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* [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c @ 2024-05-15 8:20 liuhongt at gcc dot gnu.org 2024-05-15 10:10 ` [Bug tree-optimization/115101] " rguenth at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: liuhongt at gcc dot gnu.org @ 2024-05-15 8:20 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115101 Bug ID: 115101 Summary: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c Product: gcc Version: 15.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: liuhongt at gcc dot gnu.org Target Milestone: --- When I'm working on turning cunrolli, I found if cunrollis is disabled, the testcase will fail. It can be reproduced with trunk for -O1 -floop-nest-optimize. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/115101] [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c 2024-05-15 8:20 [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c liuhongt at gcc dot gnu.org @ 2024-05-15 10:10 ` rguenth at gcc dot gnu.org 2024-05-16 2:04 ` [Bug tree-optimization/115101] [11/12/13/14/15 regression] " sjames at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-05-15 10:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115101 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rguenth at gcc dot gnu.org Last reconfirmed| |2024-05-15 Status|UNCONFIRMED |NEW Component|middle-end |tree-optimization Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. [scheduler] original ast: for (int c0 = 0; c0 <= 3; c0 += 1) for (int c1 = 0; c1 <= 3; c1 += 1) { for (int c2 = 0; c2 <= 3; c2 += 1) { for (int c3 = 0; c3 <= 1; c3 += 1) S_3(c0, c1, c2, c3); S_21(c0, c1, c2); } for (int c2 = 0; c2 <= 1; c2 += 1) for (int c5 = 0; c5 <= 3; c5 += 1) S_6(c0, c1, c5, c2); for (int c2 = 0; c2 <= 3; c2 += 1) S_23(c0, c1, c2); } shows something goes wrong translating the sibling loop or the original AST shown is in fact a transformed one already. The transformed shown shows an extra interchange: [scheduler] AST generated by isl: for (int c0 = 0; c0 <= 3; c0 += 1) for (int c1 = 0; c1 <= 3; c1 += 1) { for (int c2 = 0; c2 <= 3; c2 += 1) { for (int c3 = 0; c3 <= 1; c3 += 1) S_3(c0, c1, c2, c3); S_21(c0, c1, c2); } for (int c4 = 0; c4 <= 3; c4 += 1) for (int c5 = 0; c5 <= 1; c5 += 1) S_6(c0, c1, c4, c5); for (int c2 = 0; c2 <= 3; c2 += 1) S_23(c0, c1, c2); } but the distribution of the sibling for (i...) loop looks confused already. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/115101] [11/12/13/14/15 regression] [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c 2024-05-15 8:20 [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c liuhongt at gcc dot gnu.org 2024-05-15 10:10 ` [Bug tree-optimization/115101] " rguenth at gcc dot gnu.org @ 2024-05-16 2:04 ` sjames at gcc dot gnu.org 2024-05-16 6:23 ` rguenth at gcc dot gnu.org 2024-07-19 13:25 ` [Bug tree-optimization/115101] [12/13/14/15 " rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: sjames at gcc dot gnu.org @ 2024-05-16 2:04 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115101 Sam James <sjames at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[wrong code] with -O1 |[11/12/13/14/15 regression] |-floop-nest-optimize for |[wrong code] with -O1 |gcc.dg/graphite/interchange |-floop-nest-optimize for |-8.c |gcc.dg/graphite/interchange | |-8.c Known to work| |5.4.0 Known to fail| |6.1.0 CC| |sjames at gcc dot gnu.org --- Comment #2 from Sam James <sjames at gcc dot gnu.org> --- on godbolt, it looks like gcc-5.4 is fine, and 6.1 isn't ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/115101] [11/12/13/14/15 regression] [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c 2024-05-15 8:20 [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c liuhongt at gcc dot gnu.org 2024-05-15 10:10 ` [Bug tree-optimization/115101] " rguenth at gcc dot gnu.org 2024-05-16 2:04 ` [Bug tree-optimization/115101] [11/12/13/14/15 regression] " sjames at gcc dot gnu.org @ 2024-05-16 6:23 ` rguenth at gcc dot gnu.org 2024-07-19 13:25 ` [Bug tree-optimization/115101] [12/13/14/15 " rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-05-16 6:23 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115101 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |11.5 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/115101] [12/13/14/15 regression] [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c 2024-05-15 8:20 [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c liuhongt at gcc dot gnu.org ` (2 preceding siblings ...) 2024-05-16 6:23 ` rguenth at gcc dot gnu.org @ 2024-07-19 13:25 ` rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2024-07-19 13:25 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115101 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|11.5 |12.5 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- GCC 11 branch is being closed. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-07-19 13:25 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2024-05-15 8:20 [Bug middle-end/115101] New: [wrong code] with -O1 -floop-nest-optimize for gcc.dg/graphite/interchange-8.c liuhongt at gcc dot gnu.org 2024-05-15 10:10 ` [Bug tree-optimization/115101] " rguenth at gcc dot gnu.org 2024-05-16 2:04 ` [Bug tree-optimization/115101] [11/12/13/14/15 regression] " sjames at gcc dot gnu.org 2024-05-16 6:23 ` rguenth at gcc dot gnu.org 2024-07-19 13:25 ` [Bug tree-optimization/115101] [12/13/14/15 " rguenth at gcc dot gnu.org
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