diff options
Diffstat (limited to 'gcc/gimplify.c')
| -rw-r--r-- | gcc/gimplify.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/gcc/gimplify.c b/gcc/gimplify.c index 6ee49b6..6a9e3b1 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -1744,9 +1744,25 @@ gimplify_call_expr (tree *expr_p, tree *pre_p, bool want_value) } if (DECL_FUNCTION_CODE (decl) == BUILT_IN_VA_START) - /* Avoid gimplifying the second argument to va_start, which needs - to be the plain PARM_DECL. */ - return gimplify_arg (&TREE_VALUE (TREE_OPERAND (*expr_p, 1)), pre_p); + { + tree arglist = TREE_OPERAND (*expr_p, 1); + + if (!arglist || !TREE_CHAIN (arglist)) + { + error ("too few arguments to function %<va_start%>"); + *expr_p = build_empty_stmt (); + return GS_OK; + } + + if (fold_builtin_next_arg (TREE_CHAIN (arglist))) + { + *expr_p = build_empty_stmt (); + return GS_OK; + } + /* Avoid gimplifying the second argument to va_start, which needs + to be the plain PARM_DECL. */ + return gimplify_arg (&TREE_VALUE (TREE_OPERAND (*expr_p, 1)), pre_p); + } } /* There is a sequence point before the call, so any side effects in |