support for AMD clzero isa.

gcc/ChangeLog
2015-12-06  Victoria Stepanyan  <victoria.stepanyan@amd.com>

        * common/config/i386/i386-common.c
        (OPTION_MASK_ISA_CLZERO_SET): New.
        (ix86_handle_option): Handle clzero.
        * config.gcc (i[34567]86-*-*): Add clzerointrin.h,
        (x86_64-*-*): Likewise.
        * config/i386/clzerointrin.h: New header.
        * config/i386/cpuid.h (bit_CLZERO):  Define.
        * config/i386/driver-i386.c (host_detect_local_cpu): Detect
        CLZERO support.
        * config/i386/i386.opt (clzero): New.
        * config/i386/i386-c.c: Define __CLZERO__ if needed.
        * config/i386/i386.c (ix86_target_string): Define -mclzero option.
        (PTA_CLZERO): New.
        (ix86_option_override_internal): Handle new option.
        (processor_alias_table): Added PTA_CLZERO.
        (ix86_valid_target_attribute_inner_p): Add OPT_mclzero.
        (ix86_builtins): Add IX86_BUILTIN_CLZERO, IX86_BUILTIN_CLZERO.
        (ix86_expand_builtin): Handle IX86_BUILTIN_CLZERO and
        IX86_BUILTIN_CLZERO  built-ins.
        * config/i386/i386.h (TARGET_CLZERO):  New.
        * config/i386/i386.md (unspecv): Add UNSPEC_CLZERO.
        (clzero):  New pattern.
        (clzero_<mode>): New pattern.
        * config/i386/x86intrin.h: Include clzerointrin.h.
        * doc/extend.texi: Document clzero builtins.
        * doc/invoke.texi: Document -mclzero option.

gcc/testsuite/ChangeLog
2015-12-06  Victoria Stepanyan  <victoria.stepanyan@amd.com>

        * gcc.target/i386/clzero.c: New.
        * gcc.target/i386/sse-12.c: Add -mclzero.
        * gcc.target/i386/sse-13.c: Ditto.
        * gcc.target/i386/sse-14.c: Ditto.
        * gcc.target/i386/sse-22.c: Ditto.
        * gcc.target/i386/sse-23.c: Ditto.
        * g++.dg/other/i386-2.C: Ditto.
        * g++.dg/other/i386-3.C: Ditto.

From-SVN: r231340

19 files changed, 168 insertions, 13 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 62a4d3c5747..71f0931efbb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,32 @@
+2015-12-06  Victoria Stepanyan  <victoria.stepanyan@amd.com>
+
+	* common/config/i386/i386-common.c
+	(OPTION_MASK_ISA_CLZERO_SET): New.
+	(ix86_handle_option): Handle clzero.
+	* config.gcc (i[34567]86-*-*): Add clzerointrin.h,
+	(x86_64-*-*): Likewise.
+	* config/i386/clzerointrin.h: New header.
+	* config/i386/cpuid.h (bit_CLZERO):  Define.
+	* config/i386/driver-i386.c (host_detect_local_cpu): Detect
+	CLZERO support.
+	* config/i386/i386.opt (clzero): New.
+	* config/i386/i386-c.c: Define __CLZERO__ if needed.
+	* config/i386/i386.c (ix86_target_string): Define -mclzero option.
+	(PTA_CLZERO): New.
+	(ix86_option_override_internal): Handle new option.
+	(processor_alias_table): Added PTA_CLZERO.
+	(ix86_valid_target_attribute_inner_p): Add OPT_mclzero.
+	(ix86_builtins): Add IX86_BUILTIN_CLZERO, IX86_BUILTIN_CLZERO.
+	(ix86_expand_builtin): Handle IX86_BUILTIN_CLZERO and
+	IX86_BUILTIN_CLZERO  built-ins.
+	* config/i386/i386.h (TARGET_CLZERO):  New.
+	* config/i386/i386.md (unspecv): Add UNSPEC_CLZERO.
+	(clzero):  New pattern.
+	(clzero_<mode>): New pattern.
+	* config/i386/x86intrin.h: Include clzerointrin.h.
+	* doc/extend.texi: Document clzero builtins.
+	* doc/invoke.texi: Document -mclzero option.
+
 2015-12-05  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-icf.c (sem_function::merge): Check that local_original exists.
diff --git a/gcc/common/config/i386/i386-common.c b/gcc/common/config/i386/i386-common.c
index 49899bd6fa6..a9d2208bc49 100644
--- a/gcc/common/config/i386/i386-common.c
+++ b/gcc/common/config/i386/i386-common.c
@@ -128,6 +128,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA_F16C_SET \
   (OPTION_MASK_ISA_F16C | OPTION_MASK_ISA_AVX_SET)
 #define OPTION_MASK_ISA_MWAITX_SET OPTION_MASK_ISA_MWAITX
+#define OPTION_MASK_ISA_CLZERO_SET OPTION_MASK_ISA_CLZERO
 
