Introduce a new CodeGenInstruction::ConstraintInfo class

for representing constraint info semantically instead of
as a c expression that will be blatted out to the .inc
file.  Fix X86RecognizableInstr to use this instead of
parsing C code :).

llvm-svn: 95753

1 files changed, 4 insertions, 7 deletions

diff --git a/llvm/utils/TableGen/X86RecognizableInstr.cpp b/llvm/utils/TableGen/X86RecognizableInstr.cpp
index 2b6e30d93d7..da2de6b3200 100644
--- a/llvm/utils/TableGen/X86RecognizableInstr.cpp
+++ b/llvm/utils/TableGen/X86RecognizableInstr.cpp
@@ -402,13 +402,10 @@ void RecognizableInstr::emitInstructionSpecifier(DisassemblerTables &tables) {
   
   for (operandIndex = 0; operandIndex < numOperands; ++operandIndex) {
     if (OperandList[operandIndex].Constraints.size()) {
-      const std::string &constraint = OperandList[operandIndex].Constraints[0];
-      std::string::size_type tiedToPos;
-
-      if ((tiedToPos = constraint.find(" << 16) | (1 << TOI::TIED_TO))")) !=
-         constraint.npos) {
-        tiedToPos--;
-        operandMapping[operandIndex] = constraint[tiedToPos] - '0';
+      const CodeGenInstruction::ConstraintInfo &Constraint =
+        OperandList[operandIndex].Constraints[0];
+      if (Constraint.isTied()) {
+        operandMapping[operandIndex] = Constraint.getTiedOperand();
       } else {
         ++numPhysicalOperands;
         operandMapping[operandIndex] = operandIndex;