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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-12-09 03:12:46 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-12-09 03:12:46 +0000 |
| commit | 5518a1355b8b09bf92419b65ea4e4854734b0ebc (patch) | |
| tree | 65b45feeb37acada71ab18f03a9f5b358272e3e7 /lib/Target/X86/X86ISelLowering.cpp | |
| parent | 9472b4fbf96fb840eb416acd00bbee173c62e8da (diff) | |
| download | llvm-5518a1355b8b09bf92419b65ea4e4854734b0ebc.tar.gz llvm-5518a1355b8b09bf92419b65ea4e4854734b0ebc.tar.bz2 llvm-5518a1355b8b09bf92419b65ea4e4854734b0ebc.tar.xz | |
- Re-enable population count loop idiom recognization
- fix a bug which cause sigfault.
- add two testing cases which was causing crash
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169687 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index af772ed7a3..84e5677d6c 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -17679,6 +17679,17 @@ FindInConvertTable(const X86TypeConversionCostTblEntry *Tbl, unsigned len, return -1; } +ScalarTargetTransformInfo::PopcntHwSupport +X86ScalarTargetTransformImpl::getPopcntHwSupport(unsigned TyWidth) const { + assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2"); + const X86Subtarget &ST = TLI->getTargetMachine().getSubtarget<X86Subtarget>(); + + // TODO: Currently the __builtin_popcount() implementation using SSE3 + // instructions is inefficient. Once the problem is fixed, we should + // call ST.hasSSE3() instead of ST.hasSSE4(). + return ST.hasSSE41() ? Fast : None; +} + unsigned X86VectorTargetTransformInfo::getArithmeticInstrCost(unsigned Opcode, Type *Ty) const { |