 /* Define a set of ISAs which aren't available when a given ISA is
    disabled.  MMX and SSE ISAs are handled separately.  */
@@ -188,6 +189,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA_PCOMMIT_UNSET OPTION_MASK_ISA_PCOMMIT
 #define OPTION_MASK_ISA_CLWB_UNSET OPTION_MASK_ISA_CLWB
 #define OPTION_MASK_ISA_MWAITX_UNSET OPTION_MASK_ISA_MWAITX
+#define OPTION_MASK_ISA_CLZERO_UNSET OPTION_MASK_ISA_CLZERO
 
 /* SSE4 includes both SSE4.1 and SSE4.2.  -mno-sse4 should the same
    as -mno-sse4.1. */
@@ -947,6 +949,20 @@ ix86_handle_option (struct gcc_options *opts,
 	}
       return true;
 
+    case OPT_mclzero:
+      if (value)
+	{
+	  opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CLZERO_SET;
+	  opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLZERO_SET;
+	}
+      else
+	{
+	  opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_CLZERO_UNSET;
+	  opts->x_ix86_isa_flags_explicit |= OPTION_MASK_ISA_CLZERO_UNSET;
+	}
+      return true;
+
+
   /* Comes from final.c -- no real reason to change it.  */
 #define MAX_CODE_ALIGN 16
 
