[gcc r12-6071] Optimize bit_and op1 float_vector_all_ones_operands to op1.

[hongtao Liu]

https://gcc.gnu.org/g:19dcecd963295b02b96c8cac57933657dbe3234a

commit r12-6071-g19dcecd963295b02b96c8cac57933657dbe3234a
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Dec 15 13:07:30 2021 +0800

    Optimize bit_and op1 float_vector_all_ones_operands to op1.
    
    gcc/ChangeLog:
    
            PR target/98468
            * config/i386/sse.md (*bit_and_float_vector_all_ones): New
            pre-reload splitter.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/i386/pr98468.c: New test.

Diff:
---
 gcc/config/i386/sse.md                  | 12 +++++++++++
 gcc/testsuite/gcc.target/i386/pr98468.c | 35 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 827ffbba8f3..5196149ee32 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -4465,6 +4465,18 @@
 		      (const_string "<sseinsnmode>")
 		      (const_string "XI")))])
 
+;; Generic part doesn't support the simpliciation of logic operation with
+;; float_vector_all_ones_operand since it's not valid rtl. Add combine spiltter
+;; for them, it should be safe since there's no SIMD Floating-Point Exceptions.
+(define_insn_and_split "*bit_and_float_vector_all_ones"
+  [(set (match_operand:VFB 0 "nonimmediate_operand")
+	(and:VFB (match_operand:VFB 1 "nonimmediate_operand")
+		 (match_operand:VFB 2 "float_vector_all_ones_operand")))]
+ "TARGET_SSE && ix86_pre_reload_split ()"
+ "#"
+ "&& 1"
+ [(set (match_dup 0) (match_dup 1))])
+
 (define_expand "copysign<mode>3"
   [(set (match_dup 4)
 	(and:VFB
diff --git a/gcc/testsuite/gcc.target/i386/pr98468.c b/gcc/testsuite/gcc.target/i386/pr98468.c
new file mode 100644
index 00000000000..ca3aa256c52
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr98468.c
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-mavx512dq -mavx512vl -O2" } */
+/* { dg-final { scan-assembler-not "vxorp" } } */
+/* { dg-final { scan-assembler-not "vandnp" } } */
+
+#include<immintrin.h>
+__m128 f(__m128 val)
+{
+    return _mm_andnot_ps(_mm_set_ps1(0.0f), val);
+}
+
+__m256 f2(__m256 val)
+{
+    return _mm256_andnot_ps(_mm256_set1_ps(0.0f), val);
+}
+
+__m512 f3(__m512 val)
+{
+    return _mm512_andnot_ps(_mm512_set1_ps(0.0f), val);
+}
+
+__m128d f4(__m128d val)
+{
+    return _mm_andnot_pd(_mm_set_pd1(0.0), val);
+}
+
+__m256d f5(__m256d val)
+{
+    return _mm256_andnot_pd(_mm256_set1_pd(0.0), val);
+}
+
+__m512d f6(__m512d val)
+{
+    return _mm512_andnot_pd(_mm512_set1_pd(0.0), val);
+}