diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 451acca5f3..5d12b0a392 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -181,9 +181,12 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) setSchedulingPreference(Sched::RegPressure); setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister()); - // Bypass i32 with i8 on Atom when compiling with O2 - if (Subtarget->hasSlowDivide() && TM.getOptLevel() >= CodeGenOpt::Default) + // Bypass expensive divides on Atom when compiling with O2 + if (Subtarget->hasSlowDivide() && TM.getOptLevel() >= CodeGenOpt::Default) { addBypassSlowDiv(32, 8); + if (Subtarget->is64Bit()) + addBypassSlowDiv(64, 16); + } if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) { // Setup Windows compiler runtime calls. |