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* [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers
@ 2020-10-15 9:47 krebbel at gcc dot gnu.org
2020-10-15 9:48 ` [Bug rtl-optimization/97439] " krebbel at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: krebbel at gcc dot gnu.org @ 2020-10-15 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
Bug ID: 97439
Summary: Wrong min value generated for DFP numbers
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: krebbel at gcc dot gnu.org
Target Milestone: ---
Created attachment 49374
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49374&action=edit
Testcase
The attached testcase aborts on IBM Z when compiled with:
gcc -O1 t.c -o t
commit id: c1c62aec6751
The x > -Inf comparison is folded by match.pd to x >= DFP128 MIN
However the sign bit is lost when generating DFP128 MIN in decimal_real_maxval
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
@ 2020-10-15 9:48 ` krebbel at gcc dot gnu.org
2020-10-15 12:05 ` rguenth at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: krebbel at gcc dot gnu.org @ 2020-10-15 9:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 49375
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49375&action=edit
Fix
decimal_real_maxval misses to set the sign flag in the REAL_VALUE_TYPE.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
2020-10-15 9:48 ` [Bug rtl-optimization/97439] " krebbel at gcc dot gnu.org
@ 2020-10-15 12:05 ` rguenth at gcc dot gnu.org
2020-10-22 10:39 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-10-15 12:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK for all branches.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
2020-10-15 9:48 ` [Bug rtl-optimization/97439] " krebbel at gcc dot gnu.org
2020-10-15 12:05 ` rguenth at gcc dot gnu.org
@ 2020-10-22 10:39 ` cvs-commit at gcc dot gnu.org
2020-10-22 10:42 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-10-22 10:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andreas Krebbel <krebbel@gcc.gnu.org>:
https://gcc.gnu.org/g:e3f25eac67aee77af0b2038cd4d6cbd36d7f1030
commit r11-4223-ge3f25eac67aee77af0b2038cd4d6cbd36d7f1030
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date: Thu Oct 22 12:24:22 2020 +0200
Fix PR97439
decimal_real_maxval misses to set the sign flag in the REAL_VALUE_TYPE.
gcc/ChangeLog:
PR rtl-optimization/97439
* dfp.c (decimal_real_maxval): Set the sign flag in the
generated number.
gcc/testsuite/ChangeLog:
* gcc.dg/dfp/pr97439.c: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
` (2 preceding siblings ...)
2020-10-22 10:39 ` cvs-commit at gcc dot gnu.org
@ 2020-10-22 10:42 ` cvs-commit at gcc dot gnu.org
2020-10-22 10:43 ` cvs-commit at gcc dot gnu.org
2020-10-22 10:44 ` cvs-commit at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-10-22 10:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Andreas Krebbel
<krebbel@gcc.gnu.org>:
https://gcc.gnu.org/g:523e6e5bd47bcc03e9782039b52fb3f8b3276e64
commit r10-8937-g523e6e5bd47bcc03e9782039b52fb3f8b3276e64
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date: Thu Oct 22 12:24:22 2020 +0200
Fix PR97439
decimal_real_maxval misses to set the sign flag in the REAL_VALUE_TYPE.
gcc/ChangeLog:
PR rtl-optimization/97439
* dfp.c (decimal_real_maxval): Set the sign flag in the
generated number.
gcc/testsuite/ChangeLog:
* gcc.dg/dfp/pr97439.c: New test.
(cherry picked from commit e3f25eac67aee77af0b2038cd4d6cbd36d7f1030)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
` (3 preceding siblings ...)
2020-10-22 10:42 ` cvs-commit at gcc dot gnu.org
@ 2020-10-22 10:43 ` cvs-commit at gcc dot gnu.org
2020-10-22 10:44 ` cvs-commit at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-10-22 10:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Andreas Krebbel
<krebbel@gcc.gnu.org>:
https://gcc.gnu.org/g:a07af7753004e711d0db8d4e5620a4e8afc8f10c
commit r9-9007-ga07af7753004e711d0db8d4e5620a4e8afc8f10c
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date: Thu Oct 22 12:24:22 2020 +0200
Fix PR97439
decimal_real_maxval misses to set the sign flag in the REAL_VALUE_TYPE.
gcc/ChangeLog:
PR rtl-optimization/97439
* dfp.c (decimal_real_maxval): Set the sign flag in the
generated number.
gcc/testsuite/ChangeLog:
* gcc.dg/dfp/pr97439.c: New test.
(cherry picked from commit e3f25eac67aee77af0b2038cd4d6cbd36d7f1030)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/97439] Wrong min value generated for DFP numbers
2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
` (4 preceding siblings ...)
2020-10-22 10:43 ` cvs-commit at gcc dot gnu.org
@ 2020-10-22 10:44 ` cvs-commit at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-10-22 10:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97439
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-8 branch has been updated by Andreas Krebbel
<krebbel@gcc.gnu.org>:
https://gcc.gnu.org/g:2819cdd8ff8e15ed5efb4095143cf531cf3e50f9
commit r8-10593-g2819cdd8ff8e15ed5efb4095143cf531cf3e50f9
Author: Andreas Krebbel <krebbel@linux.ibm.com>
Date: Thu Oct 22 12:24:22 2020 +0200
Fix PR97439
decimal_real_maxval misses to set the sign flag in the REAL_VALUE_TYPE.
gcc/ChangeLog:
PR rtl-optimization/97439
* dfp.c (decimal_real_maxval): Set the sign flag in the
generated number.
gcc/testsuite/ChangeLog:
* gcc.dg/dfp/pr97439.c: New test.
(cherry picked from commit e3f25eac67aee77af0b2038cd4d6cbd36d7f1030)
^ permalink raw reply [flat|nested] 7+ messages in thread
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2020-10-15 9:47 [Bug rtl-optimization/97439] New: Wrong min value generated for DFP numbers krebbel at gcc dot gnu.org
2020-10-15 9:48 ` [Bug rtl-optimization/97439] " krebbel at gcc dot gnu.org
2020-10-15 12:05 ` rguenth at gcc dot gnu.org
2020-10-22 10:39 ` cvs-commit at gcc dot gnu.org
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