From: Richard Biener <rguenther@suse.de>
Date: Mon, 11 Oct 2021 12:31:59 +0000 (+0200)
Subject: middle-end/102683 - fix .DEFERRED_INIT expansion
X-Git-Tag: basepoints/gcc-13~3993
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=338725652f84793805c55f08a7607c2f45d5512b;p=thirdparty%2Fgcc.git

middle-end/102683 - fix .DEFERRED_INIT expansion

This avoids using an integer type for which we don't have an
approprate mode when expanding .DEFERRED_INIT to a non-memory
entity.

2021-10-11  Richard Biener  <rguenther@suse.de>

	PR middle-end/102683
	* internal-fn.c (expand_DEFERRED_INIT): Check for mode
	availability before building an integer type for storage
	purposes.
---

diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c
index 6bc256832f7d..b3638192fb90 100644
--- a/gcc/internal-fn.c
+++ b/gcc/internal-fn.c
@@ -3074,7 +3074,9 @@ expand_DEFERRED_INIT (internal_fn, gcall *stmt)
       tree init;
       if (tree_fits_uhwi_p (var_size)
 	  && (init_type == AUTO_INIT_PATTERN
-	      || !is_gimple_reg_type (var_type)))
+	      || !is_gimple_reg_type (var_type))
+	  && int_mode_for_size (tree_to_uhwi (var_size) * BITS_PER_UNIT,
+				0).exists ())
 	{
 	  unsigned HOST_WIDE_INT total_bytes = tree_to_uhwi (var_size);
 	  unsigned char *buf = (unsigned char *) xmalloc (total_bytes);