value.
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// This lets us properly consider insns which re-use the scratch
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// register, such as r2 = sub r2, #imm, in the middle of the
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@ -945,6 +951,7 @@ void PEI::scavengeFrameVirtualRegs(MachineFunction &Fn) {
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const TargetRegisterClass *RC = Fn.getRegInfo().getRegClass(Reg);
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CurrentScratchReg = RS->scavengeRegister(RC, I, SPAdj);
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PrevValue = Value;
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++NumScavengedRegs;
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}
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// replace this reference to the virtual register with the
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// scratch register.
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