[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
diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
index e6194f6..8833621 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCDuplexInfo.cpp
@@ -80,9 +80,6 @@
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 @@
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) {