Implement P0001R1 - C++17 removal of register storage class specifier c-family/

	Implement P0001R1 - C++17 removal of register storage class specifier
c-family/
	* c.opt (Wregister): New warning.
	* c-opts.c (c_common_post_options): Enable -Wregister by
	default for C++17.
cp/
	* decl.c (cp_finish_decl): Diagnose register storage class
	on vars except when used in GNU global or local register variable
	extension.
	(grokdeclarator): Diagnose register storage class on parameters.
	* except.c (expand_start_catch_block): Set DECL_REGISTER only
	after cp_finish_decl call.
testsuite/
	* c-c++-common/Wvarargs-2.c (foo1): Except new warning for C++17.
	* c-c++-common/vector-subscript-2.c (vf): Expect new error for
	C++17.
	* c-c++-common/vector-subscript-5.c (foo): Don't use register
	keyword if not __SSE2__.
	* c-c++-common/Wvarargs.c (foo1, foo3): Expect new warnings for
	C++17.
	* g++.dg/compat/struct-layout-1_generate.c (iterative_hash): Remove
	register keywords.
	* g++.dg/eh/pr29166.C: Add -Wno-register option.
	* g++.dg/warn/register-parm-1.C (erroneous_warning,
	no_erroneous_warning): Expect new warnings for C++17.
	* g++.dg/warn/register-var-2.C (f): Likewise.
	* g++.dg/parse/register1.C (f): Expect new error for C++17.
	* g++.dg/parse/linkage2.C (foo): Likewise.
	* g++.dg/torture/pr36826.C (CoinMin, CoinMax): Avoid register
	keyword on parameters for C++17.
	* g++.dg/cpp1z/register1.C: New test.
	* g++.dg/cpp1z/register2.C: New test.
	* g++.dg/cpp1z/register3.C: New test.

From-SVN: r240638

4 files changed, 8 insertions, 5 deletions

diff --git a/gcc/testsuite/c-c++-common/Wvarargs-2.c b/gcc/testsuite/c-c++-common/Wvarargs-2.c
index a2e031f..1eacde1 100644
--- a/gcc/testsuite/c-c++-common/Wvarargs-2.c
+++ b/gcc/testsuite/c-c++-common/Wvarargs-2.c
@@ -23,7 +23,7 @@ foo0 (int a, int b, ...)
 }
 
 void
-foo1 (int a, register int b, ...)
+foo1 (int a, register int b, ...)	// { dg-warning "ISO C\\+\\+1z does not allow 'register' storage class specifier" "" { target c++1z } }
 {
     va_list vp;
     /* 'b' is declared with register storage, but don't warn
diff --git a/gcc/testsuite/c-c++-common/Wvarargs.c b/gcc/testsuite/c-c++-common/Wvarargs.c
index 0f90cb3..20d8ec7 100644
--- a/gcc/testsuite/c-c++-common/Wvarargs.c
+++ b/gcc/testsuite/c-c++-common/Wvarargs.c
@@ -23,7 +23,7 @@ foo0 (int a, int b, ...)
 }
 
 void
-foo1 (int a, register int b, ...)
+foo1 (int a, register int b, ...)	// { dg-warning "ISO C\\+\\+1z does not allow 'register' storage class specifier" "" { target c++1z } }
 {
     va_list vp;
     /* 'b' is declared with register storage, but don't warn
@@ -45,7 +45,7 @@ foo2 (int a, int b, ...)
 }
 
 void
-foo3 (int a, register int b, ...)
+foo3 (int a, register int b, ...)	// { dg-warning "ISO C\\+\\+1z does not allow 'register' storage class specifier" "" { target c++1z } }
 {
     va_list vp;
     /* 'b' is declared with register storage, so warn.  */
diff --git a/gcc/testsuite/c-c++-common/vector-subscript-2.c b/gcc/testsuite/c-c++-common/vector-subscript-2.c
index 84d55b9..e7bd251 100644
--- a/gcc/testsuite/c-c++-common/vector-subscript-2.c
+++ b/gcc/testsuite/c-c++-common/vector-subscript-2.c
@@ -7,6 +7,6 @@
 
 float vf(int i)
 {
-  register vector float a;
+  register vector float a;	// { dg-error "ISO C++1z does not allow 'register' storage class specifier" "" { target c++1z } }
   return a[0];
 }
diff --git a/gcc/testsuite/c-c++-common/vector-subscript-5.c b/gcc/testsuite/c-c++-common/vector-subscript-5.c
index 916b4a2..66ed87a 100644
--- a/gcc/testsuite/c-c++-common/vector-subscript-5.c
+++ b/gcc/testsuite/c-c++-common/vector-subscript-5.c
@@ -5,7 +5,10 @@ typedef int U __attribute__ ((vector_size (16)));
 int
 foo (int i)
 {
-  register U u
+#if __SSE2__
+  register
+#endif
+    U u
 #if __SSE2__
       asm ("xmm0")
 #endif