a and b are same type as trunc type and has less precision than
extend type, the transformation is guarded by flag_finite_math_only.
Bootstrapped and regtested under x86_64-pc-linux-gnu{-m32,}
Ok for trunk?
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.
---
gcc/match.pd | 14 ++++++
.../gcc.target/i386/pr102464-maxmin.c | 44 +++++++++++++++++++
2 files changed, 58 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/i386/pr102464-maxmin.c
diff --git a/gcc/match.pd b/gcc/match.pd
index f63079023d0..857ce7f712a 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -6182,6 +6182,20 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& direct_internal_fn_supported_p (IFN_COPYSIGN,
type, OPTIMIZE_FOR_BOTH))
(IFN_COPYSIGN @0 @1))))
+
+(for maxmin (max min)
+ (simplify
+ (convert (maxmin (convert@2 @0) (convert @1)))
+ (if (flag_finite_math_only
+ && optimize
+ && FLOAT_TYPE_P (type)
+ && FLOAT_TYPE_P (TREE_TYPE (@2))
+ && types_match (type, TREE_TYPE (@0))
+ && types_match (type, TREE_TYPE (@1))
+ && TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (@2))
+ && optab_handler (maxmin == MAX_EXPR ? smax_optab : smin_optab,
+ TYPE_MODE (type)) != CODE_FOR_nothing)
+ (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
index 00000000000..37867235a6c
--- /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);
--
2.18.1
