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| author | Hal Finkel <hfinkel@anl.gov> | 2013-03-15 15:27:13 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-03-15 15:27:13 +0000 |
| commit | 2d37f7b979a24930c444f9783173a90a6e548118 (patch) | |
| tree | a30c316b5d17f708c2c44d5d0461baa8452e1622 /lib/Target/PowerPC/PPCISelLowering.h | |
| parent | c0d8dc0eb6e1df872affadba01f60e42275e2863 (diff) | |
| download | external_llvm-2d37f7b979a24930c444f9783173a90a6e548118.zip external_llvm-2d37f7b979a24930c444f9783173a90a6e548118.tar.gz external_llvm-2d37f7b979a24930c444f9783173a90a6e548118.tar.bz2 | |
Enable unaligned memory access on PPC for scalar types
Unaligned access is supported on PPC for non-vector types, and is generally
more efficient than manually expanding the loads and stores.
A few of the existing test cases were using expanded unaligned loads and stores
to test other features (like load/store with update), and for these test cases,
unaligned access remains disabled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177160 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCISelLowering.h')
| -rw-r--r-- | lib/Target/PowerPC/PPCISelLowering.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h index 3931384..8d44d9f 100644 --- a/lib/Target/PowerPC/PPCISelLowering.h +++ b/lib/Target/PowerPC/PPCISelLowering.h @@ -449,6 +449,10 @@ namespace llvm { bool IsMemset, bool ZeroMemset, bool MemcpyStrSrc, MachineFunction &MF) const; + /// Is unaligned memory access allowed for the given type, and is it fast + /// relative to software emulation. + virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast = 0) const; + /// isFMAFasterThanMulAndAdd - Return true if an FMA operation is faster than /// a pair of mul and add instructions. fmuladd intrinsics will be expanded to /// FMAs when this method returns true (and FMAs are legal), otherwise fmuladd |