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| author | Eric Christopher <echristo@apple.com> | 2011-03-11 01:05:58 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2011-03-11 01:05:58 +0000 |
| commit | de5e101b0db683931132ba4e4d5e13fe0b5c547a (patch) | |
| tree | 02e06ecf389af57bc51b064ed656be0be8f1cf62 /lib/Target | |
| parent | 9ef82ce4fe8e6f9f49c31abeebcc9672985afad4 (diff) | |
| download | llvm-de5e101b0db683931132ba4e4d5e13fe0b5c547a.tar.gz llvm-de5e101b0db683931132ba4e4d5e13fe0b5c547a.tar.bz2 llvm-de5e101b0db683931132ba4e4d5e13fe0b5c547a.tar.xz | |
Change the x86 32-bit scheduler to register pressure and fix up the
corresponding testcases back to the previous versions.
Fixes some performance regressions only seen on 32-bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127441 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 9ce0046f12..910ed2abd1 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -221,7 +221,13 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) // X86 is weird, it always uses i8 for shift amounts and setcc results. setBooleanContents(ZeroOrOneBooleanContent); - setSchedulingPreference(Sched::ILP); + + // For 64-bit since we have so many registers use the ILP scheduler, for + // 32-bit code use the register pressure specific scheduling. + if (Subtarget->is64Bit()) + setSchedulingPreference(Sched::ILP); + else + setSchedulingPreference(Sched::RegPressure); setStackPointerRegisterToSaveRestore(X86StackPtr); if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) { |