https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96422
Bug ID: 96422
Summary: [11 regression] Comparison failure in some 32-bit
libgomp PIC objects
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Target: amd64-pc-solaris2.11, i386-pc-solaris2.11
Between 20200730 (561a19c3011f7bde3a41f2a27ea979118e3a2dff) and 20200731
(ed0b4bb29a50d6be0e4b6411b3cc9f22967f1313), Solaris/x86 bootstrap began to
fail:
I'm seeing several comparison failures:
Bootstrap comparison failure!
i386-pc-solaris2.11/libgomp/.libs/task.o differs
i386-pc-solaris2.11/libgomp/.libs/target.o differs
i386-pc-solaris2.11/libgomp/.libs/oacc-mem.o differs
i386-pc-solaris2.11/libgomp/.libs/oacc-init.o differs
i386-pc-solaris2.11/libgomp/.libs/oacc-parallel.o differs
They only affect the 32-bit PIC objects, both for 32-bit-default and
64-bit-default
builds. However, this only happens when the native assembler is used;
bootstraps
with gas work fine.
I haven't done much analysis yet. However, for the smallest of the files
Solaris elfdiff shows:
$ elfdiff -e oacc-parallel.o.stage?
*** section: [11].debug_info: data information differs
< 0x1d11: \01 s \12 s \07 \0 \0 \1a \0d \0 \0 F \08 \17 \0 \0
> 0x1d11: \01 s \12 s \07 \0 \0 \0e \0d \0 \0 F \08 \17 \0 \0
*** section: [13].debug_loc: shdr information differs
< sh_size: 0xf54 sh_type: [ SHT_PROGBITS ]
> sh_size: 0xf48 sh_type: [ SHT_PROGBITS ]
*** section: [13].debug_loc: data information differs
< 0xcb9: \01 \0 \0 \02 \0 3 \9f p \01 \0 \0 \9e \01 \0 \0 \02
> 0xcb9: \01 \0 \0 \02 \0 3 \9f z \01 \0 \0 \9e \01 \0 \0 \02
It seems plausible that this patch
2020-07-31 Richard Biener <rguent...@suse.de>
PR debug/96383
* langhooks-def.h (lhd_finalize_early_debug): Declare.
(LANG_HOOKS_FINALIZE_EARLY_DEBUG): Define.
(LANG_HOOKS_INITIALIZER): Amend.
* langhooks.c: Include cgraph.h and debug.h.
(lhd_finalize_early_debug): Default implementation from
former code in finalize_compilation_unit.
* langhooks.h (lang_hooks::finalize_early_debug): Add.
* cgraphunit.c (symbol_table::finalize_compilation_unit):
Call the finalize_early_debug langhook.
is the culprit.
