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try being more permissive for if-conversion on ARM V7. see what the nightly 

test run permformance numbers say as to whether it helps.

llvm-svn: 99355
This commit is contained in:
Jim Grosbach 2010-03-24 00:03:13 +00:00
parent 57ebf63da7
commit e0874fa02f
1 changed files with 9 additions and 0 deletions
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9
llvm/lib/Target/ARM/ARMISelLowering.cpp
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@ -40,12 +40,18 @@
#include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/TargetOptions.h" #include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/VectorExtras.h" #include "llvm/ADT/VectorExtras.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h" #include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h" #include "llvm/Support/raw_ostream.h"
#include <sstream> #include <sstream>
using namespace llvm; using namespace llvm;
static cl::opt<bool>
aggressiveV7IfConvert("arm-aggressive-v7-ifcvt", cl::Hidden,
cl::desc("Enable more liberal if-converstion for v7"),
cl::init(false));
static bool CC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT, static bool CC_ARM_APCS_Custom_f64(unsigned &ValNo, EVT &ValVT, EVT &LocVT,
CCValAssign::LocInfo &LocInfo, CCValAssign::LocInfo &LocInfo,
ISD::ArgFlagsTy &ArgFlags, ISD::ArgFlagsTy &ArgFlags,
@ -456,6 +462,9 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
// Generic (and overly aggressive) if-conversion limits. // Generic (and overly aggressive) if-conversion limits.
setIfCvtBlockSizeLimit(10); setIfCvtBlockSizeLimit(10);
setIfCvtDupBlockSizeLimit(2); setIfCvtDupBlockSizeLimit(2);
} else if (aggressiveV7IfConvert && Subtarget->hasV7Ops()) {
setIfCvtBlockSizeLimit(3);
setIfCvtDupBlockSizeLimit(1);
} else if (Subtarget->hasV6Ops()) { } else if (Subtarget->hasV6Ops()) {
setIfCvtBlockSizeLimit(2); setIfCvtBlockSizeLimit(2);
setIfCvtDupBlockSizeLimit(1); setIfCvtDupBlockSizeLimit(1);