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From-SVN: r66764
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Jason Merrill 2003-05-13 12:56:00 -04:00
parent 3a0d67cf82
commit ec86c71f91
1 changed files with 3 additions and 11 deletions
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gcc/tree.def
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@ -31,7 +31,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
'<' for codes for comparison expressions. '<' for codes for comparison expressions.
'1' for codes for unary arithmetic expressions. '1' for codes for unary arithmetic expressions.
'2' for codes for binary arithmetic expressions. '2' for codes for binary arithmetic expressions.
's' for codes for expressions with inherent side effects. 's' for codes for "statement" expressions, which have side-effects,
but usually no interesting value.
'e' for codes for other kinds of expressions. */ 'e' for codes for other kinds of expressions. */
/* For `r', `e', `<', `1', `2', and `s' nodes, which use struct /* For `r', `e', `<', `1', `2', and `s' nodes, which use struct
@ -780,16 +781,7 @@ DEFTREECODE (TRY_CATCH_EXPR, "try_catch_expr", 'e', 2)
/* Evaluate the first operand. /* Evaluate the first operand.
The second operand is a cleanup expression which is evaluated The second operand is a cleanup expression which is evaluated
before an exit (normal, exception, or jump out) from this expression. on any exit (normal, exception, or jump out) from this expression. */
Like a CLEANUP_POINT_EXPR/WITH_CLEANUP_EXPR combination, but those
always copy the cleanup expression where needed. In contrast,
TRY_FINALLY_EXPR generates a jump to a cleanup subroutine.
(At least conceptually; the optimizer could inline the cleanup
subroutine in the same way it could inline normal subroutines.)
TRY_FINALLY_EXPR should be used when the cleanup is actual statements
in the source of the current function (which people might want to
set breakpoints in). */
DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", 'e', 2) DEFTREECODE (TRY_FINALLY_EXPR, "try_finally", 'e', 2)
/* Used internally for cleanups in the implementation of TRY_FINALLY_EXPR. /* Used internally for cleanups in the implementation of TRY_FINALLY_EXPR.