diff options
Diffstat (limited to 'lib/CodeGen/CGBuiltin.cpp')
-rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index e99121c46d..669a3be0e6 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -10361,6 +10361,27 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID, return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent, llvm::SyncScope::System); } + case X86::BI__shiftleft128: + case X86::BI__shiftright128: { + // FIXME: Once fshl/fshr no longer add an unneeded and and cmov, do this: + // llvm::Function *F = CGM.getIntrinsic( + // BuiltinID == X86::BI__shiftleft128 ? Intrinsic::fshl : Intrinsic::fshr, + // Int64Ty); + // Ops[2] = Builder.CreateZExt(Ops[2], Int64Ty); + // return Builder.CreateCall(F, Ops); + llvm::Type *Int128Ty = Builder.getInt128Ty(); + Value *Val = Builder.CreateOr( + Builder.CreateShl(Builder.CreateZExt(Ops[1], Int128Ty), 64), + Builder.CreateZExt(Ops[0], Int128Ty)); + Value *Amt = Builder.CreateAnd(Builder.CreateZExt(Ops[2], Int128Ty), + llvm::ConstantInt::get(Int128Ty, 0x3f)); + Value *Res; + if (BuiltinID == X86::BI__shiftleft128) + Res = Builder.CreateLShr(Builder.CreateShl(Val, Amt), 64); + else + Res = Builder.CreateLShr(Val, Amt); + return Builder.CreateTrunc(Res, Int64Ty); + } case X86::BI_ReadWriteBarrier: case X86::BI_ReadBarrier: case X86::BI_WriteBarrier: { |