diff options
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 2348191eba..869b938997 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -38,8 +38,12 @@ #include "llvm/Target/TargetOptions.h" #include "llvm/ADT/SmallSet.h" #include "llvm/ADT/StringExtras.h" +#include "llvm/Support/CommandLine.h" using namespace llvm; +static cl::opt<bool> +DisableMMX("disable-mmx", cl::Hidden); + // Forward declarations. static SDValue getMOVLMask(unsigned NumElems, SelectionDAG &DAG); @@ -573,7 +577,7 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand); } - if (Subtarget->hasMMX()) { + if (!DisableMMX && Subtarget->hasMMX()) { addRegisterClass(MVT::v8i8, X86::VR64RegisterClass); addRegisterClass(MVT::v4i16, X86::VR64RegisterClass); addRegisterClass(MVT::v2i32, X86::VR64RegisterClass); |