https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Tim Turner changed:
What|Removed |Added
CC||timturnerc at yahoo dot com
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Georg-Johann Lay changed:
What|Removed |Added
Target Milestone|--- |6.2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #23 from Senthil Kumar Selvaraj ---
Tracking binutils bug https://sourceware.org/bugzilla/show_bug.cgi?id=20545
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #22 from Senthil Kumar Selvaraj ---
Confirmed that it's a linker issue related to adjusting reloc addends in the
presence of align directives. Found two separate bugs, will post patches later
this week.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #21 from Senthil Kumar Selvaraj ---
It occurs with "7.0.0 20160824 (experimental) (GCC)". Besides, the errors go
away if I remove --relax, so I think it's a linker issue.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #20 from Georg-Johann Lay ---
(In reply to Senthil Kumar Selvaraj from comment #19)
> Can reproduce this on trunk
So it's not related to PR72767 then? (Fixed since 2016-08-01)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #19 from Senthil Kumar Selvaraj ---
Can reproduce this on trunk with binutils master. Mostly likely a
binutils/linker bug, as turning off relaxation fixes the error. Will debug
further and post the conclusions.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Urja Rannikko changed:
What|Removed |Added
CC||urjaman at gmail dot com
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #17 from Georg-Johann Lay ---
What about the performance issue re. crossing the jump table with a branch?
An easy fix would be to emit ".subsection 1" before the jump table; you think
we should do this?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Senthil Kumar Selvaraj changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Senthil Kumar Selvaraj changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #15 from Georg-Johann Lay ---
Author: gjl
Date: Mon Aug 1 09:15:24 2016
New Revision: 238935
URL: https://gcc.gnu.org/viewcvs?rev=238935=gcc=rev
Log:
gcc/
Backport from 2016-06-16 trunk r237536.
2016-06-16 Senthil
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #14 from Georg-Johann Lay ---
Author: gjl
Date: Fri Jul 1 12:09:53 2016
New Revision: 237910
URL: https://gcc.gnu.org/viewcvs?rev=237910=gcc=rev
Log:
gcc/testsuite/
PR target/71151
* gcc.target/avr/pr71151-common.h
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #13 from Georg-Johann Lay ---
Disadvantage of havong tables in same text section a code is that code side
might increase for the following reason: branches that cross a switch
statement will also have to cross the jump table, hence
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #12 from Senthil Kumar Selvaraj
---
Yes, tiny also has .rodata in .data
I'd totally missed PR 63323, so just removing the target hook and turning on
JUMP_TABLES_IN_TEXT_SECTION does the trick, like you said. Wrote a basic test
to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #11 from Georg-Johann Lay ---
well, IIRC for Tiny .rodata is still a part of .data and not part of .text? If
this is still the case, then on Tiny the best place for jump tables is also
.text.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #10 from Georg-Johann Lay ---
Well, then we should remove TARGET_ASM_FUNCTION_RODATA_SECTION implementation
altogether (it's weird, not only because it patches flag_data_sections), same
for ASM_OUTPUT_ADDR_VEC_ELT.
Instead implement
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #9 from Senthil Kumar Selvaraj
---
For both kinds of invocation (mergeable constants and jump tables), the decl
passed is current_function_decl. And that looks right from the documentation
for the target hook.
I'll submit another
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #8 from Georg-Johann Lay ---
What about avr_asm_function_rodata_section? Isn't it possible to filter DECL
and only transform for addr_vect?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #7 from Senthil Kumar Selvaraj
---
Created attachment 38613
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38613=edit
Tentative patch for 6.1
Looks like the right fix will need to somehow differentiate between jump tables
and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #6 from Georg-Johann Lay ---
(In reply to Anatol from comment #5)
> It is a severe compiler issue that stop avr-gcc 6 from using.
> Consider changing "Importance" status to blocker.
It's definite not a "blocker". "blocker" would
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #5 from Anatol ---
This bug has been reported by Arch Linux users.
https://bugs.archlinux.org/task/49284
It is a severe compiler issue that stop avr-gcc 6 from using. Consider changing
"Importance" status to blocker.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Georg-Johann Lay changed:
What|Removed |Added
CC||gigo121 at gmail dot com
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #3 from Senthil Kumar Selvaraj
---
Yeah, it's a 6.x thing. There's a commit that changes varasm.c from using
targetm.asm_out.mergeable_rodata_prefix to a function call to
targetm.asm_out.function_rodata_section hook if the section
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
Georg-Johann Lay changed:
What|Removed |Added
Keywords||wrong-code
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71151
--- Comment #1 from Senthil Kumar Selvaraj
---
A workaround is to disable constant merging (-fno-merge-constants).
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