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From: "wcohen at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/96937] Duplicate DW_TAG_formal_parameter in out-of-line
 DW_TAG_subprogram instance
Date: Thu, 09 Dec 2021 16:40:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96937

--- Comment #7 from Will Cohen <wcohen at redhat dot com> ---
Created attachment 51963
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D51963&action=3Dedit
Reproducer showing duplicate formal parameters from kernel probe_rom.i

Compiled with following to generate probe_rom.o with duplicate k formal
parameters in the debuginfo:

gcc  -Wp,-MMD,arch/x86/kernel/.probe_roms.o.d -nostdinc -D__KERNEL__
-fmacro-pre
fix-map=3D./=3D -Wall -Wundef -Werror=3Dstrict-prototypes -Wno-trigraphs
-fno-strict-a
liasing -fno-common -fshort-wchar -fno-PIE
-Werror=3Dimplicit-function-declaration
 -Werror=3Dimplicit-int -Werror=3Dreturn-type -Wno-format-security -std=3Dg=
nu89
-mno-s
se -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=3Dnone -m64
-falign-jump
s=3D1 -falign-loops=3D1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-bou=
ndary=3D3
-
mskip-rax-setup -mtune=3Dgeneric -mno-red-zone -mcmodel=3Dkernel -Wno-sign-=
compare
-
fno-asynchronous-unwind-tables -mindirect-branch=3Dthunk-extern
-mindirect-branch-
register -fno-jump-tables -fno-delete-null-pointer-checks -Wno-frame-address
-Wn
o-format-truncation -Wno-format-overflow -Wno-address-of-packed-member -O2
-fno-
allow-store-data-races -Wframe-larger-than=3D2048 -fstack-protector-strong
"-Wimpl
icit-fallthrough=3D5" -Wno-main -Wno-unused-but-set-variable
-Wno-unused-const-var
iable -fno-stack-clash-protection -pg -mrecord-mcount -mfentry
-DCC_USING_FENTRY
 -Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-trunca=
tion=20
-Wno-zero-length-bounds -Wno-array-bounds -Wno-stringop-overflow -Wno-restr=
ict
-
Wno-maybe-uninitialized -Wno-alloc-size-larger-than -fno-strict-overflow
-fno-st
ack-check -fconserve-stack -Werror=3Ddate-time -Werror=3Dincompatible-point=
er-types=20
-Werror=3Ddesignated-init -Wno-packed-not-aligned -g=20=20=20
-DKBUILD_MODFILE=3D'"arch/x8
6/kernel/probe_roms"' -DKBUILD_BASENAME=3D'"probe_roms"'
-DKBUILD_MODNAME=3D'"probe_
roms"' -D__KBUILD_MODNAME=3Dkmod_probe_roms -c -o probe_roms.o probe_roms.i=