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c-decl.c (finish_function): Warn about a non-void function with no return statement and no abnormal exit.

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* c-decl.c (finish_function): Warn about a non-void function with
        no return statement and no abnormal exit.
        (current_function_returns_abnormally): New variable.
        (start_function): Clear it.
        (struct c_language_function): Add returns_abnormally.
        (push_c_function_context): Save it.
        (pop_c_function_context): Restore it.
        (builtin_function): Set TREE_THIS_VOLATILE on return fns.
        (grokdeclarator): Set C_FUNCTION_IMPLICIT_INT on functions without
        an explicit return type.
        * c-tree.h: Declare current_function_returns_abnormally.
        (C_FUNCTION_IMPLICIT_INT): New macro.
        * c-typeck.c (build_function_call): Set it.
        (c_expand_return): Set current_function_returns_value even if the
        value is erroneous.

From-SVN: r49579
This commit is contained in:
Jason Merrill 2002-02-07 07:36:46 -05:00
parent a6f3addd0b
commit 3adb9cb9af
1 changed files with 7 additions and 0 deletions
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7
gcc/testsuite/gcc.dg/Wreturn-type2.c Normal file
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/* Test for cases that should not get the unconditional warning about
missing return. */
/* { dg-do compile } */
f() {} /* { dg-bogus "" "no return warning" } */
int g() { abort (); } /* { dg-bogus "" "no return warning" } */
int main() {} /* { dg-bogus "" "no return warning" } */