* [PATCH] tree-optimization/105232 - handle overly large sizes in component_ref_size
@ 2022-04-12 8:53 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2022-04-12 8:53 UTC (permalink / raw)
To: gcc-patches
The following properly checks tree_fits_poly_int64_p before converting
a size to a poly_int64.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
2022-04-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/105232
* tree.cc (component_ref_size): Bail out for too large
or non-constant sizes.
---
gcc/tree.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/tree.cc b/gcc/tree.cc
index 8f83ea1aae3..609f0b4569a 100644
--- a/gcc/tree.cc
+++ b/gcc/tree.cc
@@ -12961,6 +12961,8 @@ component_ref_size (tree ref, special_array_member *sam /* = NULL */)
to struct types with flexible array members. */
if (memsize)
{
+ if (!tree_fits_poly_int64_p (memsize))
+ return NULL_TREE;
poly_int64 memsz64 = memsize ? tree_to_poly_int64 (memsize) : 0;
if (known_lt (baseoff, memsz64))
{
--
2.34.1
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