Renumber SSE execution domains for better code size.

SSEDomainFix will collapse to the domain with the lower number when it has a
choice. The SSEPackedSingle domain often has smaller instructions, so prefer
that.

llvm-svn: 99952

1 files changed, 1 insertions, 4 deletions

diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index 2486d1be66b..f0bdd06cce8 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -399,7 +399,7 @@ namespace X86II {
     GS          = 2 << SegOvrShift,
 
     // Execution domain for SSE instructions in bits 22, 23.
-    // 0 in bits 22-23 means normal, non-SSE instruction. See SSEDomain below.
+    // 0 in bits 22-23 means normal, non-SSE instruction.
     SSEDomainShift = 22,
 
     OpcodeShift   = 24,
@@ -719,9 +719,6 @@ public:
   ///
   unsigned getGlobalBaseReg(MachineFunction *MF) const;
 
-  /// Some SSE instructions come in variants for three domains.
-  enum SSEDomain { NotSSEDomain, PackedInt, PackedSingle, PackedDouble };
-
   /// GetSSEDomain - Return the SSE execution domain of MI as the first element,
   /// and a bitmask of possible arguments to SetSSEDomain ase the second.
   std::pair<uint16_t, uint16_t> GetSSEDomain(const MachineInstr *MI) const;