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| author | Hal Finkel <hfinkel@anl.gov> | 2013-03-28 13:29:47 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-03-28 13:29:47 +0000 |
| commit | c53ab4d77f4b3d2905cf9ad625c28ff6b1c04aff (patch) | |
| tree | b2fcb51be8d19be85b7154477017f83ee096e6da /lib/Target/PowerPC/PPCTargetTransformInfo.cpp | |
| parent | f464481db0c3b5404004b510921ca454803fd1d0 (diff) | |
| download | llvm-c53ab4d77f4b3d2905cf9ad625c28ff6b1c04aff.tar.gz llvm-c53ab4d77f4b3d2905cf9ad625c28ff6b1c04aff.tar.bz2 llvm-c53ab4d77f4b3d2905cf9ad625c28ff6b1c04aff.tar.xz | |
Add the PPC64 popcntd instruction
PPC ISA 2.06 (P7, A2, etc.) has a popcntd instruction. Add this instruction and
tell TTI about it so that popcount-loop recognition will know about it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178233 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCTargetTransformInfo.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCTargetTransformInfo.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/lib/Target/PowerPC/PPCTargetTransformInfo.cpp index 5e9ad347d3..00037edafc 100644 --- a/lib/Target/PowerPC/PPCTargetTransformInfo.cpp +++ b/lib/Target/PowerPC/PPCTargetTransformInfo.cpp @@ -122,9 +122,8 @@ llvm::createPPCTargetTransformInfoPass(const PPCTargetMachine *TM) { PPCTTI::PopcntSupportKind PPCTTI::getPopcntSupport(unsigned TyWidth) const { assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2"); - // FIXME: PPC currently does not have custom popcnt lowering even though - // there is hardware support. Once this is fixed, update this function - // to reflect the real capabilities of the hardware. + if (ST->hasPOPCNTD() && TyWidth <= 64) + return PSK_FastHardware; return PSK_Software; } |