https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110701
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89180
Bug 89180 depends on bug 101090, which changed state.
Bug 101090 Summary: incorrect -Wunused-value warning on remquo with constant
values
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101090
What|Removed |Added
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106264
--- Comment #9 from Roger Sayle ---
*** Bug 101090 has been marked as a duplicate of this bug. ***
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101090
Roger Sayle changed:
What|Removed |Added
Resolution|--- |DUPLICATE
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110587
Roger Sayle changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |roger at
nextmovesoftware dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110587
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110649
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110598
Roger Sayle changed:
What|Removed |Added
Resolution|--- |FIXED
Status|ASSIGNED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110598
Roger Sayle changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |roger at
nextmovesoftware dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110588
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91681
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned at
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110362
Roger Sayle changed:
What|Removed |Added
Component|rtl-optimization|tree-optimization
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110533
Roger Sayle changed:
What|Removed |Added
Last reconfirmed||2023-07-06
Ever confirmed|0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109973
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|NEW
Summary|[13/14
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52070
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31985
Roger Sayle changed:
What|Removed |Added
Target Milestone|--- |14.0
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78904
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88873
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109766
--- Comment #3 from Roger Sayle ---
For the record a solution was proposed at
https://gcc.gnu.org/pipermail/gcc-patches/2023-May/618197.html
but this approach failed review at
https://gcc.gnu.org/pipermail/gcc-patches/2023-May/618278.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110083
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110104
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|NEW
Assignee|roger at
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30829
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31985
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110104
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110083
--- Comment #2 from Roger Sayle ---
Created attachment 55241
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55241=edit
proposed patch
This patch fixes the problem. Bootstrap and regression tests underway.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110083
Roger Sayle changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |roger at
nextmovesoftware dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110070
Bug ID: 110070
Summary: Code quality regression with for (int i: {1,2,4,6})
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109973
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
See Also|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107812
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109840
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109840
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109766
Roger Sayle changed:
What|Removed |Added
Last reconfirmed||2023-05-08
Ever confirmed|0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109476
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Target Milestone|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105991
Roger Sayle changed:
What|Removed |Added
Status|REOPENED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109476
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95674
Roger Sayle changed:
What|Removed |Added
Resolution|--- |FIXED
Target Milestone|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19986
Bug 19986 depends on bug 25186, which changed state.
Bug 25186 Summary: (short)(((int)short_var) <<1) should be folded so that the
shift is done in the short type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25186
What|Removed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25186
Roger Sayle changed:
What|Removed |Added
Target Milestone|--- |13.0
Status|NEW
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106888
--- Comment #5 from Roger Sayle ---
Created attachment 54905
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54905=edit
proposed patch
This patch should fix this problem, by adding another pattern the machine
description to also recognize
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66511
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54816
Roger Sayle changed:
What|Removed |Added
Target Milestone|--- |13.0
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54816
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109476
--- Comment #14 from Roger Sayle ---
My apologies for the delay/issues. My bootstrap and regression testing of this
patch (on x86_64-pc-linux-gnu) revealed an issue or two (including the reported
ICE). My plan was to fix/resolve all these
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109476
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109424
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109104
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109031
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
Roger Sayle changed:
What|Removed |Added
See Also||https://gcc.gnu.org/bugzill
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103354
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109031
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #21 from Roger Sayle ---
I completely agree that Richard Sandiford's patch is a much better solution,
but I'd like to counter the claims that the change originally proposed in
comment #8 is obviously universally bad.
Segher has
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #15 from Roger Sayle ---
An example of combine's temporary lapses of sanity can be seen on powerpc:
Trying 14 -> 15:
14: %3:SI=sign_extend(r128:SI#2)*sign_extend(r127:SI#2)
REG_DEAD r128:SI
REG_DEAD r127:SI
15: use
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #14 from Roger Sayle ---
This really is a regression, that points to a previously latent/unnoticed bug
in combine.
