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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/101956] New: Miss vectorization from v4hi to v4df Date: Wed, 18 Aug 2021 06:00:02 +0000 [thread overview] Message-ID: <bug-101956-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101956 Bug ID: 101956 Summary: Miss vectorization from v4hi to v4df Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: crazylht at gmail dot com Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-*-* i?86-*-* void foo (double* p, short* q) { p[0] = q[0]; p[1] = q[1]; p[2] = q[2]; p[3] = q[3]; } clang generates vpmovsxwd xmm0, qword ptr [rsi] vcvtdq2pd ymm0, xmm0 vmovups ymmword ptr [rdi], ymm0 vzeroupper gcc generates foo(double*, short*): movswl (%rsi), %eax vxorps %xmm0, %xmm0, %xmm0 vcvtsi2sdl %eax, %xmm0, %xmm1 movswl 2(%rsi), %eax vcvtsi2sdl %eax, %xmm0, %xmm2 movswl 4(%rsi), %eax vmovsd %xmm2, %xmm2, %xmm3 vcvtsi2sdl %eax, %xmm0, %xmm2 movswl 6(%rsi), %eax vcvtsi2sdl %eax, %xmm0, %xmm0 vunpcklpd %xmm0, %xmm2, %xmm2 vunpcklpd %xmm3, %xmm1, %xmm0 vinsertf128 $0x1, %xmm2, %ymm0, %ymm0 vmovupd %ymm0, (%rdi) vzeroupper ret
next reply other threads:[~2021-08-18 6:00 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-18 6:00 crazylht at gmail dot com [this message] 2021-08-18 6:11 ` [Bug target/101956] " crazylht at gmail dot com 2021-08-18 6:49 ` crazylht at gmail dot com 2021-08-18 6:54 ` [Bug tree-optimization/101956] " rguenth at gcc dot gnu.org 2022-03-07 21:42 ` pinskia at gcc dot gnu.org 2023-11-01 3:35 ` crazylht at gmail dot com
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