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(localhost [IPv6:::1]) by gnu-tgl-3.localdomain (Postfix) with ESMTP id 98832C0125; Tue, 27 Sep 2022 16:34:54 -0700 (PDT) From: "H.J. Lu" To: gcc-patches@gcc.gnu.org Cc: Hongyu Wang , Hongtao Liu , Uros Bizjak Subject: [PATCH] i386: Mark XMM4-XMM6 as clobbered by encodekey128/encodekey256 Date: Tue, 27 Sep 2022 16:34:54 -0700 Message-Id: <20220927233454.144656-1-hjl.tools@gmail.com> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-3026.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,GIT_PATCH_0,KAM_NUMSUBJECT,KAM_SHORT,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: encodekey128 and encodekey256 operations clear XMM4-XMM6. But it is documented that XMM4-XMM6 are reserved for future usages and software should not rely upon them being zeroed. Change encodekey128 and encodekey256 to clobber XMM4-XMM6. gcc/ PR target/107061 * config/i386/predicates.md (encodekey128_operation): Check XMM4-XMM6 as clobbered. (encodekey256_operation): Likewise. * config/i386/sse.md (encodekey128u32): Clobber XMM4-XMM6. (encodekey256u32): Likewise. gcc/testsuite/ PR target/107061 * gcc.target/i386/keylocker-encodekey128.c: Don't check XMM4-XMM6. * gcc.target/i386/keylocker-encodekey256.c: Likewise. --- gcc/config/i386/predicates.md | 20 +++++++++---------- gcc/config/i386/sse.md | 4 ++-- .../gcc.target/i386/keylocker-encodekey128.c | 1 - .../gcc.target/i386/keylocker-encodekey256.c | 1 - 4 files changed, 12 insertions(+), 14 deletions(-) diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md index 655eabf793b..c4141a96735 100644 --- a/gcc/config/i386/predicates.md +++ b/gcc/config/i386/predicates.md @@ -2107,11 +2107,11 @@ (define_predicate "encodekey128_operation" for(i = 4; i < 7; i++) { elt = XVECEXP (op, 0, i); - if (GET_CODE (elt) != SET - || GET_CODE (SET_DEST (elt)) != REG - || GET_MODE (SET_DEST (elt)) != V2DImode - || REGNO (SET_DEST (elt)) != GET_SSE_REGNO (i) - || SET_SRC (elt) != CONST0_RTX (V2DImode)) + if (GET_CODE (elt) != CLOBBER + || GET_MODE (elt) != VOIDmode + || GET_CODE (XEXP (elt, 0)) != REG + || GET_MODE (XEXP (elt, 0)) != V2DImode + || REGNO (XEXP (elt, 0)) != GET_SSE_REGNO (i)) return false; } @@ -2157,11 +2157,11 @@ (define_predicate "encodekey256_operation" for(i = 4; i < 7; i++) { elt = XVECEXP (op, 0, i + 1); - if (GET_CODE (elt) != SET - || GET_CODE (SET_DEST (elt)) != REG - || GET_MODE (SET_DEST (elt)) != V2DImode - || REGNO (SET_DEST (elt)) != GET_SSE_REGNO (i) - || SET_SRC (elt) != CONST0_RTX (V2DImode)) + if (GET_CODE (elt) != CLOBBER + || GET_MODE (elt) != VOIDmode + || GET_CODE (XEXP (elt, 0)) != REG + || GET_MODE (XEXP (elt, 0)) != V2DImode + || REGNO (XEXP (elt, 0)) != GET_SSE_REGNO (i)) return false; } diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 5c189635124..076064f97e6 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -29015,7 +29015,7 @@ (define_expand "encodekey128u32" for (i = 4; i < 7; i++) XVECEXP (operands[2], 0, i) - = gen_rtx_SET (xmm_regs[i], CONST0_RTX (V2DImode)); + = gen_rtx_CLOBBER (VOIDmode, xmm_regs[i]); XVECEXP (operands[2], 0, 7) = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (CCmode, FLAGS_REG)); @@ -29072,7 +29072,7 @@ (define_expand "encodekey256u32" for (i = 4; i < 7; i++) XVECEXP (operands[2], 0, i + 1) - = gen_rtx_SET (xmm_regs[i], CONST0_RTX (V2DImode)); + = gen_rtx_CLOBBER (VOIDmode, xmm_regs[i]); XVECEXP (operands[2], 0, 8) = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (CCmode, FLAGS_REG)); diff --git a/gcc/testsuite/gcc.target/i386/keylocker-encodekey128.c b/gcc/testsuite/gcc.target/i386/keylocker-encodekey128.c index 805e0628673..57fa9bdc831 100644 --- a/gcc/testsuite/gcc.target/i386/keylocker-encodekey128.c +++ b/gcc/testsuite/gcc.target/i386/keylocker-encodekey128.c @@ -6,7 +6,6 @@ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm0,\[^\\n\\r\]*" } } */ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm1,\[^\\n\\r\]*16\[^\\n\\r\]*" } } */ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm2,\[^\\n\\r\]*32\[^\\n\\r\]*" } } */ -/* { dg-final { scan-assembler "(?:movdqa|movaps)\[ \\t\]+\[^\\n\]*%xmm\[4-6\],\[^\\n\\r\]*" } } */ #include diff --git a/gcc/testsuite/gcc.target/i386/keylocker-encodekey256.c b/gcc/testsuite/gcc.target/i386/keylocker-encodekey256.c index 26f04dcf014..a9398b4e7a2 100644 --- a/gcc/testsuite/gcc.target/i386/keylocker-encodekey256.c +++ b/gcc/testsuite/gcc.target/i386/keylocker-encodekey256.c @@ -8,7 +8,6 @@ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm1,\[^\\n\\r\]*16\[^\\n\\r\]*" } } */ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm2,\[^\\n\\r\]*32\[^\\n\\r\]*" } } */ /* { dg-final { scan-assembler "(?:movdqu|movups)\[ \\t\]+\[^\\n\]*%xmm3,\[^\\n\\r\]*48\[^\\n\\r\]*" } } */ -/* { dg-final { scan-assembler "(?:movdqa|movaps)\[ \\t\]+\[^\\n\]*%xmm\[4-6\],\[^\\n\\r\]*" } } */ #include -- 2.37.3