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For Intel Atom, use ILP scheduling always, instead of ILP for 64 bit

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and Hybrid for 32 bit, since benchmarks show ILP scheduling is better
most of the time.

llvm-svn: 156028
This commit is contained in:
Preston Gurd 2012-05-02 22:02:02 +00:00
parent 24f13ffba6
commit 047af997f6
1 changed files with 4 additions and 4 deletions
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8
lib/Target/X86/X86ISelLowering.cpp
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@ -167,11 +167,11 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
// For 64-bit since we have so many registers use the ILP scheduler, for
// 32-bit code use the register pressure specific scheduling.
// For 32 bit Atom, use Hybrid (register pressure + latency) scheduling.
if (Subtarget->is64Bit())
// For Atom, always use ILP scheduling.
if (Subtarget->isAtom())
setSchedulingPreference(Sched::ILP);
else if (Subtarget->is64Bit())
setSchedulingPreference(Sched::ILP);
else if (Subtarget->isAtom())
setSchedulingPreference(Sched::Hybrid);
else
setSchedulingPreference(Sched::RegPressure);
setStackPointerRegisterToSaveRestore(X86StackPtr);