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 96ec76a1c16..882e4134b4c 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -372,7 +372,7 @@ i[34567]86-*-*)
 		       xsavesintrin.h avx512dqintrin.h avx512bwintrin.h
 		       avx512vlintrin.h avx512vlbwintrin.h avx512vldqintrin.h
 		       avx512ifmaintrin.h avx512ifmavlintrin.h avx512vbmiintrin.h
-		       avx512vbmivlintrin.h clwbintrin.h pcommitintrin.h mwaitxintrin.h"
+		       avx512vbmivlintrin.h clwbintrin.h pcommitintrin.h mwaitxintrin.h clzerointrin.h"
 	;;
 x86_64-*-*)
 	cpu_type=i386
@@ -393,7 +393,7 @@ x86_64-*-*)
 		       xsavesintrin.h avx512dqintrin.h avx512bwintrin.h
 		       avx512vlintrin.h avx512vlbwintrin.h avx512vldqintrin.h
 		       avx512ifmaintrin.h avx512ifmavlintrin.h avx512vbmiintrin.h
-		       avx512vbmivlintrin.h clwbintrin.h pcommitintrin.h mwaitxintrin.h"
+		       avx512vbmivlintrin.h clwbintrin.h pcommitintrin.h mwaitxintrin.h clzerointrin.h"
 	;;
 ia64-*-*)
 	extra_headers=ia64intrin.h
diff --git a/gcc/config/i386/clzerointrin.h b/gcc/config/i386/clzerointrin.h
new file mode 100644
index 00000000000..696585b6d88
--- /dev/null
+++ b/gcc/config/i386/clzerointrin.h
@@ -0,0 +1,44 @@
+/* Copyright (C) 2012-2015 Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GCC is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _CLZEROINTRIN_H_INCLUDED
+#define _CLZEROINTRIN_H_INCLUDED
+
+#ifndef __CLZERO__
+#pragma GCC push_options
+#pragma GCC target("clzero")
+#define __DISABLE_CLZERO__
+#endif /* __CLZERO__ */
+
+extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_clzero (void * __I)
+{
+  __builtin_ia32_clzero (__I);
+}
+
+#ifdef __DISABLE_CLZERO__
+#undef __DISABLE_CLZERO__
+#pragma GCC pop_options
+#endif /* __DISABLE_CLZERO__ */
+
+#endif /* _CLZEROINTRIN_H_INCLUDED */
diff --git a/gcc/config/i386/i386-c.c b/gcc/config/i386/i386-c.c
index e3a301205e6..0f3c3ec452c 100644
--- a/gcc/config/i386/i386-c.c
+++ b/gcc/config/i386/i386-c.c
@@ -439,6 +439,8 @@ ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
     def_or_undef (parse_in, "__CLWB__");
   if (isa_flag & OPTION_MASK_ISA_MWAITX)
     def_or_undef (parse_in, "__MWAITX__");
+  if (isa_flag & OPTION_MASK_ISA_CLZERO)
+    def_or_undef (parse_in, "__CLZERO__");
   if (TARGET_IAMCU)
     {
       def_or_undef (parse_in, "__iamcu");
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 4247af353ac..1e6969f483e 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2501,6 +2501,7 @@ static rtx (*ix86_gen_sub3_carry) (rtx, rtx, rtx, rtx, rtx);
 static rtx (*ix86_gen_one_cmpl2) (rtx, rtx);
 static rtx (*ix86_gen_monitor) (rtx, rtx, rtx);
 static rtx (*ix86_gen_monitorx) (rtx, rtx, rtx);
+static rtx (*ix86_gen_clzero) (rtx);
 static rtx (*ix86_gen_andsp) (rtx, rtx, rtx);
 static rtx (*ix86_gen_allocate_stack_worker) (rtx, rtx);
 static rtx (*ix86_gen_adjust_stack_and_probe) (rtx, rtx, rtx);
@@ -5370,6 +5371,7 @@ ix86_option_override_internal (bool main_args_p,
       ix86_gen_probe_stack_range = gen_probe_stack_rangedi;
       ix86_gen_monitor = gen_sse3_monitor_di;
       ix86_gen_monitorx = gen_monitorx_di;
+      ix86_gen_clzero = gen_clzero_di;
     }
   else
     {
@@ -5383,6 +5385,7 @@ ix86_option_override_internal (bool main_args_p,
       ix86_gen_probe_stack_range = gen_probe_stack_rangesi;
       ix86_gen_monitor = gen_sse3_monitor_si;
       ix86_gen_monitorx = gen_monitorx_si;
+      ix86_gen_clzero = gen_clzero_si;
     }
 
 #ifdef USE_IX86_CLD
@@ -5915,6 +5918,7 @@ ix86_valid_target_attribute_inner_p (tree args, char *p_strings[],
     IX86_ATTR_ISA ("clwb",	OPT_mclwb),
     IX86_ATTR_ISA ("pcommit",	OPT_mpcommit),
     IX86_ATTR_ISA ("mwaitx",	OPT_mmwaitx),
+    IX86_ATTR_ISA ("clzero",    OPT_mclzero),
 
     /* enum options */
     IX86_ATTR_ENUM ("fpmath=",	OPT_mfpmath_),
@@ -30009,6 +30013,7 @@ enum ix86_builtins
 
   IX86_BUILTIN_MONITOR,
   IX86_BUILTIN_MWAIT,
+  IX86_BUILTIN_CLZERO,
 
   /* SSSE3.  */
   IX86_BUILTIN_PHADDW,
@@ -35893,6 +35898,10 @@ ix86_init_mmx_sse_builtins (void)
   def_builtin (OPTION_MASK_ISA_MWAITX, "__builtin_ia32_mwaitx",
 	       VOID_FTYPE_UNSIGNED_UNSIGNED_UNSIGNED, IX86_BUILTIN_MWAITX);
 
+  /* CLZERO.  */
+  def_builtin (OPTION_MASK_ISA_CLZERO, "__builtin_ia32_clzero",
+               VOID_FTYPE_PCVOID, IX86_BUILTIN_CLZERO);
+
   /* Add FMA4 multi-arg argument instructions */
   for (i = 0, d = bdesc_multi_arg; i < ARRAY_SIZE (bdesc_multi_arg); i++, d++)
     {
@@ -40663,6 +40672,14 @@ ix86_expand_builtin (tree exp, rtx target, rtx subtarget,
       emit_insn (gen_mwaitx (op0, op1, op2));
       return 0;
 
