@@ -7545,6 +7545,18 @@ ix86_promote_function_mode (const_tree type,
enum machine_mode mode,
for_return);
}
+/* Return true if a structure, union or array with MODE containing FIELD
+ should be accessed using BLKmode. */
+
+static bool
+ix86_member_type_forces_blk (const_tree field, enum machine_mode mode)
+{
+ /* Union with XFmode must be in BLKmode. */
+ return (mode == XFmode
+ && (TREE_CODE (DECL_FIELD_CONTEXT (field)) == UNION_TYPE
+ || TREE_CODE (DECL_FIELD_CONTEXT (field)) == QUAL_UNION_TYPE));
+}
+
rtx
ix86_libcall_value (enum machine_mode mode)
{
@@ -40725,6 +40737,9 @@ ix86_memmodel_check (unsigned HOST_WIDE_INT val)
#undef TARGET_PROMOTE_FUNCTION_MODE
#define TARGET_PROMOTE_FUNCTION_MODE ix86_promote_function_mode
+#undef TARGET_MEMBER_TYPE_FORCES_BLK
+#define TARGET_MEMBER_TYPE_FORCES_BLK ix86_member_type_forces_blk
+
#undef TARGET_SECONDARY_RELOAD
#define TARGET_SECONDARY_RELOAD ix86_secondary_reload
@@ -1816,6 +1816,10 @@ do { \
#define BRANCH_COST(speed_p, predictable_p) \
(!(speed_p) ? 2 : (predictable_p) ? 0 : ix86_branch_cost)
+/* An integer expression for the size in bits of the largest integer machine
+ mode that should actually be used. We allow pairs of registers. */
+#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TARGET_64BIT ? TImode : DImode)
+
/* Define this macro as a C expression which is nonzero if accessing
less than a word of memory (i.e. a `char' or a `short') is no
faster than accessing a word of memory, i.e., if such access
b/gcc/testsuite/gcc.target/i386/pr20020-1.c
new file mode 100644
@@ -0,0 +1,26 @@
+/* Check that 128-bit struct's are represented as TImode values. */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-O2 -fdump-rtl-expand" } */
+
+struct shared_ptr_struct
+{
+ unsigned long long phase:48;
+ unsigned short thread:16;
+ union
+ {
+ void *addr;
+ unsigned long long pad;
+ };
+};
+typedef struct shared_ptr_struct sptr_t;
+
+sptr_t S;
+
+sptr_t
+sptr_result (void)
+{
+ return S;
+}
+/* { dg-final { scan-rtl-dump "\\\(set \\\(reg:TI \[0-9\]* \\\[
<retval> \\\]\\\)" "expand" } } */
+/* { dg-final { scan-rtl-dump "\\\(set \\\(reg/i:TI 0 ax\\\)" "expand" } } */
+/* { dg-final { cleanup-rtl-dump "expand" } } */
b/gcc/testsuite/gcc.target/i386/pr20020-2.c
new file mode 100644
@@ -0,0 +1,24 @@
+/* Check that 128-bit struct's are represented as TImode values. */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-O2 -fdump-rtl-expand" } */
+
+struct shared_ptr_struct
+{
+ unsigned long long phase:48;
+ unsigned short thread:16;
+ union
+ {
+ void *addr;
+ unsigned long long pad;
+ };
+};
+typedef struct shared_ptr_struct sptr_t;
+
+void
+copy_sptr (sptr_t *dest, sptr_t src)
+{
+ *dest = src;
+}
+
+/* { dg-final { scan-rtl-dump "\\\(set \\\(reg:TI \[0-9\]*" "expand" } } */
+/* { dg-final { cleanup-rtl-dump "expand" } } */
b/gcc/testsuite/gcc.target/i386/pr20020-3.c
new file mode 100644
@@ -0,0 +1,27 @@
+/* Check that 128-bit struct's are represented as TImode values. */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-O2 -fdump-rtl-expand" } */
+
+struct shared_ptr_struct
+{
+ unsigned long long phase:48;
+ unsigned short thread:16;
+ union
+ {
+ void *addr;
+ unsigned long long pad;
+ };
+};
+typedef struct shared_ptr_struct sptr_t;
+
+sptr_t sptr_1, sptr_2;
+
+void
+copy_sptr (void)
+{
+ sptr_1 = sptr_2;
+}
+
+/* { dg-final { scan-rtl-dump "\\\(set \\\(reg:TI \[0-9\]*" "expand" } } */
+/* { dg-final { scan-rtl-dump "\\\(set \\\(mem/c:TI" "expand" } } */
+/* { dg-final { cleanup-rtl-dump "expand" } } */