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| author | Per Bothner <per@bothner.com> | 2001-10-11 16:34:03 -0700 |
|---|---|---|
| committer | Per Bothner <bothner@gcc.gnu.org> | 2001-10-11 16:34:03 -0700 |
| commit | be98560f314f6940b262501fca7ffdd99b223b04 (patch) | |
| tree | 01bd063c25f7f684651a3ab1070967f70d165aa8 /gcc/java | |
| parent | cfac6e9fb4ea2fc7b05ded85c805501e4d7700b9 (diff) | |
| download | gcc-be98560f314f6940b262501fca7ffdd99b223b04.zip gcc-be98560f314f6940b262501fca7ffdd99b223b04.tar.gz gcc-be98560f314f6940b262501fca7ffdd99b223b04.tar.bz2 | |
parse.y (patch_if_else_statement): If the condition is constant, optimize away the test.
* parse.y (patch_if_else_statement): If the condition is constant,
optimize away the test.
From-SVN: r46207
Diffstat (limited to 'gcc/java')
| -rw-r--r-- | gcc/java/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/java/parse.y | 20 |
2 files changed, 22 insertions, 3 deletions
diff --git a/gcc/java/ChangeLog b/gcc/java/ChangeLog index 0c9c077..634bdc3 100644 --- a/gcc/java/ChangeLog +++ b/gcc/java/ChangeLog @@ -1,3 +1,8 @@ +2001-10-11 Per Bothner <per@bothner.com> + + * parse.y (patch_if_else_statement): If the condition is constant, + optimize away the test. + 2001-10-09 Alexandre Petit-Bianco <apbianco@redhat.com> * parse.y (patch_cast): Call patch_string on the first operand of diff --git a/gcc/java/parse.y b/gcc/java/parse.y index d007b71..a5c9867 100644 --- a/gcc/java/parse.y +++ b/gcc/java/parse.y @@ -15016,6 +15016,9 @@ patch_if_else_statement (node) tree node; { tree expression = TREE_OPERAND (node, 0); + int can_complete_normally + = (CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1)) + | CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 2))); TREE_TYPE (node) = error_mark_node; EXPR_WFL_LINECOL (wfl_operator) = EXPR_WFL_LINECOL (node); @@ -15031,11 +15034,22 @@ patch_if_else_statement (node) return error_mark_node; } + if (TREE_CODE (expression) == INTEGER_CST) + { + if (integer_zerop (expression)) + node = TREE_OPERAND (node, 2); + else + node = TREE_OPERAND (node, 1); + if (CAN_COMPLETE_NORMALLY (node) != can_complete_normally) + { + node = build (COMPOUND_EXPR, void_type_node, node, empty_stmt_node); + CAN_COMPLETE_NORMALLY (node) = can_complete_normally; + } + return node; + } TREE_TYPE (node) = void_type_node; TREE_SIDE_EFFECTS (node) = 1; - CAN_COMPLETE_NORMALLY (node) - = CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 1)) - | CAN_COMPLETE_NORMALLY (TREE_OPERAND (node, 2)); + CAN_COMPLETE_NORMALLY (node) = can_complete_normally; return node; } |