From: Richard Biener <rguenther@suse.de>
Date: Mon, 4 Dec 2023 12:31:35 +0000 (+0100)
Subject: c/86869 - preserve address-space info when building qualified ARRAY_TYPE
X-Git-Tag: basepoints/gcc-15~4006
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e00c00730912cd6072954cd2c29ca44e33dbb598;p=thirdparty%2Fgcc.git

c/86869 - preserve address-space info when building qualified ARRAY_TYPE

The following adjusts the C FE specific qualified type building
to preserve address-space info also for ARRAY_TYPE.

	PR c/86869
gcc/c/
	* c-typeck.cc (c_build_qualified_type): Preserve address-space
	info for ARRAY_TYPE.

gcc/testsuite/
	* gcc.target/avr/pr86869.c: New testcase.
---

diff --git a/gcc/c/c-typeck.cc b/gcc/c/c-typeck.cc
index a6edbc85f109..836893905fa0 100644
--- a/gcc/c/c-typeck.cc
+++ b/gcc/c/c-typeck.cc
@@ -16263,6 +16263,7 @@ c_build_qualified_type (tree type, int type_quals, tree orig_qual_type,
 
 	  t = build_variant_type_copy (type);
 	  TREE_TYPE (t) = element_type;
+	  TYPE_ADDR_SPACE (t) = TYPE_ADDR_SPACE (element_type);
 
           if (TYPE_STRUCTURAL_EQUALITY_P (element_type)
               || (domain && TYPE_STRUCTURAL_EQUALITY_P (domain)))
diff --git a/gcc/testsuite/gcc.target/avr/pr86869.c b/gcc/testsuite/gcc.target/avr/pr86869.c
new file mode 100644
index 000000000000..fbfb378e8c90
--- /dev/null
+++ b/gcc/testsuite/gcc.target/avr/pr86869.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+
+struct S {
+  char y[2];
+};
+
+void foo(const __memx  struct S *s) {
+  const char (*p)[2] = &s->y;
+}