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-rw-r--r--utils/TableGen/CodeGenDAGPatterns.h37
1 files changed, 23 insertions, 14 deletions
diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index 66f77ea..9be763f 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -105,7 +105,7 @@ namespace EEVT {
/// MergeInTypeInfo - This merges in type information from the specified
/// argument. If 'this' changes, it returns true. If the two types are
- /// contradictory (e.g. merge f32 into i32) then this throws an exception.
+ /// contradictory (e.g. merge f32 into i32) then this flags an error.
bool MergeInTypeInfo(const EEVT::TypeSet &InVT, TreePattern &TP);
bool MergeInTypeInfo(MVT::SimpleValueType InVT, TreePattern &TP) {
@@ -187,8 +187,8 @@ struct SDTypeConstraint {
/// ApplyTypeConstraint - Given a node in a pattern, apply this type
/// constraint to the nodes operands. This returns true if it makes a
- /// change, false otherwise. If a type contradiction is found, throw an
- /// exception.
+ /// change, false otherwise. If a type contradiction is found, an error
+ /// is flagged.
bool ApplyTypeConstraint(TreePatternNode *N, const SDNodeInfo &NodeInfo,
TreePattern &TP) const;
};
@@ -232,7 +232,7 @@ public:
/// ApplyTypeConstraints - Given a node in a pattern, apply the type
/// constraints for this node to the operands of the node. This returns
/// true if it makes a change, false otherwise. If a type contradiction is
- /// found, throw an exception.
+ /// found, an error is flagged.
bool ApplyTypeConstraints(TreePatternNode *N, TreePattern &TP) const {
bool MadeChange = false;
for (unsigned i = 0, e = TypeConstraints.size(); i != e; ++i)
@@ -446,13 +446,12 @@ public: // Higher level manipulation routines.
/// ApplyTypeConstraints - Apply all of the type constraints relevant to
/// this node and its children in the tree. This returns true if it makes a
- /// change, false otherwise. If a type contradiction is found, throw an
- /// exception.
+ /// change, false otherwise. If a type contradiction is found, flag an error.
bool ApplyTypeConstraints(TreePattern &TP, bool NotRegisters);
/// UpdateNodeType - Set the node type of N to VT if VT contains
- /// information. If N already contains a conflicting type, then throw an
- /// exception. This returns true if any information was updated.
+ /// information. If N already contains a conflicting type, then flag an
+ /// error. This returns true if any information was updated.
///
bool UpdateNodeType(unsigned ResNo, const EEVT::TypeSet &InTy,
TreePattern &TP) {
@@ -514,6 +513,10 @@ class TreePattern {
/// isInputPattern - True if this is an input pattern, something to match.
/// False if this is an output pattern, something to emit.
bool isInputPattern;
+
+ /// hasError - True if the currently processed nodes have unresolvable types
+ /// or other non-fatal errors
+ bool HasError;
public:
/// TreePattern constructor - Parse the specified DagInits into the
@@ -565,13 +568,19 @@ public:
/// InferAllTypes - Infer/propagate as many types throughout the expression
/// patterns as possible. Return true if all types are inferred, false
- /// otherwise. Throw an exception if a type contradiction is found.
+ /// otherwise. Bail out if a type contradiction is found.
bool InferAllTypes(const StringMap<SmallVector<TreePatternNode*,1> >
*NamedTypes=0);
- /// error - Throw an exception, prefixing it with information about this
- /// pattern.
- void error(const std::string &Msg) const;
+ /// error - If this is the first error in the current resolution step,
+ /// print it and set the error flag. Otherwise, continue silently.
+ void error(const std::string &Msg);
+ bool hasError() const {
+ return HasError;
+ }
+ void resetError() {
+ HasError = false;
+ }
void print(raw_ostream &OS) const;
void dump() const;
@@ -602,7 +611,7 @@ public:
: Pattern(TP), Results(results), Operands(operands),
ImpResults(impresults), ResultPattern(0) {}
- const TreePattern *getPattern() const { return Pattern; }
+ TreePattern *getPattern() const { return Pattern; }
unsigned getNumResults() const { return Results.size(); }
unsigned getNumOperands() const { return Operands.size(); }
unsigned getNumImpResults() const { return ImpResults.size(); }
@@ -794,7 +803,7 @@ private:
void GenerateVariants();
void VerifyInstructionFlags();
- void AddPatternToMatch(const TreePattern *Pattern, const PatternToMatch &PTM);
+ void AddPatternToMatch(TreePattern *Pattern, const PatternToMatch &PTM);
void FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
std::map<std::string,
TreePatternNode*> &InstInputs,