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rearrange default jump for slightly better code generation

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This commit is contained in:
Bill Currie 2001-11-13 20:27:05 +00:00
parent 7888f1cb93
commit 645c400802
1 changed files with 9 additions and 4 deletions
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13
tools/qfcc/source/switch.c
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@ -232,8 +232,14 @@ build_switch (expr_t *sw, case_node_t *tree, int op, expr_t *sw_val,
expr_t *high_label = default_label;
expr_t *low_label = default_label;
if (!tree)
if (!tree) {
branch = new_unary_expr ('g', default_label);
branch->line = sw_val->line;
branch->file = sw_val->file;
append_expr (sw, branch);
temp->e.temp.users--;
return;
}
if (tree->right) {
high_label = new_label_expr ();
@ -271,8 +277,7 @@ build_switch (expr_t *sw, case_node_t *tree, int op, expr_t *sw_val,
if (tree->right)
append_expr (sw, high_label);
}
if (tree->right)
build_switch (sw, tree->right, op, sw_val, temp, default_label);
build_switch (sw, tree->right, op, sw_val, temp, default_label);
} else {
expr_t *utemp = new_temp_def_expr (&type_uinteger);
int low = tree->low->e.integer_val;
@ -375,6 +380,7 @@ switch_expr (switch_block_t *switch_block, expr_t *break_label,
test->file = cmp->file = sw_val->file;
append_expr (sw, test);
}
append_expr (sw, default_expr);
} else {
expr_t *temp;
int op;
@ -401,7 +407,6 @@ switch_expr (switch_block_t *switch_block, expr_t *break_label,
}
build_switch (sw, case_tree, op, sw_val, temp, default_label->label);
}
append_expr (sw, default_expr);
append_expr (sw, statements);
append_expr (sw, break_label);
return sw;