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From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: linux-sparse@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: [PATCH 3/5] unqual: comma expressions should drop qualifiers
Date: Wed, 18 Nov 2020 22:11:45 +0100	[thread overview]
Message-ID: <20201118211147.10680-4-luc.vanoostenryck@gmail.com> (raw)
In-Reply-To: <20201118211147.10680-1-luc.vanoostenryck@gmail.com>

Comma expressions should be subjected to lvalue-conversion
and thus should drop qualifiers.

Fix this by calling unqualify_type() after array-to-pointer
conversion.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 evaluate.c                     | 2 +-
 validation/eval/unqual-comma.c | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/evaluate.c b/evaluate.c
index fd84205c7f2c..b6e8477185f4 100644
--- a/evaluate.c
+++ b/evaluate.c
@@ -1028,7 +1028,7 @@ static struct symbol *evaluate_binop(struct expression *expr)
 
 static struct symbol *evaluate_comma(struct expression *expr)
 {
-	expr->ctype = degenerate(expr->right);
+	expr->ctype = unqualify_type(degenerate(expr->right));
 	if (expr->ctype == &null_ctype)
 		expr->ctype = &ptr_ctype;
 	expr->flags &= expr->left->flags & expr->right->flags;
diff --git a/validation/eval/unqual-comma.c b/validation/eval/unqual-comma.c
index e06586cd43e3..11546d22348a 100644
--- a/validation/eval/unqual-comma.c
+++ b/validation/eval/unqual-comma.c
@@ -9,5 +9,4 @@ int *foo(volatile int x)
 
 /*
  * check-name: unqual-comma
- * check-known-to-fail
  */
-- 
2.29.2


  parent reply	other threads:[~2020-11-18 21:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-18 21:11 [PATCH 0/5] fix qualifier dropping Luc Van Oostenryck
2020-11-18 21:11 ` [PATCH 1/5] unqual: add testcases Luc Van Oostenryck
2020-11-18 21:11 ` [PATCH 2/5] unqual: unqualify_type() should check for null ctypes Luc Van Oostenryck
2020-11-18 21:11 ` Luc Van Oostenryck [this message]
2020-11-18 21:11 ` [PATCH 4/5] unqual: statement expressions should drop qualifiers Luc Van Oostenryck
2020-11-18 21:11 ` [PATCH 5/5] unqual: pre- & post-increment/decrement should *not* " Luc Van Oostenryck

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