+    case IX86_BUILTIN_CLZERO:
+      arg0 = CALL_EXPR_ARG (exp, 0);
+      op0 = expand_normal (arg0);
+      if (!REG_P (op0))
+	op0 = ix86_zero_extend_to_Pmode (op0);
+      emit_insn (ix86_gen_clzero (op0));
+      return 0;
+
     case IX86_BUILTIN_VEC_INIT_V2SI:
     case IX86_BUILTIN_VEC_INIT_V4HI:
     case IX86_BUILTIN_VEC_INIT_V8QI:
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index f2b20412137..fd0a706217c 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -265,6 +265,9 @@
   UNSPECV_MONITORX
   UNSPECV_MWAITX
 
+  ;; For CLZERO support
+  UNSPECV_CLZERO
+
 ])
 
 ;; Constants to represent rounding modes in the ROUND instruction
@@ -19120,6 +19123,15 @@
   [(set (attr "length")
      (symbol_ref ("(Pmode != word_mode) + 3")))])
 
+;; CLZERO
+(define_insn "clzero_<mode>"
+  [(unspec_volatile [(match_operand: P 0 "register_operand" "a")]
+                   UNSPECV_CLZERO)]
+  "TARGET_CLZERO"
+  "clzero"
+  [(set_attr "length" "3")
+  (set_attr "memory" "unknown")])
+
 ;; MPX instructions
 
 (define_expand "<mode>_mk"
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 2723c22213b..730b753ba4b 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -751,10 +751,6 @@ mclflushopt
 Target Report Mask(ISA_CLFLUSHOPT) Var(ix86_isa_flags) Save
 Support CLFLUSHOPT instructions.
 
-mclzero
-Target Report Mask(ISA_CLZERO) Var(ix86_isa_flags) Save
-Support CLZERO instructions.
-
 mclwb
 Target Report Mask(ISA_CLWB) Var(ix86_isa_flags) Save
 Support CLWB instruction.
@@ -876,6 +872,10 @@ mmwaitx
 Target Report Mask(ISA_MWAITX) Var(ix86_isa_flags) Save
 Support MWAITX and MONITORX built-in functions and code generation.
 
+mclzero
+Target Report Mask(ISA_CLZERO) Var(ix86_isa_flags) Save
+Support CLZERO built-in functions and code generation.
+
 mstack-protector-guard=
 Target RejectNegative Joined Enum(stack_protector_guard) Var(ix86_stack_protector_guard) Init(SSP_TLS)
 Use given stack-protector guard.
diff --git a/gcc/config/i386/x86intrin.h b/gcc/config/i386/x86intrin.h
index 3ff571d24f4..9b292b35434 100644
--- a/gcc/config/i386/x86intrin.h
+++ b/gcc/config/i386/x86intrin.h
@@ -93,6 +93,8 @@
 
 #include <mwaitxintrin.h>
 
+#include <clzerointrin.h>
+
 #endif /* __iamcu__ */
 
 #endif /* _X86INTRIN_H_INCLUDED */
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 650aa94bdb3..883d9b334ab 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -18337,6 +18337,12 @@ void __builtin_ia32_monitorx (void *, unsigned int, unsigned int)
 void __builtin_ia32_mwaitx (unsigned int, unsigned int, unsigned int)
 @end smallexample
 
+The following built-in functions are available when @option{-mclzero} is used.
+All of them generate the machine instruction that is part of the name.
+@smallexample
+void __builtin_i32_clzero (void *)
+@end smallexample
+
 @node x86 transactional memory intrinsics
 @subsection x86 Transactional Memory Intrinsics
 
