From 07327a8871d8e8eec1f33be31ea0bfdc0596ddd8 Mon Sep 17 00:00:00 2001 From: Sergey Shalnov Date: Fri, 22 Sep 2017 12:43:11 +0300 Subject: [PATCH 1/1] Avoid useing zmm if TARGET_PREFER_AVX256 --- gcc/config/i386/i386.md | 6 ++++-- .../gcc.target/i386/avx512f-constant-float-return.c | 15 +++++++++++++++ 2 files changed, 19 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/avx512f-constant-float-return.c diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index f51e02c..b9a3928 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -3524,7 +3524,8 @@ (eq_attr "alternative" "12,16") (cond [(not (match_test "TARGET_SSE2")) (const_string "V4SF") - (match_test "TARGET_AVX512F") + (and (match_test "TARGET_AVX512F") + (not (match_test "TARGET_PREFER_AVX256"))) (const_string "XI") (match_test "TARGET_AVX") (const_string "V2DF") @@ -3693,7 +3694,8 @@ (eq_attr "alternative" "5") (cond [(not (match_test "TARGET_SSE2")) (const_string "V4SF") - (match_test "TARGET_AVX512F") + (and (match_test "TARGET_AVX512F") + (not (match_test "TARGET_PREFER_AVX256"))) (const_string "V16SF") (match_test "TARGET_AVX") (const_string "V4SF") diff --git a/gcc/testsuite/gcc.target/i386/avx512f-constant-float-return.c b/gcc/testsuite/gcc.target/i386/avx512f-constant-float-return.c new file mode 100644 index 0000000..153cf69 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx512f-constant-float-return.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O3 -march=skylake-avx512 -mprefer-avx256" } */ +/* { dg-final { scan-assembler-not "%zmm\[0-9\]+" } } */ + +float +my_test_f() +{ + return 0.0f; +} + +double +my_test_d() +{ + return 0.0; +} -- 1.8.3.1