https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96998
Bug ID: 96998
Summary: GCC ICEs in on building AArch64 Linux kernel after
basepoints/gcc-11-2903-g6b3034eaba83
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mkuvyrkov at gcc dot gnu.org
Target Milestone: ---
GCC ICEs on building Linux kernel for AArch64 target after
basepoints/gcc-11-2903-g6b3034eaba83:
===
commit 6b3034eaba83935d9f6dfb20d2efbdb34b5b00bf
Author: Alex Coplan <alex.cop...@arm.com>
Date: Thu Aug 27 09:49:57 2020 +0100
lra: Canonicalize mult to shift in address reloads
===
The error message is:
===
00:01:02 during RTL pass: reload
00:01:02 mm/backing-dev.c: In function ‘clear_bdi_congested’:
00:01:02 mm/backing-dev.c:930:1: internal compiler error: in
lra_set_insn_recog_data, at lra.c:1006
00:01:02 930 | }
00:01:02 | ^
00:01:03 0xb4f991 lra_set_insn_recog_data(rtx_insn*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1004
00:01:03 0xb4feb7 lra_get_insn_recog_data
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra-int.h:488
00:01:03 0xb4feb7 lra_update_insn_regno_info(rtx_insn*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1625
00:01:03 0xb50027 lra_update_insn_regno_info(rtx_insn*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1774
00:01:03 0xb50027 lra_push_insn_1
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1780
00:01:03 0xb50027 lra_push_insn(rtx_insn*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1788
00:01:03 0xb50027 push_insns
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1831
00:01:03 0xb51c0c push_insns
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/rtl.h:886
00:01:03 0xb51c0c lra_process_new_insns(rtx_insn*, rtx_insn*, rtx_insn*, char
const*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:1879
00:01:03 0xb6981e curr_insn_transform
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra-constraints.c:4572
00:01:03 0xb6b7cd lra_constraints(bool)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra-constraints.c:5066
00:01:03 0xb52c4c lra(_IO_FILE*)
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/lra.c:2415
00:01:03 0xb032a9 do_reload
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/ira.c:5525
00:01:03 0xb032a9 execute
00:01:03
/home/tcwg-buildslave/workspace/tcwg_kernel_0/abe/snapshots/gcc.git~master/gcc/ira.c:5711
00:01:03 Please submit a full bug report,
00:01:03 with preprocessed source if appropriate.
00:01:03 Please include the complete backtrace with any bug report.
00:01:03 See <https://gcc.gnu.org/bugs/> for instructions.
00:01:03 scripts/Makefile.build:283: recipe for target 'mm/backing-dev.o'
failed
00:01:03 make[1]: *** [mm/backing-dev.o] Error 1
===
Toolchain configurations is a no-frills default aarch64-linux-gnu toolchain,
but only linux-next tree seems to be affected. It's possible that the ICE is
due to a wrong register constraint in a poorly-tested patch in linux-next.
Nevertheless, the ICE is worth investigating.
The linux-next tree as tested was "7a6956579ce69 Add linux-next specific files
for 20200903".
More details on the toolchain build:
https://ci.linaro.org/view/tcwg_kernel-gnu/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-next-allnoconfig/4/artifact/artifacts/build-first_bad/04-build_abe-stage1/console.log/*view*/
More details on the linux build:
https://ci.linaro.org/view/tcwg_kernel-gnu/job/tcwg_kernel-gnu-bisect-gnu-master-aarch64-next-allnoconfig/4/artifact/artifacts/build-first_bad/05-build_linux/console.log/*view*/
.
