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* [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component @ 2021-03-28 16:16 simon at pushface dot org 2021-03-29 7:39 ` [Bug ada/99802] " rguenth at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: simon at pushface dot org @ 2021-03-28 16:16 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Bug ID: 99802 Summary: [11 regression] Assignment of aggregate done component-by-component Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: ada Assignee: unassigned at gcc dot gnu.org Reporter: simon at pushface dot org Target Milestone: --- Created attachment 50481 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50481&action=edit Demonstrator, with output assembler In arm-eabi-gcc version 11.0.1 20210303 (experimental) (GCC), assigning an aggregate to a memory-mapped register is performed by assigning the components of the aggregate one-by-one to the register rather than as a whole word. The same bug is present in the x86_64-apple-darwin compiler. In compiler releases up to & including 10, this was done using a whole-word assignment. with ATSAM3X8E; use ATSAM3X8E; with ATSAM3X8E.PMC; use ATSAM3X8E.PMC; procedure Clock is begin PMC_Periph.CKGR_MOR := (KEY => 16#37#, MOSCXTEN => 1, -- main crystal oscillator enable MOSCRCEN => 1, -- main on-chip rc osc. enable MOSCXTST => 8, -- startup time others => <>); end Clock; The register is a component of a record: type PMC_Peripheral is record ... CKGR_MOR : aliased CKGR_MOR_Register; pragma Volatile_Full_Access (CKGR_MOR); ... end record with Volatile; with object as so: PMC_Periph : aliased PMC_Peripheral with Import, Address => PMC_Base; and the write respects the Volatile_Full_Access *as it writes each component separately to the register*! This fails, in this case, because the PMC hardware requires each write to this register to be accompanied by a valid value of the KEY field. The attached aggregate_assignment.zip contains Ada source, and the 10.1.0 and 11.0.1 versions of the arm-eabi cortex-m3 assembler output by -S. I've tried compiling the source in aggregate_assignment.zip with the x86_64-apple-darwin compiler, and the same bug seems to be present. NOTE, this bug is also present in GNAT CE 2020. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] Assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org @ 2021-03-29 7:39 ` rguenth at gcc dot gnu.org 2021-03-29 16:58 ` jakub at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2021-03-29 7:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Target Milestone|--- |11.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] Assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org 2021-03-29 7:39 ` [Bug ada/99802] " rguenth at gcc dot gnu.org @ 2021-03-29 16:58 ` jakub at gcc dot gnu.org 2021-03-29 17:32 ` ebotcazou at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: jakub at gcc dot gnu.org @ 2021-03-29 16:58 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ebotcazou at gcc dot gnu.org, | |jakub at gcc dot gnu.org Priority|P3 |P4 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] Assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org 2021-03-29 7:39 ` [Bug ada/99802] " rguenth at gcc dot gnu.org 2021-03-29 16:58 ` jakub at gcc dot gnu.org @ 2021-03-29 17:32 ` ebotcazou at gcc dot gnu.org 2021-03-29 17:32 ` [Bug ada/99802] [11 regression] assignment " ebotcazou at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: ebotcazou at gcc dot gnu.org @ 2021-03-29 17:32 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2021-03-29 Ever confirmed|0 |1 --- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Confirmed, this was working by chance before. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org ` (2 preceding siblings ...) 2021-03-29 17:32 ` ebotcazou at gcc dot gnu.org @ 2021-03-29 17:32 ` ebotcazou at gcc dot gnu.org 2021-03-29 22:46 ` cvs-commit at gcc dot gnu.org 2021-03-29 22:47 ` ebotcazou at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: ebotcazou at gcc dot gnu.org @ 2021-03-29 17:32 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[11 regression] Assignment |[11 regression] assignment |of aggregate done |of aggregate done |component-by-component |component-by-component Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Fixing. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org ` (3 preceding siblings ...) 2021-03-29 17:32 ` [Bug ada/99802] [11 regression] assignment " ebotcazou at gcc dot gnu.org @ 2021-03-29 22:46 ` cvs-commit at gcc dot gnu.org 2021-03-29 22:47 ` ebotcazou at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2021-03-29 22:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 --- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Eric Botcazou <ebotcazou@gcc.gnu.org>: https://gcc.gnu.org/g:471babd88668dbe4f9ff4dba6d2036ecef09653b commit r11-7900-g471babd88668dbe4f9ff4dba6d2036ecef09653b Author: Eric Botcazou <ebotcazou@adacore.com> Date: Tue Mar 30 00:41:46 2021 +0200 Fix wrong assignment of aggregate to full-access component This is a regression present on the mainline: the compiler (front-end) fails to assign an aggregate to a full-access component (i.e. Atomic or VFA) as a whole if the type of the component is not full access itself. gcc/ada/ PR ada/99802 * freeze.adb (Is_Full_Access_Aggregate): Call Is_Full_Access_Object on the name of an N_Assignment_Statement to spot full access. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug ada/99802] [11 regression] assignment of aggregate done component-by-component 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org ` (4 preceding siblings ...) 2021-03-29 22:46 ` cvs-commit at gcc dot gnu.org @ 2021-03-29 22:47 ` ebotcazou at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: ebotcazou at gcc dot gnu.org @ 2021-03-29 22:47 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99802 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- Thanks for reporting the problem. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2021-03-29 22:47 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-03-28 16:16 [Bug ada/99802] New: [11 regression] Assignment of aggregate done component-by-component simon at pushface dot org 2021-03-29 7:39 ` [Bug ada/99802] " rguenth at gcc dot gnu.org 2021-03-29 16:58 ` jakub at gcc dot gnu.org 2021-03-29 17:32 ` ebotcazou at gcc dot gnu.org 2021-03-29 17:32 ` [Bug ada/99802] [11 regression] assignment " ebotcazou at gcc dot gnu.org 2021-03-29 22:46 ` cvs-commit at gcc dot gnu.org 2021-03-29 22:47 ` ebotcazou at gcc dot gnu.org
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