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From: "juzhe.zhong at rivai dot ai" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/111751] New: RISC-V: RVV unexpected vectorization Date: Tue, 10 Oct 2023 03:19:01 +0000 [thread overview] Message-ID: <bug-111751-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111751 Bug ID: 111751 Summary: RISC-V: RVV unexpected vectorization Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: juzhe.zhong at rivai dot ai Target Milestone: --- #include <stdlib.h> #define N 16 int main () { int i; char ia[N]; char ic[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45}; char ib[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45}; /* Not vectorizable, multiplication */ for (i = 0; i < N; i++) { ia[i] = ib[i] * ic[i]; } /* check results: */ for (i = 0; i < N; i++) { if (ia[i] != (char) (ib[i] * ic[i])) abort (); } return 0; } RVV GCC ASM: main: lui a5,%hi(.LANCHOR0) addi a5,a5,%lo(.LANCHOR0) addi sp,sp,-48 ld a4,0(a5) ld a5,8(a5) sd a5,8(sp) sd a5,24(sp) sd ra,40(sp) addi a5,sp,16 sd a4,0(sp) sd a4,16(sp) vsetivli zero,16,e8,m1,ta,ma vle8.v v1,0(a5) vle8.v v2,0(sp) vmul.vv v1,v1,v2 vmv.x.s a5,v1 andi a5,a5,0xff bne a5,zero,.L2 vslidedown.vi v2,v1,1 li a4,9 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,2 li a4,36 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,3 li a4,81 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,4 li a4,144 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,5 li a4,225 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,6 li a4,68 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,7 li a4,185 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,8 li a4,64 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,9 li a4,217 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,10 li a4,132 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,11 li a4,65 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,12 li a4,16 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,13 li a4,241 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v2,v1,14 li a4,228 vmv.x.s a5,v2 andi a5,a5,0xff bne a5,a4,.L2 vslidedown.vi v1,v1,15 li a4,233 vmv.x.s a5,v1 andi a5,a5,0xff bne a5,a4,.L2 ld ra,40(sp) li a0,0 addi sp,sp,48 jr ra .L2: call abort ARM SVE GCC: main: mov w0, 0 ret
next reply other threads:[~2023-10-10 3:19 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-10-10 3:19 juzhe.zhong at rivai dot ai [this message] 2023-10-10 3:35 ` [Bug tree-optimization/111751] " pinskia at gcc dot gnu.org 2023-10-10 3:35 ` pinskia at gcc dot gnu.org 2023-10-10 3:36 ` pinskia at gcc dot gnu.org 2023-10-10 3:41 ` pinskia at gcc dot gnu.org 2023-10-10 3:51 ` juzhe.zhong at rivai dot ai 2023-10-10 3:55 ` pinskia at gcc dot gnu.org 2023-10-10 4:00 ` juzhe.zhong at rivai dot ai 2023-10-10 9:09 ` rguenth at gcc dot gnu.org 2023-10-10 9:24 ` juzhe.zhong at rivai dot ai 2023-10-10 9:32 ` rguenther at suse dot de 2023-10-10 10:38 ` cvs-commit at gcc dot gnu.org 2023-10-10 10:50 ` rguenth at gcc dot gnu.org 2023-10-10 11:17 ` juzhe.zhong at rivai dot ai 2023-10-10 11:23 ` juzhe.zhong at rivai dot ai 2023-10-10 11:40 ` juzhe.zhong at rivai dot ai 2023-10-10 11:49 ` rguenth at gcc dot gnu.org 2023-10-10 11:50 ` cvs-commit at gcc dot gnu.org 2023-10-10 11:56 ` juzhe.zhong at rivai dot ai 2023-10-10 12:20 ` cvs-commit at gcc dot gnu.org 2023-10-10 12:22 ` cvs-commit at gcc dot gnu.org 2023-10-10 12:47 ` juzhe.zhong at rivai dot ai
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