re PR target/80162 (ICE on invalid code (address of register variable))

	PR middle-end/80162
c-family/
	* c-common.c (c_common_mark_addressable_vec): Don't set
	TREE_ADDRESSABLE on DECL_HARD_REGISTER.
c/
	* c-tree.h (c_mark_addressable): Add array_ref_p argument.
	* c-typeck.c (c_mark_addressable): Likewise.  Look through
	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
	to ARRAY_TYPE.
	(build_array_ref): Pass true as array_ref_p to c_mark_addressable.
cp/
	* cp-tree.h (cxx_mark_addressable): Add array_ref_p argument.
	* typeck.c (cxx_mark_addressable): Likewise.  Look through
	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
	to ARRAY_TYPE.
	(cp_build_array_ref): Pass true as array_ref_p to cxx_mark_addressable.
testsuite/
	* c-c++-common/pr80162-1.c: New test.
	* c-c++-common/pr80162-2.c: New test.
	* c-c++-common/pr80162-3.c: New test.

From-SVN: r246512

gcc/c-family/ChangeLog

+2017-03-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/80162
+	* c-common.c (c_common_mark_addressable_vec): Don't set
+	TREE_ADDRESSABLE on DECL_HARD_REGISTER.
+
 2017-03-21  Martin Sebor  <msebor@redhat.com>
 
 	PR c++/79548

gcc/c-family/c-common.c

@@ -6542,6 +6542,7 @@ c_common_mark_addressable_vec (tree t)
       && TREE_CODE (t) != PARM_DECL
       && TREE_CODE (t) != COMPOUND_LITERAL_EXPR)
     return;
+  if (!VAR_P (t) || !DECL_HARD_REGISTER (t))
     TREE_ADDRESSABLE (t) = 1;
 }
 

gcc/c/ChangeLog

+2017-03-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/80162
+	* c-tree.h (c_mark_addressable): Add array_ref_p argument.
+	* c-typeck.c (c_mark_addressable): Likewise.  Look through
+	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
+	to ARRAY_TYPE.
+	(build_array_ref): Pass true as array_ref_p to c_mark_addressable.
+
 2017-03-23  Marek Polacek  <polacek@redhat.com>
 
 	* c-tree.h: Remove a C_RID_YYCODE reference.

gcc/c/c-tree.h

@@ -615,7 +615,7 @@ extern int same_translation_unit_p (const_tree, const_tree);
 extern int comptypes (tree, tree);
 extern int comptypes_check_different_types (tree, tree, bool *);
 extern bool c_vla_type_p (const_tree);
-extern bool c_mark_addressable (tree);
+extern bool c_mark_addressable (tree, bool = false);
 extern void c_incomplete_type_error (location_t, const_tree, const_tree);
 extern tree c_type_promotes_to (tree);
 extern struct c_expr default_function_array_conversion (location_t,

gcc/c/c-typeck.c

@@ -2654,7 +2654,7 @@ build_array_ref (location_t loc, tree array, tree index)
 	  || (COMPLETE_TYPE_P (TREE_TYPE (TREE_TYPE (array)))
 	      && TREE_CODE (TYPE_SIZE (TREE_TYPE (TREE_TYPE (array)))) != INTEGER_CST))
 	{
-	  if (!c_mark_addressable (array))
+	  if (!c_mark_addressable (array, true))
 	    return error_mark_node;
 	}
       /* An array that is indexed by a constant value which is not within
@@ -4755,16 +4755,26 @@ lvalue_or_else (location_t loc, const_tree ref, enum lvalue_use use)
 
 /* Mark EXP saying that we need to be able to take the
    address of it; it should not be allocated in a register.
-   Returns true if successful.  */
+   Returns true if successful.  ARRAY_REF_P is true if this
+   is for ARRAY_REF construction - in that case we don't want
+   to look through VIEW_CONVERT_EXPR from VECTOR_TYPE to ARRAY_TYPE,
+   it is fine to use ARRAY_REFs for vector subscripts on vector
+   register variables.  */
 
 bool
-c_mark_addressable (tree exp)
+c_mark_addressable (tree exp, bool array_ref_p)
 {
   tree x = exp;
 
   while (1)
     switch (TREE_CODE (x))
       {
+      case VIEW_CONVERT_EXPR:
+	if (array_ref_p
+	    && TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE
+	    && VECTOR_TYPE_P (TREE_TYPE (TREE_OPERAND (x, 0))))
+	  return true;
+	/* FALLTHRU */
       case COMPONENT_REF:
       case ADDR_EXPR:
       case ARRAY_REF:

gcc/cp/ChangeLog

+2017-03-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/80162
+	* cp-tree.h (cxx_mark_addressable): Add array_ref_p argument.
+	* typeck.c (cxx_mark_addressable): Likewise.  Look through
+	VIEW_CONVERT_EXPR unless array_ref_p and VCE is from VECTOR_TYPE
+	to ARRAY_TYPE.
+	(cp_build_array_ref): Pass true as array_ref_p to cxx_mark_addressable.
+
 2017-03-24  Jason Merrill  <jason@redhat.com>
 
