diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 3db7a4605c4..1130fcf9c36 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -78,6 +78,13 @@ static cl::opt<int> ExperimentalPrefLoopAlignment( " of the loop header PC will be 0)."), cl::Hidden); +// Added in 10.0. +static cl::opt<bool> EnableOldKNLABI( + "x86-enable-old-knl-abi", cl::init(false), + cl::desc("Enables passing v32i16 and v64i8 in 2 YMM registers instead of " + "one ZMM register on AVX512F, but not AVX512BW targets."), + cl::Hidden); + static cl::opt<bool> MulConstantOptimization( "mul-constant-optimization", cl::init(true), cl::desc("Replace 'mul x, Const' with more effective instructions like " @@ -1960,6 +1967,10 @@ MVT X86TargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context, EVT VT) const { if (VT == MVT::v32i1 && Subtarget.hasAVX512() && !Subtarget.hasBWI()) return MVT::v32i8; + // FIXME: Should we just make these types legal and custom split operations? + if ((VT == MVT::v32i16 || VT == MVT::v64i8) && + Subtarget.hasAVX512() && !Subtarget.hasBWI() && !EnableOldKNLABI) + return MVT::v16i32; return TargetLowering::getRegisterTypeForCallingConv(Context, CC, VT); } @@ -1968,6 +1979,10 @@ unsigned X86TargetLowering::getNumRegistersForCallingConv(LLVMContext &Context, EVT VT) const { if (VT == MVT::v32i1 && Subtarget.hasAVX512() && !Subtarget.hasBWI()) return 1; + // FIXME: Should we just make these types legal and custom split operations? + if ((VT == MVT::v32i16 || VT == MVT::v64i8) && + Subtarget.hasAVX512() && !Subtarget.hasBWI() && !EnableOldKNLABI) + return 1; return TargetLowering::getNumRegistersForCallingConv(Context, CC, VT); } |
