https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82941
--- Comment #3 from speryt at gcc dot gnu.org --- Author: speryt Date: Mon Dec 4 11:03:37 2017 New Revision: 255378 URL: https://gcc.gnu.org/viewcvs?rev=255378&root=gcc&view=rev Log: Fix PR82941 and PR82942 by adding proper vzeroupper generation on SKX. Add X86_TUNE_EMIT_VZEROUPPER to indicate if vzeroupper instruction should be inserted before a transfer of control flow out of the function. It is turned on by default unless we are tuning for KNL. Users can always use -mzeroupper or -mno-zeroupper to override X86_TUNE_EMIT_VZEROUPPER. 2017-12-04 Sebastian Peryt <sebastian.pe...@intel.com> H.J. Lu <hongjiu...@intel.com> gcc/ Bakcported from trunk PR target/82941 PR target/82942 PR target/82990 * config/i386/i386.c (pass_insert_vzeroupper): Remove TARGET_AVX512F check from gate condition. (ix86_check_avx256_register): Changed to ... (ix86_check_avx_upper_register): ... this. Add extra check for VALID_AVX512F_REG_OR_XI_MODE. (ix86_avx_u128_mode_needed): Changed ix86_check_avx256_register to ix86_check_avx_upper_register. (ix86_check_avx256_stores): Changed to ... (ix86_check_avx_upper_stores): ... this. Changed ix86_check_avx256_register to ix86_check_avx_upper_register. (ix86_avx_u128_mode_after): Changed avx_reg256_found to avx_upper_reg_found. Changed ix86_check_avx256_stores to ix86_check_avx_upper_stores. (ix86_avx_u128_mode_entry): Changed ix86_check_avx256_register to ix86_check_avx_upper_register. (ix86_avx_u128_mode_exit): Ditto. (ix86_option_override_internal): Set MASK_VZEROUPPER if neither -mzeroupper nor -mno-zeroupper is used and TARGET_EMIT_VZEROUPPER is set. * config/i386/i386.h: (host_detect_local_cpu): New define. (TARGET_EMIT_VZEROUPPER): New. * config/i386/x86-tune.def: Add X86_TUNE_EMIT_VZEROUPPER. 2017-12-04 Sebastian Peryt <sebastian.pe...@intel.com> H.J. Lu <hongjiu...@intel.com> gcc/testsuite/ Backported from trunk PR target/82941 PR target/82942 PR target/82990 * gcc.target/i386/pr82941-1.c: New test. * gcc.target/i386/pr82941-2.c: Likewise. * gcc.target/i386/pr82942-1.c: Likewise. * gcc.target/i386/pr82942-2.c: Likewise. * gcc.target/i386/pr82990-1.c: Likewise. * gcc.target/i386/pr82990-2.c: Likewise. * gcc.target/i386/pr82990-3.c: Likewise. * gcc.target/i386/pr82990-4.c: Likewise. * gcc.target/i386/pr82990-5.c: Likewise. * gcc.target/i386/pr82990-6.c: Likewise. * gcc.target/i386/pr82990-7.c: Likewise. Added: branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-1.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82941-2.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-1.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82942-2.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-1.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-2.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-3.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-4.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-5.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-6.c branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr82990-7.c Modified: branches/gcc-7-branch/gcc/ChangeLog branches/gcc-7-branch/gcc/config/i386/i386.c branches/gcc-7-branch/gcc/config/i386/i386.h branches/gcc-7-branch/gcc/config/i386/x86-tune.def branches/gcc-7-branch/gcc/testsuite/ChangeLog
