Simplify (trunc)MAX/MIN((extend)a, (extend)b) to MAX/MIN(a,b)

a and b are same type as trunc type and has less precision than
extend type.

gcc/ChangeLog:

	PR target/102464
	* match.pd: Simplify (trunc)fmax/fmin((extend)a, (extend)b) to
	MAX/MIN(a,b)

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr102464-maxmin.c: New test.

diff --git a/gcc/match.pd b/gcc/match.pd
index 986b052bc939f60b6a3afffefec0cd8125b770f4..7826af1998a5b0a270837b5ca84b2fb110955dc8 100644 (file)
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -6243,6 +6243,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
        && direct_internal_fn_supported_p (as_internal_fn (tos),
                                          type, OPTIMIZE_FOR_BOTH))
     (tos @0 @1 @2))))
+
+(for maxmin (max min)
+ (simplify
+  (convert (maxmin (convert@2 @0) (convert @1)))
+   (if (optimize
+       && FLOAT_TYPE_P (type)
+       && FLOAT_TYPE_P (TREE_TYPE (@2))
+       && types_match (type, TREE_TYPE (@0))
+       && types_match (type, TREE_TYPE (@1))
+       && element_precision (type) < element_precision (TREE_TYPE (@2)))
+    (maxmin @0 @1))))
 #endif
 
 (for froms (XFLOORL XCEILL XROUNDL XRINTL)

diff --git a/gcc/testsuite/gcc.target/i386/pr102464-maxmin.c b/gcc/testsuite/gcc.target/i386/pr102464-maxmin.c
new file mode 100644 (file)
index 0000000..3786723
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr102464-maxmin.c
@@ -0,0 +1,44 @@
+/* PR target/102464.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -mavx512fp16 -mavx512vl -ffast-math -ftree-vectorize -mtune=generic -mfpmath=sse" } */
+/* { dg-final { scan-assembler-times "vmaxph" 3 } }  */
+/* { dg-final { scan-assembler-times "vminph" 3 } }  */
+/* { dg-final { scan-assembler-times "vmaxsh" 3 } }  */
+/* { dg-final { scan-assembler-times "vminsh" 3 } }  */
+/* { dg-final { scan-assembler-times "vmaxps" 2 } }  */
+/* { dg-final { scan-assembler-times "vminps" 2 } }  */
+/* { dg-final { scan-assembler-times "vmaxss" 2 } }  */
+/* { dg-final { scan-assembler-times "vminss" 2 } }  */
+/* { dg-final { scan-assembler-times "vmaxpd" 1 } }  */
+/* { dg-final { scan-assembler-times "vminpd" 1 } }  */
+/* { dg-final { scan-assembler-times "vmaxsd" 1 } }  */
+/* { dg-final { scan-assembler-times "vminsd" 1 } }  */
+
+#include<math.h>
+#define FOO(CODE,TYPE,SUFFIX)                                          \
+  void                                                                 \
+  foo_vect_##CODE##TYPE##SUFFIX (TYPE* __restrict a, TYPE* b, TYPE* c) \
+  {                                                                    \
+    for (int i = 0; i != 8; i++)                                       \
+      a[i] = CODE##SUFFIX (b[i], c[i]);                                        \
+  }                                                                    \
+  TYPE                                                                 \
+  foo_##CODE##TYPE##SUFFIX (TYPE b, TYPE c)                            \
+  {                                                                    \
+    return CODE##l (b, c);                                             \
+  }
+
+FOO (fmax, _Float16, f);
+FOO (fmax, _Float16,);
+FOO (fmax, _Float16, l);
+FOO (fmin, _Float16, f);
+FOO (fmin, _Float16,);
+FOO (fmin, _Float16, l);
+
+FOO (fmax, float,);
+FOO (fmax, float, l);
+FOO (fmin, float,);
+FOO (fmin, float, l);
+
+FOO (fmax, double, l);
+FOO (fmin, double, l);