In GCC 12, combine would take the input RTL and based on target costs transform
it into the better of implementation
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #10 from Roger Sayle ---
Status update: The x86 backend pieces of my proposed fix have been approved and
committed, but the remaining middle-end pieces have been making slow progress:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92342
Roger Sayle changed:
What|Removed |Added
Summary|[10/11/12/13 Regression] a |[10/11/12 Regression] a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71343
Roger Sayle changed:
What|Removed |Added
Status|NEW |RESOLVED
Target Milestone|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105546
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99531
Roger Sayle changed:
What|Removed |Added
Summary|[10/11/12/13 Regression]|[10/11 Regression]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107991
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106704
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108229
Roger Sayle changed:
What|Removed |Added
Resolution|--- |FIXED
Status|NEW
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92342
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108292
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108292
--- Comment #14 from Roger Sayle ---
Created attachment 54197
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54197=edit
Related optimizations to ix86_expand_int_movcc.
Just for the record, here is a related patch that I was working on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108292
--- Comment #9 from Roger Sayle ---
Another way to avoid the SCALAR_FLOAT_MODE_P problem is:
/* Add a REG_EQUAL note to allow condition to be shared. */
rtx note = gen_rtx_fmt_ee (orig_code, mode, op0, op1);
/*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108292
--- Comment #8 from Roger Sayle ---
Created attachment 54195
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54195=edit
Roger's proposed patch
Here's my proposed patch (or something close to it, it's still bootstrapping
and regression
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108292
Roger Sayle changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |roger at
nextmovesoftware dot com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100793
Roger Sayle changed:
What|Removed |Added
Last reconfirmed||2022-12-29
Ever confirmed|0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108229
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107548
Roger Sayle changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106959
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106933
Roger Sayle changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106877
Roger Sayle changed:
What|Removed |Added
Target Milestone|12.3|13.0
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107627
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172
--- Comment #47 from Roger Sayle ---
I really don't believe that using UNSPEC here is the correct way to go, but it
appears to be the (only?) approach that Segher is prepared to approve. Hohum.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
Roger Sayle changed:
What|Removed |Added
Keywords||patch
Status|ASSIGNED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172
--- Comment #6 from Roger Sayle ---
This sounds related to the discussion/patch originally proposed at
https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598040.html
and then revised (based on reviewer comments) at
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106472
Roger Sayle changed:
What|Removed |Added
Assignee|roger at nextmovesoftware dot com |unassigned at gcc dot
gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106933
--- Comment #3 from Roger Sayle ---
Ignore all of Comment 2. The reason the instruction isn't getting split, is
that (unlike the other clones), the pseudo's mode is V1TI (not TI), hence
doesn't match the constraint. The problem is STV
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106933
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106877
Roger Sayle changed:
What|Removed |Added
Status|NEW |ASSIGNED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98954
Roger Sayle changed:
What|Removed |Added
Target Milestone|--- |13.0
Status|ASSIGNED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98956
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64992
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98956
Bug 98956 depends on bug 64992, which changed state.
Bug 64992 Summary: More optimize opportunity
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64992
What|Removed |Added
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106640
Roger Sayle changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106746
--- Comment #9 from Roger Sayle ---
I'm curious why the zero_extend behaves so differently to a sign_extend,
perhaps a missing simplification or pattern. Presumably the CONCAT in the
debug_insn is there whether or not a sign_extend or
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106609
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #8 from Roger Sayle ---
Time for a status update. The PR title is a little misleading; sign-extensions
aren't really the problem, but it turns out that the equivalent zero-extensions
aren't always optimized as well as the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106640
Roger Sayle changed:
What|Removed |Added
Target Milestone|--- |13.0
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
--- Comment #3 from Roger Sayle ---
Patch proposed:
https://gcc.gnu.org/pipermail/gcc-patches/2022-August/599663.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=21137
Roger Sayle changed:
What|Removed |Added
Status|REOPENED|RESOLVED
Target Milestone|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
Roger Sayle changed:
What|Removed |Added
Component|tree-optimization |rtl-optimization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
--- Comment #5 from Roger Sayle ---
Hi Tamar,
I think this is where I need to apologize. Combine is now canonicalizing these
equivalent RTL expressions to the zero_extend form, on the assumption that zero
extension has no data dependency and
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106594
Roger Sayle changed:
What|Removed |Added
Last reconfirmed||2022-08-12
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106243
Roger Sayle changed:
What|Removed |Added
Resolution|--- |FIXED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47949
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
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