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refactor some code into a local class.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96334 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-02-16 06:52:01 +00:00
parent e2de49d9a1
commit e02ea54cfd
1 changed files with 22 additions and 14 deletions
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36
utils/TableGen/DAGISelMatcherEmitter.cpp
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@ -24,10 +24,6 @@ enum {
}; };
} }
static unsigned EmitMatcherAndChildren(const MatcherNode *N,
formatted_raw_ostream &FOS,
unsigned Indent);
/// ClassifyInt - Classify an integer by size, return '1','2','4','8' if this /// ClassifyInt - Classify an integer by size, return '1','2','4','8' if this
/// fits in 1, 2, 4, or 8 sign extended bytes. /// fits in 1, 2, 4, or 8 sign extended bytes.
static char ClassifyInt(int64_t Val) { static char ClassifyInt(int64_t Val) {
@ -67,10 +63,22 @@ static unsigned EmitInt(int64_t Val, formatted_raw_ostream &OS) {
return BytesEmitted; return BytesEmitted;
} }
namespace {
class MatcherTableEmitter {
formatted_raw_ostream &OS;
public:
MatcherTableEmitter(formatted_raw_ostream &os) : OS(os) {}
unsigned EmitMatcherAndChildren(const MatcherNode *N, unsigned Indent);
private:
unsigned EmitMatcher(const MatcherNode *N, unsigned Indent);
};
} // end anonymous namespace.
/// EmitMatcherOpcodes - Emit bytes for the specified matcher and return /// EmitMatcherOpcodes - Emit bytes for the specified matcher and return
/// the number of bytes emitted. /// the number of bytes emitted.
static unsigned EmitMatcher(const MatcherNode *N, formatted_raw_ostream &OS, unsigned MatcherTableEmitter::
unsigned Indent) { EmitMatcher(const MatcherNode *N, unsigned Indent) {
OS.PadToColumn(Indent*2); OS.PadToColumn(Indent*2);
switch (N->getKind()) { switch (N->getKind()) {
@ -163,9 +171,8 @@ static unsigned EmitMatcher(const MatcherNode *N, formatted_raw_ostream &OS,
} }
/// EmitMatcherAndChildren - Emit the bytes for the specified matcher subtree. /// EmitMatcherAndChildren - Emit the bytes for the specified matcher subtree.
static unsigned EmitMatcherAndChildren(const MatcherNode *N, unsigned MatcherTableEmitter::
formatted_raw_ostream &OS, EmitMatcherAndChildren(const MatcherNode *N, unsigned Indent) {
unsigned Indent) {
unsigned Size = 0; unsigned Size = 0;
while (1) { while (1) {
// Push is a special case since it is binary. // Push is a special case since it is binary.
@ -179,8 +186,7 @@ static unsigned EmitMatcherAndChildren(const MatcherNode *N,
raw_svector_ostream OS(TmpBuf); raw_svector_ostream OS(TmpBuf);
formatted_raw_ostream FOS(OS); formatted_raw_ostream FOS(OS);
ChildSize = ChildSize =
EmitMatcherAndChildren(cast<PushMatcherNode>(N)->getChild(), FOS, EmitMatcherAndChildren(cast<PushMatcherNode>(N)->getChild(),Indent+1);
Indent+1);
} }
if (ChildSize > 255) { if (ChildSize > 255) {
@ -199,7 +205,7 @@ static unsigned EmitMatcherAndChildren(const MatcherNode *N,
continue; continue;
} }
Size += EmitMatcher(N, OS, Indent); Size += EmitMatcher(N, Indent);
// If there are children of this node, iterate to them, otherwise we're // If there are children of this node, iterate to them, otherwise we're
// done. // done.
@ -216,8 +222,10 @@ void llvm::EmitMatcherTable(const MatcherNode *Matcher, raw_ostream &O) {
OS << "// The main instruction selector code.\n"; OS << "// The main instruction selector code.\n";
OS << "SDNode *SelectCode2(SDNode *N) {\n"; OS << "SDNode *SelectCode2(SDNode *N) {\n";
MatcherTableEmitter MatcherEmitter(OS);
OS << " static const unsigned char MatcherTable[] = {\n"; OS << " static const unsigned char MatcherTable[] = {\n";
unsigned TotalSize = EmitMatcherAndChildren(Matcher, OS, 2); unsigned TotalSize = MatcherEmitter.EmitMatcherAndChildren(Matcher, 2);
OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n"; OS << " 0\n }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
OS << " return SelectCodeCommon(N, MatcherTable, sizeof(MatcherTable));\n}\n"; OS << " return SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n}\n";
} }