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From: "shihua at iscas dot ac.cn" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug regression/106888] New: [RISCV] Excess andi instructions are generated in gcc.dg/pr90838.c Date: Thu, 08 Sep 2022 09:36:36 +0000 [thread overview] Message-ID: <bug-106888-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106888 Bug ID: 106888 Summary: [RISCV] Excess andi instructions are generated in gcc.dg/pr90838.c Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: regression Assignee: unassigned at gcc dot gnu.org Reporter: shihua at iscas dot ac.cn Target Milestone: --- After this patch( https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=c23a9c87cc62bd177fd0d4db6ad34b34e1b9a31f),gcc.dg/pr90838.c failed. Before: .attribute arch, "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0_zbb1p0" .attribute unaligned_access, 0 .attribute stack_align, 16 .text .align 1 .globl ctz2 .type ctz2, @function ctz2: ctzw a0,a0 ret .size ctz2, .-ctz2 .align 1 .globl ctz3 .type ctz3, @function ctz3: ctzw a0,a0 ret .size ctz3, .-ctz3 After: .attribute arch, "rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0_zbb1p0" .attribute unaligned_access, 0 .attribute stack_align, 16 .text .align 1 .globl ctz1 .type ctz1, @function ctz2: ctzw a0,a0 andi a0,a0,127 ret .size ctz2, .-ctz2 .align 1 .globl ctz3 .type ctz3, @function ctz3: ctzw a0,a0 andi a0,a0,127 ret .size ctz3, .-ctz3
next reply other threads:[~2022-09-08 9:36 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-08 9:36 shihua at iscas dot ac.cn [this message] 2022-09-08 9:46 ` [Bug tree-optimization/106888] [RISCV] Negative optimization that excess " shihua at iscas dot ac.cn 2023-04-20 19:00 ` pinskia at gcc dot gnu.org 2023-04-20 23:06 ` vineetg at gcc dot gnu.org 2023-04-20 23:44 ` law at gcc dot gnu.org 2023-04-21 17:27 ` roger at nextmovesoftware dot com 2023-04-21 17:38 ` law at gcc dot gnu.org 2023-04-21 21:18 ` vineetg at gcc dot gnu.org 2023-04-21 22:07 ` law at gcc dot gnu.org 2023-04-22 0:08 ` vineetg at gcc dot gnu.org 2023-04-22 0:16 ` law at gcc dot gnu.org 2023-05-20 2:55 ` cvs-commit at gcc dot gnu.org 2023-05-20 3:03 ` law at gcc dot gnu.org
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