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* [Bug target/115188] New: [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6
@ 2024-05-22 14:06 ebotcazou at gcc dot gnu.org
2024-05-22 14:07 ` [Bug target/115188] " rguenth at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2024-05-22 14:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115188
Bug ID: 115188
Summary: [14/15 regression] invalid Thumb assembly for atomic
store in loop on ARMv6
Product: gcc
Version: 14.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ebotcazou at gcc dot gnu.org
Target Milestone: ---
This apparently comes from the fix for PR target/111235: the following code:
int data[4];
void init (unsigned int lb, unsigned int hb)
{
for (unsigned int i = lb; i < hb; i++)
__atomic_store_4 (&data[i], 0, __ATOMIC_RELAXED);
}
yields invalid assembly when compiled with -mthumb -mcpu=cortex-m0 -O2:
t.s: Assembler messages:
t.s:35: Warning: missing operand; zero assumed
t.s:35: Error: cannot use register index with PC-relative addressing -- `str
r1,r0!'
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug target/115188] [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 2024-05-22 14:06 [Bug target/115188] New: [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 ebotcazou at gcc dot gnu.org @ 2024-05-22 14:07 ` rguenth at gcc dot gnu.org 2024-05-22 18:39 ` pinskia at gcc dot gnu.org 2024-05-23 14:22 ` wilco at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-05-22 14:07 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115188 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |arm Keywords| |wrong-code Target Milestone|--- |14.2 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/115188] [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 2024-05-22 14:06 [Bug target/115188] New: [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 ebotcazou at gcc dot gnu.org 2024-05-22 14:07 ` [Bug target/115188] " rguenth at gcc dot gnu.org @ 2024-05-22 18:39 ` pinskia at gcc dot gnu.org 2024-05-23 14:22 ` wilco at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-05-22 18:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115188 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=115153, | |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=111235 Target|arm |arm-eabi --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- At first I thought it was the same failure as PR 115153 but it is different. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/115188] [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 2024-05-22 14:06 [Bug target/115188] New: [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 ebotcazou at gcc dot gnu.org 2024-05-22 14:07 ` [Bug target/115188] " rguenth at gcc dot gnu.org 2024-05-22 18:39 ` pinskia at gcc dot gnu.org @ 2024-05-23 14:22 ` wilco at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: wilco at gcc dot gnu.org @ 2024-05-23 14:22 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115188 Wilco <wilco at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Ever confirmed|0 |1 Assignee|unassigned at gcc dot gnu.org |wilco at gcc dot gnu.org Last reconfirmed| |2024-05-23 --- Comment #2 from Wilco <wilco at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > At first I thought it was the same failure as PR 115153 but it is different. It's similar in that 'm' apparently allows LDMIA/STMIA with writeback in Thumb-1. The correct constraint is 'Uw'. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-05-23 14:22 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-05-22 14:06 [Bug target/115188] New: [14/15 regression] invalid Thumb assembly for atomic store in loop on ARMv6 ebotcazou at gcc dot gnu.org 2024-05-22 14:07 ` [Bug target/115188] " rguenth at gcc dot gnu.org 2024-05-22 18:39 ` pinskia at gcc dot gnu.org 2024-05-23 14:22 ` wilco at gcc dot gnu.org
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