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function.c (uninitialized_vars_warning): Do not warn for a VAR_DECL if it has a nonzero DECL_INITIAL.

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* function.c (uninitialized_vars_warning): Do not warn for a VAR_DECL
        if it has a nonzero DECL_INITIAL.

From-SVN: r23164
This commit is contained in:
Jeffrey A Law 1998-10-18 16:34:41 +00:00 committed by Jeff Law
parent 39ee4d93e6
commit 6acdd0fd75
2 changed files with 13 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
Sun Oct 18 17:31:26 1998 Jeffrey A Law (law@cygnus.com)
* function.c (uninitialized_vars_warning): Do not warn for a VAR_DECL
if it has a nonzero DECL_INITIAL.
Sat Oct 17 23:18:08 1998 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* Makefile.in (flow.o): Depend on recog.h.

8
gcc/function.c
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@ -4907,6 +4907,14 @@ uninitialized_vars_warning (block)
&& ! AGGREGATE_TYPE_P (TREE_TYPE (decl))
&& DECL_RTL (decl) != 0
&& GET_CODE (DECL_RTL (decl)) == REG
/* Global optimizations can make it difficult to determine if a
particular variable has been initialized. However, a VAR_DECL
with a nonzero DECL_INITIAL had an initializer, so do not
claim it is potentially uninitialized.
We do not care about the actual value in DECL_INITIAL, so we do
not worry that it may be a dangling pointer. */
&& DECL_INITIAL (decl) == NULL_TREE
&& regno_uninitialized (REGNO (DECL_RTL (decl))))
warning_with_decl (decl,
"`%s' might be used uninitialized in this function");