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 52560313881..33f579f88cd 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1101,7 +1101,7 @@ See RS/6000 and PowerPC Options.
 -mpclmul -mfsgsbase -mrdrnd -mf16c -mfma @gol
 -mprefetchwt1 -mclflushopt -mxsavec -mxsaves @gol
 -msse4a -m3dnow -mpopcnt -mabm -mbmi -mtbm -mfma4 -mxop -mlzcnt @gol
--mbmi2 -mfxsr -mxsave -mxsaveopt -mrtm -mlwp -mmpx -mmwaitx -mthreads @gol
+-mbmi2 -mfxsr -mxsave -mxsaveopt -mrtm -mlwp -mmpx -mmwaitx -mclzero -mthreads @gol
 -mms-bitfields -mno-align-stringops  -minline-all-stringops @gol
 -minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol
 -mmemcpy-strategy=@var{strategy} -mmemset-strategy=@var{strategy} @gol
@@ -23216,6 +23216,9 @@ preferred alignment to @option{-mpreferred-stack-boundary=2}.
 @need 200
 @itemx -mmwaitx
 @opindex mmwaitx
+@need 200
+@itemx -mclzero
+@opindex mclzero
 These switches enable the use of instructions in the MMX, SSE,
 SSE2, SSE3, SSSE3, SSE4.1, AVX, AVX2, AVX512F, AVX512PF, AVX512ER, AVX512CD,
 SHA, AES, PCLMUL, FSGSBASE, RDRND, F16C, FMA, SSE4A, FMA4, XOP, LWP, ABM,
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d9b592a3771..682272fc6e9 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2015-12-06  Victoria Stepanyan  <victoria.stepanyan@amd.com>
+
+	* gcc.target/i386/clzero.c: New.
+	* gcc.target/i386/sse-12.c: Add -mclzero.
+	* gcc.target/i386/sse-13.c: Ditto.
+	* gcc.target/i386/sse-14.c: Ditto.
+	* gcc.target/i386/sse-22.c: Ditto.
+	* gcc.target/i386/sse-23.c: Ditto.
+	* g++.dg/other/i386-2.C: Ditto.
+	* g++.dg/other/i386-3.C: Ditto.
+
 2015-12-05  David Edelsohn  <dje.gcc@gmail.com>
 
 	* gcc.target/powerpc/recip-sqrtf.c: New test.
diff --git a/gcc/testsuite/g++.dg/other/i386-2.C b/gcc/testsuite/g++.dg/other/i386-2.C
index 887eb18acdc..99caa10210e 100644
--- a/gcc/testsuite/g++.dg/other/i386-2.C
+++ b/gcc/testsuite/g++.dg/other/i386-2.C
@@ -1,5 +1,5 @@
 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
-/* { dg-options "-O -pedantic-errors -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt  -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx" } */
+/* { dg-options "-O -pedantic-errors -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt  -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx -mclzero" } */
 
 /* Test that {,x,e,p,t,s,w,a,b,i}mmintrin.h, mm3dnow.h, fma4intrin.h,
    xopintrin.h, abmintrin.h, bmiintrin.h, tbmintrin.h, lwpintrin.h,
diff --git a/gcc/testsuite/g++.dg/other/i386-3.C b/gcc/testsuite/g++.dg/other/i386-3.C
index 9555ccb34de..49b4484a98b 100644
--- a/gcc/testsuite/g++.dg/other/i386-3.C
+++ b/gcc/testsuite/g++.dg/other/i386-3.C
@@ -1,5 +1,5 @@
 /* { dg-do compile { target i?86-*-* x86_64-*-* } } */
-/* { dg-options "-O -fkeep-inline-functions -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx" } */
+/* { dg-options "-O -fkeep-inline-functions -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx -mclzero" } */
 
 /* Test that {,x,e,p,t,s,w,a,b,i}mmintrin.h, mm3dnow.h, fma4intrin.h,
    xopintrin.h, abmintrin.h, bmiintrin.h, tbmintrin.h, lwpintrin.h,
diff --git a/gcc/testsuite/gcc.target/i386/clzero.c b/gcc/testsuite/gcc.target/i386/clzero.c
new file mode 100644
index 00000000000..9a68a4928a8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/clzero.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -mclzero" } */
+
+/* Verify that they work in both 32bit and 64bit.  */
+
+#include <x86intrin.h>
+
+void
+foo (void *k)
+{
+   _mm_clzero (k);
+}
+
diff --git a/gcc/testsuite/gcc.target/i386/sse-12.c b/gcc/testsuite/gcc.target/i386/sse-12.c
index 1db0d8bddd0..8b7ef6d960b 100644
--- a/gcc/testsuite/gcc.target/i386/sse-12.c
+++ b/gcc/testsuite/gcc.target/i386/sse-12.c
@@ -3,7 +3,7 @@
    popcntintrin.h and mm_malloc.h are usable
    with -O -std=c89 -pedantic-errors.  */
 /* { dg-do compile } */
-/* { dg-options "-O -std=c89 -pedantic-errors -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512bw -mavx512dq -mavx512vl -mavx512vbmi -mavx512ifma -mclwb -mpcommit -mmwaitx" } */
+/* { dg-options "-O -std=c89 -pedantic-errors -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512bw -mavx512dq -mavx512vl -mavx512vbmi -mavx512ifma -mclwb -mpcommit -mmwaitx -mclzero" } */
 
