testsuite: Improve g++.dg/ext/attr-parm-1.C testcase [PR94946]

The testcase in the current form doesn't FAIL without the patch on
x86_64-linux unless also testing with -m32; as that the 64-bit testing
on that target is probably way more common, and we can use also attributes
that FAIL without the patch with -m64, the following patch adjusts the
test, so that it FAILs without the patch for both -m64 and -m32 (but not
-mx32) and PASSes with the patch.

2020-05-07  Jakub Jelinek  <jakub@redhat.com>

	PR c++/94946
	* g++.dg/ext/attr-parm-1.C: Enable the test also for lp64 x86, use
	sysv_abi and ms_abi attributes in that case instead of fastcall and
	no attribute.

gcc/ChangeLog

-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
+2020-05-07  Jakub Jelinek  <jakub@redhat.com>
+
+	Backported from mainline
+	2020-05-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/94950
 	* config/riscv/riscv-builtins.c (riscv_atomic_assign_expand_fenv): Use
 	TARGET_EXPR instead of MODIFY_EXPR for first assignment to old_flags.
 
-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
-
 	PR rtl-optimization/94873
 	* combine.c (combine_instructions): Don't optimize using REG_EQUAL
 	note if SET_SRC (set) has side-effects.
 
-2020-05-05  Jakub Jelinek  <jakub@redhat.com>
+	2020-05-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/94942
 	* config/i386/mmx.md (*vec_dupv4hi): Use xYw constraints instead of Yv.
 
-2020-05-04  Jakub Jelinek  <jakub@redhat.com>
+	2020-05-04  Jakub Jelinek  <jakub@redhat.com>
 
 	* opts.c (get_option_html_page): Instead of hardcoding a list of
 	options common between C/C++ and Fortran only use gfortran/

gcc/c/ChangeLog

-2020-04-30  Jakub Jelinek  <jakub@redhat.com>
+2020-05-07  Jakub Jelinek  <jakub@redhat.com>
+
+	Backported from mainline
+	2020-04-30  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/94842
 	* c-decl.c (set_labels_context_r): In addition to context-less

gcc/cp/ChangeLog

-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
+2020-05-07  Jakub Jelinek  <jakub@redhat.com>
+
+	Backported from mainline
+	2020-05-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/94951
 	* typeck.c (cp_strict_aliasing_warning): New function.
 	(cp_build_indirect_ref_1, build_reinterpret_cast_1): Use
 	it instead of strict_aliasing_warning.
 
-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
-
 	PR c++/94907
 	* method.c (defaulted_late_check): Don't call synthesize_method
 	on constexpr sfk_comparison if it has been called on it already.

gcc/testsuite/ChangeLog

-202-05-07  Jakub Jelinek  <jakub@redhat.com>
+2020-05-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/94946
+	* g++.dg/ext/attr-parm-1.C: Enable the test also for lp64 x86, use
+	sysv_abi and ms_abi attributes in that case instead of fastcall and
+	no attribute.
 
 	PR c/94968
 	* gcc.dg/pr94968.c: New test.
 
-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
+	Backported from mainline
+	2020-05-06  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/94951
 	* g++.dg/warn/Wstrict-aliasing-bogus-tmpl.C: New test.
 
-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
-
 	PR c++/94907
 	* g++.dg/cpp2a/spaceship-synth8.C: New test.
 
-2020-05-06  Jakub Jelinek  <jakub@redhat.com>
-
 	PR rtl-optimization/94873
 	* gcc.dg/pr94873.c: New test.
 
-2020-05-05  Jakub Jelinek  <jakub@redhat.com>
+	2020-05-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/94942
 	* gcc.target/i386/pr94942.c: New test.
 
-2020-04-30  Jakub Jelinek  <jakub@redhat.com>
+	2020-04-30  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/94842
 	* gcc.dg/pr94842.c: New test.

gcc/testsuite/g++.dg/ext/attr-parm-1.C

-// { dg-do compile { target { { i?86-*-* x86_64-*-* } && ia32 } } }
+// { dg-do compile { target { { i?86-*-* x86_64-*-* } && { ia32 || lp64 } } } }
 // PR 94946
 class a {
+#ifdef __LP64__
+  template <typename b> a(b(__attribute__((sysv_abi)) *c)());
+  template <typename b> a(b(__attribute__((ms_abi)) *c)());
+#else
   template <typename b> a(b (*)());
   template <typename b> a(b(__attribute__((fastcall)) *c)());
+#endif
 };