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* [gcc r12-8432] pointer-query: Fix ICE with non-pointer param [PR105635]
@ 2022-05-30 3:36 Jakub Jelinek
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From: Jakub Jelinek @ 2022-05-30 3:36 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:7b88f9b8881b7653b5a834da1b2b8fda463e61c0
commit r12-8432-g7b88f9b8881b7653b5a834da1b2b8fda463e61c0
Author: Jakub Jelinek <jakub@redhat.com>
Date: Thu May 19 11:56:21 2022 +0200
pointer-query: Fix ICE with non-pointer param [PR105635]
The gimple_parm_array_size function comment talks about pointe parameters
but doesn't actually verify it, it checks whether an attribute is present
on the function and then just uses TREE_TYPE (TREE_TYPE (var)) which
assumes a pointer type (or in theory could work for ARRAY_TYPE but
c-family languages which only have that attribute will never have ARRAY_TYPE
parameters; and for VECTOR_TYPE/COMPLEX_TYPE it would mean something quite
different).
So, this patch punts early if var doesn't have pointer/reference type.
2022-05-19 Jakub Jelinek <jakub@redhat.com>
PR c/105635
* pointer-query.cc (gimple_parm_array_size): Return NULL if var
doesn't have pointer or reference type.
* gcc.dg/pr105635.c: New test.
(cherry picked from commit 3b4daa0b3c3d8eb2ac3b40ad6898f314ed4d7919)
Diff:
---
gcc/pointer-query.cc | 2 +-
gcc/testsuite/gcc.dg/pr105635.c | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/gcc/pointer-query.cc b/gcc/pointer-query.cc
index d93657f3206..b133e7cad14 100644
--- a/gcc/pointer-query.cc
+++ b/gcc/pointer-query.cc
@@ -554,7 +554,7 @@ gimple_parm_array_size (tree ptr, wide_int rng[2],
from the current function declaratation (e.g., attribute access or
related). */
tree var = SSA_NAME_VAR (ptr);
- if (TREE_CODE (var) != PARM_DECL)
+ if (TREE_CODE (var) != PARM_DECL || !POINTER_TYPE_P (TREE_TYPE (var)))
return NULL_TREE;
const unsigned prec = TYPE_PRECISION (sizetype);
diff --git a/gcc/testsuite/gcc.dg/pr105635.c b/gcc/testsuite/gcc.dg/pr105635.c
new file mode 100644
index 00000000000..aa02f593bfa
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr105635.c
@@ -0,0 +1,11 @@
+/* PR c/105635 */
+/* { dg-do compile } */
+/* { dg-options "-Wall" } */
+
+void foo (int, int[*]); /* { dg-message "previous declaration of 'foo' with type" } */
+
+foo (int x, int y) /* { dg-warning "return type defaults to 'int'" } */
+{ /* { dg-warning "conflicting types for 'foo'" "" { target *-*-* } .-1 } */
+ /* { dg-message "declared here" "" { target *-*-* } .-2 } */
+ return (x >= 0) != (y < 0); /* { dg-warning "'return' with a value, in function returning void" } */
+}
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