[ARC] Backport ix emitting TLS symbols.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-9-branch@273658 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog

@@ -1,3 +1,9 @@
+2019-07-22  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	Backport from mainline.
+	* config/arc/arc.c (prepare_move_operands): Always use an
+	intermediate register when storing a TLS symbols.
+
 2019-07-20  Richard Sandiford  <richard.sandiford@arm.com>
 
 	Backport from mainline

gcc/config/arc/arc.c

@@ -8951,7 +8951,7 @@ prepare_move_operands (rtx *operands, machine_mode mode)
   if (GET_CODE (operands[1]) == SYMBOL_REF)
     {
       enum tls_model model = SYMBOL_REF_TLS_MODEL (operands[1]);
-      if (MEM_P (operands[0]) && flag_pic)
+      if (MEM_P (operands[0]))
 	operands[1] = force_reg (mode, operands[1]);
       else if (model)
 	operands[1] = arc_legitimize_tls_address (operands[1], model);

gcc/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2019-07-22  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	Backport from mainline
+	* gcc.target/arc/tls-2.c: New test.
+	* gcc.target/arc/tls-3.c: Likewise.
+
 2019-07-20  Richard Sandiford  <richard.sandiford@arm.com>
 
 	Backport from mainline

gcc/testsuite/gcc.target/arc/tls-2.c

@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target tls } */
+/* { dg-skip-if "" { arc*-*-elf* } } */
+/* { dg-options "-O2" } */
+
+typedef int type_a;
+__thread int b;
+int c;
+
+extern int bar (char *, int, int *, int, int *, char, type_a, int *, int *);
+int foo (int *f, char buffer, type_a buflen, int *g)
+{
+  bar("", c, (int *)foo, 1, (int *)f, buffer, buflen, (int *)g, &b);
+}

gcc/testsuite/gcc.target/arc/tls-3.c

@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target tls } */
+/* { dg-skip-if "" { arc*-*-elf* } } */
+/* { dg-options "-Os -fPIC" } */
+
+
+typedef struct
+{
+  int(a);
+  char b[];
+} type_c;
+
+
+extern int bar (char *, int, char *);
+static _Thread_local type_c d;
+int foo(void)
+{
+  bar(d.b, 0,  d.b);
+}