1 files changed, 43 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 2323f5790a..eeb020ba3b 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -3658,3 +3658,46 @@ unsigned X86InstrInfo::getGlobalBaseReg(MachineFunction *MF) const {
   X86FI->setGlobalBaseReg(GlobalBaseReg);
   return GlobalBaseReg;
 }
+
+X86InstrInfo::SSEDomain X86InstrInfo::GetSSEDomain(const MachineInstr *MI,
+                                                 const unsigned *&equiv) const {
+  // These are the replaceable SSE instructions. Some of these have Int variants
+  // that we don't include here. We don't want to replace instructions selected
+  // by intrinsics.
+  static const unsigned ReplaceableInstrs[][3] = {
+    //PackedInt          PackedSingle     PackedDouble
+    { X86::MOVDQAmr,     X86::MOVAPSmr,   X86::MOVAPDmr   },
+    { X86::MOVDQArm,     X86::MOVAPSrm,   X86::MOVAPDrm   },
+    { X86::MOVDQArr,     X86::MOVAPSrr,   X86::MOVAPDrr   },
+    { X86::MOVDQUmr,     X86::MOVUPSmr,   X86::MOVUPDmr   },
+    { X86::MOVDQUrm,     X86::MOVUPSrm,   X86::MOVUPDrm   },
+    { X86::MOVNTDQmr,    X86::MOVNTPSmr,  X86::MOVNTPDmr  },
+    { X86::PANDNrm,      X86::ANDNPSrm,   X86::ANDNPDrm   },
+    { X86::PANDNrr,      X86::ANDNPSrr,   X86::ANDNPDrr   },
+    { X86::PANDrm,       X86::ANDPSrm,    X86::ANDPDrm    },
+    { X86::PANDrr,       X86::ANDPSrr,    X86::ANDPDrr    },
+    { X86::PORrm,        X86::ORPSrm,     X86::ORPDrm     },
+    { X86::PORrr,        X86::ORPSrr,     X86::ORPDrr     },
+    { X86::PUNPCKHQDQrm, X86::UNPCKHPSrm, X86::UNPCKHPDrm },
+    { X86::PUNPCKHQDQrr, X86::UNPCKHPSrr, X86::UNPCKHPDrr },
+    { X86::PUNPCKLQDQrm, X86::UNPCKLPSrm, X86::UNPCKLPDrm },
+    { X86::PUNPCKLQDQrr, X86::UNPCKLPSrr, X86::UNPCKLPDrr },
+    { X86::PXORrm,       X86::XORPSrm,    X86::XORPDrm    },
+    { X86::PXORrr,       X86::XORPSrr,    X86::XORPDrr    },
+  };
+
+  const SSEDomain domain =
+    SSEDomain((MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3);
+  if (domain == NotSSEDomain)
+    return domain;
+
+  // Linear search FTW!
+  const unsigned opc = MI->getOpcode();
+  for (unsigned i = 0, e = array_lengthof(ReplaceableInstrs); i != e; ++i)
+    if (ReplaceableInstrs[i][domain-1] == opc) {
+      equiv = ReplaceableInstrs[i];
+      return domain;
+    }
+  equiv = 0;
+  return domain;
+}