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(localhost [IPv6:::1]) by gnu-cfl-2.localdomain (Postfix) with ESMTP id 4E283C02D6; Sat, 17 Jul 2021 18:40:56 -0700 (PDT) To: gcc-patches@gcc.gnu.org Subject: [PATCH] ix86: Enable the GPR only instructions for -mgeneral-regs-only Date: Sat, 17 Jul 2021 18:40:56 -0700 Message-Id: <20210718014056.983478-1-hjl.tools@gmail.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Spam-Status: No, score=-3034.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: "H.J. Lu via Gcc-patches" From: "H.J. Lu" Reply-To: "H.J. Lu" Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" For -mgeneral-regs-only, enable the GPR only instructions which are enabled implicitly by SSE ISAs unless they have been disabled explicitly. gcc/ PR target/101492 * common/config/i386/i386-common.c (ix86_handle_option): For -mgeneral-regs-only, enable the GPR only instructions which are enabled implicitly by SSE ISAs unless they have been disabled explicitly. gcc/testsuite/ PR target/101492 * gcc.target/i386/pr101492-1.c: New test. * gcc.target/i386/pr101492-2.c: Likewise. * gcc.target/i386/pr101492-3.c: Likewise. * gcc.target/i386/pr101492-4.c: Likewise. --- gcc/common/config/i386/i386-common.c | 27 ++++++++++++++++++++-- gcc/testsuite/gcc.target/i386/pr101492-1.c | 10 ++++++++ gcc/testsuite/gcc.target/i386/pr101492-2.c | 10 ++++++++ gcc/testsuite/gcc.target/i386/pr101492-3.c | 10 ++++++++ gcc/testsuite/gcc.target/i386/pr101492-4.c | 12 ++++++++++ 5 files changed, 67 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-1.c create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-2.c create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-3.c create mode 100644 gcc/testsuite/gcc.target/i386/pr101492-4.c diff --git a/gcc/common/config/i386/i386-common.c b/gcc/common/config/i386/i386-common.c index e156cc34584..76ab1a14e54 100644 --- a/gcc/common/config/i386/i386-common.c +++ b/gcc/common/config/i386/i386-common.c @@ -354,16 +354,39 @@ ix86_handle_option (struct gcc_options *opts, case OPT_mgeneral_regs_only: if (value) { + HOST_WIDE_INT general_regs_only_flags = 0; + HOST_WIDE_INT general_regs_only_flags2 = 0; + + /* NB: Enable the GPR only instructions which are enabled + implicitly by SSE ISAs unless they have been disabled + explicitly. */ + if (TARGET_SSE4_2_P (opts->x_ix86_isa_flags)) + { + if (!TARGET_EXPLICIT_CRC32_P (opts)) + general_regs_only_flags |= OPTION_MASK_ISA_CRC32; + if (!TARGET_EXPLICIT_POPCNT_P (opts)) + general_regs_only_flags |= OPTION_MASK_ISA_POPCNT; + } + if (TARGET_SSE3_P (opts->x_ix86_isa_flags)) + { + if (!TARGET_EXPLICIT_MWAIT_P (opts)) + general_regs_only_flags2 |= OPTION_MASK_ISA2_MWAIT; + } + /* Disable MMX, SSE and x87 instructions if only general registers are allowed. */ opts->x_ix86_isa_flags &= ~OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET; opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET; + opts->x_ix86_isa_flags |= general_regs_only_flags; + opts->x_ix86_isa_flags2 |= general_regs_only_flags2; opts->x_ix86_isa_flags_explicit - |= OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET; + |= (OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET + | general_regs_only_flags); opts->x_ix86_isa_flags2_explicit - |= OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET; + |= (OPTION_MASK_ISA2_GENERAL_REGS_ONLY_UNSET + | general_regs_only_flags2); opts->x_target_flags &= ~MASK_80387; } diff --git a/gcc/testsuite/gcc.target/i386/pr101492-1.c b/gcc/testsuite/gcc.target/i386/pr101492-1.c new file mode 100644 index 00000000000..41002571761 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101492-1.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -msse4.2 -mgeneral-regs-only" } */ + +#include + +unsigned int +foo1 (unsigned int x, unsigned int y) +{ + return __crc32d (x, y); +} diff --git a/gcc/testsuite/gcc.target/i386/pr101492-2.c b/gcc/testsuite/gcc.target/i386/pr101492-2.c new file mode 100644 index 00000000000..c7d24f43c39 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101492-2.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -msse4.2 -mgeneral-regs-only" } */ + +#include + +unsigned int +foo1 (unsigned int x) +{ + return _mm_popcnt_u32 (x); +} diff --git a/gcc/testsuite/gcc.target/i386/pr101492-3.c b/gcc/testsuite/gcc.target/i386/pr101492-3.c new file mode 100644 index 00000000000..37e2071ab57 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101492-3.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -msse3 -mgeneral-regs-only" } */ + +#include + +void +foo1 (unsigned int x, unsigned int y) +{ + _mm_mwait (x, y); +} diff --git a/gcc/testsuite/gcc.target/i386/pr101492-4.c b/gcc/testsuite/gcc.target/i386/pr101492-4.c new file mode 100644 index 00000000000..c5a4f0abd25 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101492-4.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mno-mwait -msse3 -mgeneral-regs-only" } */ + +#include + +void +foo1 (unsigned int x, unsigned int y) +{ + _mm_mwait (x, y); +} + +/* { dg-error "target specific option mismatch" "" { target *-*-* } 0 } */