[Hexagon] Create global std::map lazily.

This could of course be a simple binary search with no global state
involved at all if someone cares enough. Just don't make everyone
linking the hexagon backend pay for it on process startup and shutdown.

llvm-svn: 274437

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
index e6194f61a6b..88336217cc8 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
@@ -80,9 +80,6 @@ static const std::pair<unsigned, unsigned> opcodeData[] = {
     std::make_pair((unsigned)V4_SS2_storewi0, 4096),
     std::make_pair((unsigned)V4_SS2_storewi1, 4352)};
 
-static std::map<unsigned, unsigned>
-    subinstOpcodeMap(std::begin(opcodeData), std::end(opcodeData));
-
 bool HexagonMCInstrInfo::isDuplexPairMatch(unsigned Ga, unsigned Gb) {
   switch (Ga) {
   case HexagonII::HSIG_None:
@@ -587,6 +584,9 @@ bool HexagonMCInstrInfo::isOrderedDuplexPair(MCInstrInfo const &MCII,
   unsigned MIaG = HexagonMCInstrInfo::getDuplexCandidateGroup(MIa),
            MIbG = HexagonMCInstrInfo::getDuplexCandidateGroup(MIb);
 
+  static std::map<unsigned, unsigned> subinstOpcodeMap(std::begin(opcodeData),
+                                                       std::end(opcodeData));
+
   // If a duplex contains 2 insns in the same group, the insns must be
   // ordered such that the numerically smaller opcode is in slot 1.
   if ((MIaG != HexagonII::HSIG_None) && (MIaG == MIbG) && bisReversable) {