 	PR c++/77339 - ICE with invalid use of alias template.

gcc/cp/cp-tree.h

@@ -6715,7 +6715,7 @@ extern void cxx_print_error_function		(diagnostic_context *,
 						 struct diagnostic_info *);
 
 /* in typeck.c */
-extern bool cxx_mark_addressable		(tree);
+extern bool cxx_mark_addressable		(tree, bool = false);
 extern int string_conv_p			(const_tree, const_tree, int);
 extern tree cp_truthvalue_conversion		(tree);
 extern tree condition_conversion		(tree);

gcc/cp/typeck.c

@@ -3217,7 +3217,7 @@ cp_build_array_ref (location_t loc, tree array, tree idx,
 	      && (TREE_CODE (TYPE_SIZE (TREE_TYPE (TREE_TYPE (array))))
 		  != INTEGER_CST)))
 	{
-	  if (!cxx_mark_addressable (array))
+	  if (!cxx_mark_addressable (array, true))
 	    return error_mark_node;
 	}
 
@@ -6269,18 +6269,28 @@ unary_complex_lvalue (enum tree_code code, tree arg)
 
 /* Mark EXP saying that we need to be able to take the
    address of it; it should not be allocated in a register.
-   Value is true if successful.
+   Value is true if successful.  ARRAY_REF_P is true if this
+   is for ARRAY_REF construction - in that case we don't want
+   to look through VIEW_CONVERT_EXPR from VECTOR_TYPE to ARRAY_TYPE,
+   it is fine to use ARRAY_REFs for vector subscripts on vector
+   register variables.
 
    C++: we do not allow `current_class_ptr' to be addressable.  */
 
 bool
-cxx_mark_addressable (tree exp)
+cxx_mark_addressable (tree exp, bool array_ref_p)
 {
   tree x = exp;
 
   while (1)
     switch (TREE_CODE (x))
       {
+      case VIEW_CONVERT_EXPR:
+	if (array_ref_p
+	    && TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE
+	    && VECTOR_TYPE_P (TREE_TYPE (TREE_OPERAND (x, 0))))
+	  return true;
+	/* FALLTHRU */
       case ADDR_EXPR:
       case COMPONENT_REF:
       case ARRAY_REF:

gcc/testsuite/ChangeLog

 2017-03-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/80162
+	* c-c++-common/pr80162-1.c: New test.
+	* c-c++-common/pr80162-2.c: New test.
+	* c-c++-common/pr80162-3.c: New test.
+
 	PR target/80102
 	* g++.dg/opt/pr80102.C: New test.
 

gcc/testsuite/c-c++-common/pr80162-1.c

+/* PR middle-end/80162 */
+/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
+/* { dg-options "-msse2 -ffixed-xmm7" } */
+
+typedef int v8 __attribute__ ((vector_size (8)));
+struct U { v8 a; v8 b; };
+register struct U u asm ("xmm7");
+
+int *
+foo (int i)
+{
+  return &u.a[i];	/* { dg-error "address of \[^ \n\r]* register variable" } */
+}

gcc/testsuite/c-c++-common/pr80162-2.c

+/* PR middle-end/80162 */
+/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
+/* { dg-options "-mavx2 -ffixed-xmm7" } */
+
+typedef int V __attribute__ ((vector_size (32)));
+register V u asm ("xmm7");
+
+int
+foo (int i)
+{
+  return u[i];
+}
+
+int
+bar (void)
+{
+  return u[5];
+}

gcc/testsuite/c-c++-common/pr80162-3.c

+/* PR middle-end/80162 */
+/* { dg-do compile { target { { i?86-*-* x86_64-*-* } && lp64 } } } */
+/* { dg-options "-mavx2 -ffixed-xmm7" } */
+
+typedef int V __attribute__ ((vector_size (32)));
+register V u asm ("xmm7");
+
+int *
+foo (int i)
+{
+  return &u[i];		/* { dg-error "address of \[^ \n\r]* register variable" } */
+}
+
+int *
+bar (void)
+{
+  return &u[5];		/* { dg-error "address of \[^ \n\r]* register variable" } */
+}