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 :).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95753 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index d22ac3e..e81e7f4 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -32,6 +32,35 @@
/// instruction.
std::string AsmString;
+ class ConstraintInfo {
+ enum { None, EarlyClobber, Tied } Kind;
+ unsigned OtherTiedOperand;
+ public:
+ ConstraintInfo() : Kind(None) {}
+
+ static ConstraintInfo getEarlyClobber() {
+ ConstraintInfo I;
+ I.Kind = EarlyClobber;
+ return I;
+ }
+
+ static ConstraintInfo getTied(unsigned Op) {
+ ConstraintInfo I;
+ I.Kind = Tied;
+ I.OtherTiedOperand = Op;
+ return I;
+ }
+
+ bool isNone() const { return Kind == None; }
+ bool isEarlyClobber() const { return Kind == EarlyClobber; }
+ bool isTied() const { return Kind == Tied; }
+
+ unsigned getTiedOperand() const {
+ assert(isTied());
+ return OtherTiedOperand;
+ }
+ };
+
/// OperandInfo - The information we keep track of for each operand in the
/// operand list for a tablegen instruction.
struct OperandInfo {
@@ -67,7 +96,7 @@
/// Constraint info for this operand. This operand can have pieces, so we
/// track constraint info for each.
- std::vector<std::string> Constraints;
+ std::vector<ConstraintInfo> Constraints;
OperandInfo(Record *R, const std::string &N, const std::string &PMN,
unsigned MION, unsigned MINO, DagInit *MIOI)