[TableGen] Remove map CodeGenTarget::InstrToIntMap. (#81079)

This patch removes CodeGenTarget::InstrToIntMap, using instead a new
member CodeGenInstruction::EnumVal to store each enum value. This value
is computed and set by CodeGenTarget::computeInstrsByEnum and queried by
CodeGenTarget::getInstrIntValue.

1 files changed, 2 insertions, 4 deletions

diff --git a/llvm/utils/TableGen/CodeGenTarget.cpp b/llvm/utils/TableGen/CodeGenTarget.cpp
index cf0049e..ceaa51b1 100644
--- a/llvm/utils/TableGen/CodeGenTarget.cpp
+++ b/llvm/utils/TableGen/CodeGenTarget.cpp
@@ -539,12 +539,10 @@ void CodeGenTarget::ComputeInstrsByEnum() const {
                std::make_tuple(!D2.getValueAsBit("isPseudo"), D2.getName());
       });
 
-  // Build the instruction-to-int map using the same values emitted by
-  // InstrInfoEmitter::emitEnums.
-  assert(InstrToIntMap.empty());
+  // Assign an enum value to each instruction according to the sorted order.
   unsigned Num = 0;
   for (const CodeGenInstruction *Inst : InstrsByEnum)
-    InstrToIntMap[Inst->TheDef] = Num++;
+    Inst->EnumVal = Num++;
 }