 #include <x86intrin.h>
 
diff --git a/gcc/testsuite/gcc.target/i386/sse-13.c b/gcc/testsuite/gcc.target/i386/sse-13.c
index 13d9eb878ef..0592370ef26 100644
--- a/gcc/testsuite/gcc.target/i386/sse-13.c
+++ b/gcc/testsuite/gcc.target/i386/sse-13.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -Werror-implicit-function-declaration -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512vl -mavx512dq -mavx512bw -mavx512vbmi -mavx512ifma -mclwb -mpcommit -mmwaitx" } */
+/* { dg-options "-O2 -Werror-implicit-function-declaration -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512vl -mavx512dq -mavx512bw -mavx512vbmi -mavx512ifma -mclwb -mpcommit -mmwaitx -mclzero" } */
 
 #include <mm_malloc.h>
 
diff --git a/gcc/testsuite/gcc.target/i386/sse-14.c b/gcc/testsuite/gcc.target/i386/sse-14.c
index 52f78025d64..1baf6fc0c22 100644
--- a/gcc/testsuite/gcc.target/i386/sse-14.c
+++ b/gcc/testsuite/gcc.target/i386/sse-14.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O0 -Werror-implicit-function-declaration -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx" } */
+/* { dg-options "-O0 -Werror-implicit-function-declaration -march=k8 -msse4a -m3dnow -mavx -mavx2 -mfma4 -mxop -maes -mpclmul -mpopcnt -mabm -mlzcnt -mbmi -mbmi2 -mtbm -mlwp -mfsgsbase -mrdrnd -mf16c -mfma -mrtm -mrdseed -mprfchw -madx -mfxsr -mxsaveopt -mavx512f -mavx512er -mavx512cd -mavx512pf -msha -mprefetchwt1 -mxsavec -mxsaves -mclflushopt -mavx512dq -mavx512bw -mavx512vl -mavx512ifma -mavx512vbmi -mclwb -mpcommit -mmwaitx -mclzero" } */
 /* { dg-add-options bind_pic_locally } */
 
 #include <mm_malloc.h>
diff --git a/gcc/testsuite/gcc.target/i386/sse-23.c b/gcc/testsuite/gcc.target/i386/sse-23.c
index a3660f8b2cb..45613547c42 100644
--- a/gcc/testsuite/gcc.target/i386/sse-23.c
+++ b/gcc/testsuite/gcc.target/i386/sse-23.c
@@ -594,6 +594,6 @@
 #define __builtin_ia32_extracti64x2_256_mask(A, E, C, D) __builtin_ia32_extracti64x2_256_mask(A, 1, C, D)
 #define __builtin_ia32_extractf64x2_256_mask(A, E, C, D) __builtin_ia32_extractf64x2_256_mask(A, 1, C, D)
 
-#pragma GCC target ("sse4a,3dnow,avx,avx2,fma4,xop,aes,pclmul,popcnt,abm,lzcnt,bmi,bmi2,tbm,lwp,fsgsbase,rdrnd,f16c,fma,rtm,rdseed,prfchw,adx,fxsr,xsaveopt,avx512f,avx512er,avx512cd,avx512pf,sha,prefetchwt1,xsavec,xsaves,clflushopt,avx512bw,avx512dq,avx512vl,avx512vbmi,avx512ifma,clwb,pcommit,mwaitx")
+#pragma GCC target ("sse4a,3dnow,avx,avx2,fma4,xop,aes,pclmul,popcnt,abm,lzcnt,bmi,bmi2,tbm,lwp,fsgsbase,rdrnd,f16c,fma,rtm,rdseed,prfchw,adx,fxsr,xsaveopt,avx512f,avx512er,avx512cd,avx512pf,sha,prefetchwt1,xsavec,xsaves,clflushopt,avx512bw,avx512dq,avx512vl,avx512vbmi,avx512ifma,clwb,pcommit,mwaitx,clzero")
 
 #include <x86intrin.h>