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Plan for pattern graph

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York Jasper Niebuhr 2025-10-13 22:39:45 +02:00
parent 3620d4ffc1
commit ae1d962dff
1 changed files with 40 additions and 25 deletions
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65
plugin/pattern.cpp
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@ -2,8 +2,29 @@
#include <unordered_map>
class LocationPattern {
class PatternNode {
public:
enum OP { NOP /* just move */, ADD, SUB, NEG, CALL, MEMREF };
private:
OP m_op;
public:
// ...
};
class PatternEdge {
public:
enum DATATYPE { VAR, CONST, FIELDOFF /* field offset is specialization of CONST */ };
private:
DATATYPE m_datatype;
// std::size_t m_datasize;
public:
// ...
};
// TODO -> build pattern tree from output root to input leafs
class LocationPattern {
// ...
public:
LocationPattern() {}
~LocationPattern() {}
@ -28,35 +49,29 @@ int register_gimple_statement_pattern(gimple_stmt_iterator* gsi) {
LocationPattern& pattern = lp_it->second;
/*
scan_stmt_for_offsetof(funcname, &gsi);
for (unsigned i = 0; i < gimple_num_ops(stmt); ++i) {
tree op = gimple_op(stmt, i);
scan_tree_for_components(op, funcname, &gsi);
}
for (unsigned i = 0; i < gimple_num_ops(stmt); ++i) {
tree op = gimple_op(stmt, i);
scan_tree_for_components(op, funcname, &gsi);
}
*/
Build GimpleStatementPattern tree from individual gimple statement
Add GimpleStatementPattern to LocationPattern (attached at matching variable names (potentially unnamed ssa))
Patterns include markers for member offsets (type, member, value)
Later load a set of RTLInstructionPattern to match the patterns
*/
switch (stmt_code) {
case GIMPLE_CALL:
// check for offsetof, then fall through to operand scanning
case GIMPLE_ASSIGN:
case GIMPLE_COND:
case GIMPLE_LABEL:
case GIMPLE_RETURN:
return 0;
default:
return 1;
}
switch (stmt_code) {
case GIMPLE_CALL:
// check for offsetof, then fall through to operand scanning
case GIMPLE_ASSIGN:
case GIMPLE_COND:
case GIMPLE_LABEL:
case GIMPLE_RETURN:
return 0;
default:
return 1;
}
return 0;
return 0;
}
void clean_unnecessary_patterns() {
// TODO
// TODO -> erase all that do not contain a single member offset
}
int register_rtl_instruction_pattern(rtx_insn* i) {