Hi, PR103033 (c-c++-common/auto-init-4.c ICEs starting with r12-4829)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103033 Is an -ftrivial-auto-var-init bug exposed on Powerpc64-linux only. For the following code in gcc/internal-fn.c: 3085 if (can_native_interpret_type_p (var_type)) 3086 init = native_interpret_expr (var_type, buf, total_bytes); ... 3105 expand_assignment (lhs, init, false); there is an inconsistency between "can_native_interpret_type_p" and "native_interpret_expr" for "long double" on Powerpcle: although "can_native_interpre_type_p(long double)" return true, "native_interpret_expr (long double, buf,...) return NULL on Powerpcle Due to the fix for PR95450. Therefore, we should expect that “native_interpret_expr” might return NULL, and under such situation, fall though to the more conservative path to generate “init” The fix is very simple, and bootstrapped on x86, aarch64, and powerpc. Regression testing are ongoing. Okay for trunk? Qing ===== From 22cf4fee8cf4b050ab41a3de074db70359421b23 Mon Sep 17 00:00:00 2001 From: Qing Zhao <qing.z...@oracle.com> Date: Tue, 2 Nov 2021 22:28:13 +0000 Subject: [PATCH] PR 103033 (c-c++-common/auto-init-4.c ICEs starting with r12-4829) Fall through more conservative path to generate patten when native_interpret_expr return NULL. gcc/ChangeLog: 2021-11-02 qing zhao <qing.z...@oracle.com> * internal-fn.c (expand_DEFERRED_INIT): Handle the case when native_interpret_expr return NULL. --- gcc/internal-fn.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c index fd6cb0995d9..0d056fdceea 100644 --- a/gcc/internal-fn.c +++ b/gcc/internal-fn.c @@ -3082,9 +3082,8 @@ expand_DEFERRED_INIT (internal_fn, gcall *stmt) unsigned char *buf = (unsigned char *) xmalloc (total_bytes); memset (buf, (init_type == AUTO_INIT_PATTERN ? INIT_PATTERN_VALUE : 0), total_bytes); - if (can_native_interpret_type_p (var_type)) - init = native_interpret_expr (var_type, buf, total_bytes); - else + if (!(can_native_interpret_type_p (var_type) + && (init = native_interpret_expr (var_type, buf, total_bytes)))) { tree itype = build_nonstandard_integer_type (total_bytes * BITS_PER_UNIT, 1); -- 2.27.0
