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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 | a4d074863a4a1c1004fb17eb8b685241fed73a1b (patch) | |
| tree | 631a3f2ecb6e5486c8ada4a3bd2806dc277f3fd1 /llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp | |
| parent | 66ceaa439a9a664c5587b01710694bc1d086650e (diff) | |
| download | bcm5719-llvm-a4d074863a4a1c1004fb17eb8b685241fed73a1b.tar.gz bcm5719-llvm-a4d074863a4a1c1004fb17eb8b685241fed73a1b.zip | |
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.
llvm-svn: 178233
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp index 5e9ad347d33..00037edafc9 100644 --- a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp +++ b/llvm/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; } |
