Fix false dependence of scalar operation vrcp/vsqrt/vrsqrt/vrndscale
For instructions with xmm operand: op %xmmN,%xmmQ,%xmmQ ----> op %xmmN, %xmmN, %xmmQ for instruction with mem operand or gpr operand: op mem/gpr, %xmmQ, %xmmQ ---> using pass rpad ----> xorps %xmmN, %xmmN, %xxN op mem/gpr, %xmmN, %xmmQ Performance influence of SPEC2017 fprate which is tested on SKX ---- 503.bwaves_r -0.03% 507.cactuBSSN_r -0.22% 508.namd_r -0.02% 510.parest_r 0.37% 511.povray_r 0.74% 519.lbm_r 0.24% 521.wrf_r 2.35% 526.blender_r 0.71% 527.cam4_r 0.65% 538.imagick_r 0.95% 544.nab_r -0.37 549.fotonik3d_r 0.24% 554.roms_r 0.90% fprate geomean 0.50% ----- Changelog gcc/ * config/i386/i386.md (*rcpsf2_sse): Add avx_partial_xmm_update, prefer m constraint for TARGET_AVX. (*rsqrtsf2_sse): Ditto. (*sqrt<mode>2_sse): Ditto. (sse4_1_round<mode>2): separate constraint vm, add avx_partail_xmm_update, prefer m constraint for TARGET_AVX. * config/i386/sse.md (*sse_vmrcpv4sf2"): New define_insn used by pass rpad. (*<sse>_vmsqrt<mode>2<mask_scalar_name><round_scalar_name>*): Ditto. (*sse_vmrsqrtv4sf2): Ditto. (*avx512f_rndscale<mode><round_saeonly_name>): Ditto. (*sse4_1_round<ssescalarmodesuffix>): Ditto. (sse4_1_round<ssescalarmodesuffix>): Add m constraint and <iptr> pointer size modifier since vround support memory operand. gcc/testsuite * gcc.target/i386/pr87007-4.c: New test. * gcc.target/i386/pr87007-5.c: Ditto. From-SVN: r277469
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gcc/testsuite/gcc.target/i386/pr87007-4.c
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gcc/testsuite/gcc.target/i386/pr87007-5.c
0 → 100644
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