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Add initial support for 'goto' statements.

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ispc now supports goto, but only under uniform control flow--i.e.
it must be possible for the compiler to statically determine that
all program instances will follow the goto.  An error is issued at
compile time if a goto is used when this is not the case.
This commit is contained in:
Matt Pharr
2012-01-05 12:20:44 -08:00
parent 48e9d4af39
commit 78c6d3c02f
20 changed files with 408 additions and 15 deletions
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9
ast.cpp
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@@ -91,6 +91,7 @@ WalkAST(ASTNode *node, ASTPreCallBackFunc preFunc, ASTPostCallBackFunc postFunc,
ForStmt *fs;
ForeachStmt *fes;
ReturnStmt *rs;
LabeledStmt *ls;
StmtList *sl;
PrintStmt *ps;
AssertStmt *as;
@@ -131,9 +132,12 @@ WalkAST(ASTNode *node, ASTPreCallBackFunc preFunc, ASTPostCallBackFunc postFunc,
fes->stmts = (Stmt *)WalkAST(fes->stmts, preFunc, postFunc, data);
}
else if (dynamic_cast<BreakStmt *>(node) != NULL ||
dynamic_cast<ContinueStmt *>(node) != NULL) {
// nothing
dynamic_cast<ContinueStmt *>(node) != NULL ||
dynamic_cast<GotoStmt *>(node) != NULL) {
// nothing
}
else if ((ls = dynamic_cast<LabeledStmt *>(node)) != NULL)
ls->stmt = (Stmt *)WalkAST(ls->stmt, preFunc, postFunc, data);
else if ((rs = dynamic_cast<ReturnStmt *>(node)) != NULL)
rs->val = (Expr *)WalkAST(rs->val, preFunc, postFunc, data);
else if ((sl = dynamic_cast<StmtList *>(node)) != NULL) {
@@ -289,3 +293,4 @@ EstimateCost(ASTNode *root) {
WalkAST(root, lCostCallback, NULL, &cost);
return cost;
}