* [PATCH][GCC11] tree-optimization/99121 - avoid ICEing for non-constant sizes
@ 2022-04-07 10:01 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2022-04-07 10:01 UTC (permalink / raw)
To: gcc-patches
The following is a simple fix to avoid ICEing on non-constant
sizes of ARRAY_REFs instead of backporting too intrusive changes
done on trunk.
Bootstrap / regtest pending on x86_64-unknown-linux-gnu.
2022-04-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/99121
* gimple-array-bounds.cc (array_bounds_checker::check_mem_ref):
Bail out for non-constant type size.
---
gcc/gimple-array-bounds.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/gimple-array-bounds.cc b/gcc/gimple-array-bounds.cc
index 199d9f5d216..b1179518651 100644
--- a/gcc/gimple-array-bounds.cc
+++ b/gcc/gimple-array-bounds.cc
@@ -607,6 +607,8 @@ array_bounds_checker::check_mem_ref (location_t location, tree ref,
if (TREE_CODE (reftype) == ARRAY_TYPE)
{
+ if (TREE_CODE (TYPE_SIZE_UNIT (TREE_TYPE (reftype))) != INTEGER_CST)
+ return false;
/* Set to the size of the array element (and adjust below). */
eltsize = wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (reftype)));
/* Use log2 of size to convert the array byte size in to its
--
2.34.1
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2022-04-07 10:01 [PATCH][GCC11] tree-optimization/99121 - avoid ICEing for non-constant sizes Richard Biener
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