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| author | Evan Cheng <evan.cheng@apple.com> | 2011-01-06 07:58:36 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-01-06 07:58:36 +0000 |
| commit | 461f1fc359dff438dad25e809499845b10a3d032 (patch) | |
| tree | 143a2a682ffdd84409d6bd1673e22630d42d565e /lib | |
| parent | cce240d26bbf1c2bec9cfff4838d8d807b215586 (diff) | |
| download | llvm-461f1fc359dff438dad25e809499845b10a3d032.tar.gz llvm-461f1fc359dff438dad25e809499845b10a3d032.tar.bz2 llvm-461f1fc359dff438dad25e809499845b10a3d032.tar.xz | |
Use movups to lower memcpy and memset even if it's not fast (like corei7).
The theory is it's still faster than a pair of movq / a quad of movl. This
will probably hurt older chips like P4 but should run faster on current
and future Intel processors. rdar://8817010
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122955 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index f871b5a770..ddec78bfff 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -1063,12 +1063,8 @@ X86TargetLowering::getOptimalMemOpType(uint64_t Size, // linux. This is because the stack realignment code can't handle certain // cases like PR2962. This should be removed when PR2962 is fixed. const Function *F = MF.getFunction(); - if (NonScalarIntSafe && - !F->hasFnAttr(Attribute::NoImplicitFloat)) { + if (NonScalarIntSafe && !F->hasFnAttr(Attribute::NoImplicitFloat)) { if (Size >= 16 && - (Subtarget->isUnalignedMemAccessFast() || - ((DstAlign == 0 || DstAlign >= 16) && - (SrcAlign == 0 || SrcAlign >= 16))) && Subtarget->getStackAlignment() >= 16) { if (Subtarget->hasSSE2()) return MVT::v4i32; |