* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
@ 2023-05-04 1:55 ` sjames at gcc dot gnu.org
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From: sjames at gcc dot gnu.org @ 2023-05-04 1:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
Sam James <sjames at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog,
| |memory-hog
--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
Reverting it on the branch makes compile succeed within about a second.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
2023-05-04 1:55 ` [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699 sjames at gcc dot gnu.org
@ 2023-05-04 2:07 ` sjames at gcc dot gnu.org
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From: sjames at gcc dot gnu.org @ 2023-05-04 2:07 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
I'm going to try reduce this with a timeout of ~3s or so and pray, but please
tell me if you have a better idea to help speed it up.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
2023-05-04 1:55 ` [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699 sjames at gcc dot gnu.org
2023-05-04 2:07 ` sjames at gcc dot gnu.org
@ 2023-05-04 3:11 ` sjames at gcc dot gnu.org
2023-05-04 6:20 ` rguenth at gcc dot gnu.org
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From: sjames at gcc dot gnu.org @ 2023-05-04 3:11 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
Created attachment 54989
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54989&action=edit
reduced.ii
This reduced version seems to exhibit the same behaviour but please verify.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2023-05-04 6:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
Status|UNCONFIRMED |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |10.5
Ever confirmed|0 |1
Last reconfirmed| |2023-05-04
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Huh, interesting.
Did you by chance verify if GCC 11, 12 or 13 are affected similarly?
I wonder if we can bisect what fixed it if not.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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From: sjames at gcc dot gnu.org @ 2023-05-04 6:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
Sam James <sjames at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #5 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #4)
> Did you by chance verify if GCC 11, 12 or 13 are affected similarly?
releases/{11,12,13} are fine.
> I wonder if we can bisect what fixed it if not.
The 11.1 and 12.1 tags are fine too.
I'm worried that it didn't ever exist on trunk and is a combination of
backports manifesting badly.
I don't remember it happening on any of the branches either, and given how
common a package qtwebengine is, I'm confident we would've noticed if it
manifested on any of the release/* branches for an extended period at least.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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To: gcc-bugs
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
I checked 11 and 12 and they are not affected. We run in circles through
valueize_refs_1 in vn_reference_maybe_forwprop_address, repeatedly picking up
_24 = &MEM <const struct SkDCubic> [(const struct SkDPoint
&)iftmp.77_74].fPts[idx2_62].fX;
where the available definition for the value if iftmp.77_74 is _24.
We have
<bb 70> [local count: 224314031]:
_24 = &MEM <const struct SkDCubic> [(const struct SkDPoint
&)iftmp.77_74].fPts[idx2_62].fX;
_259 = minX;
_260 = MEM <const struct SkDCubic> [(const double
&)iftmp.77_74].fPts[idx2_62].fX;
and the def of _74 is
iftmp.77_74 = PHI <iftmp.77_178(64), iftmp.77_177(65)>
_177 is
iftmp.77_177 = &this_93(D)->fPart.fCurve;
abd _62 is value-numbered to zero. But since on the 10 branch we have
get_addr_base_and_unit_offset without valueization we likely do not
notice the address doesn't actually change.
Backporting r11-199-g2b42509f8b7bdf fixes this issue (well, it avoids it).
I'm not 100% sure it doesn't just make the issue latent.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The real issue is probably that when value-numbering
Value numbering stmt = iftmp.77_74 = PHI <iftmp.77_178(64), iftmp.77_177(65)>
Setting value number of iftmp.77_74 to iftmp.77_177 (changed)
iftmp.77_177 is available for iftmp.77_177
we have _177 available but for
Value numbering stmt = _24 = &MEM <const struct SkDCubic> [(const struct
SkDPoint &)iftmp.77_74].fPts[idx2_62].fX;
Setting value number of _24 to iftmp.77_177 (changed)
Making available beyond BB70 _24 for value iftmp.77_177
we appearantly have not, despite the _74 def dominating this stmt. Of course
that's an inherent limitation of the dominated_by_p_w_unex tool that was
patched with the offending revision.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
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From: rguenth at gcc dot gnu.org @ 2023-05-04 7:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm reducing a testcase and will revert the backport that caused this. That
should be the least risky.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2023-05-04 7:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reduced testcase. I've reduced with
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index 666d7061aa8..31879fb761b 100644
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -1558,6 +1558,7 @@ valueize_refs_1 (vec<vn_reference_op_s> *orig, bool
*value
ized_anything,
{
vn_reference_op_t vro;
unsigned int i;
+ auto_bitmap visited;
*valueized_anything = false;
@@ -1609,8 +1610,12 @@ valueize_refs_1 (vec<vn_reference_op_s> *orig, bool
*valueized_anything,
&& vro->opcode == SSA_NAME
&& (*orig)[i - 1].opcode == MEM_REF)
{
+ tree name = vro->op0;
if (vn_reference_maybe_forwprop_address (orig, &i))
- *valueized_anything = true;
+ {
+ *valueized_anything = true;
+ gcc_assert (bitmap_set_bit (visited, SSA_NAME_VERSION (name)));
+ }
}
/* If it transforms a non-constant ARRAY_REF into a constant
one, adjust the constant offset. */
--
double &SkTMax(double &a, double &b) { return a ?: b; }
struct SkDPoint {
double fX;
};
struct SkDCubic {
SkDPoint &operator[](int n) { return fPts[n]; }
SkDPoint fPts[4];
};
struct SkDCurve {
SkDCubic fCubic;
SkDPoint &operator[](int n) { return fCubic[n]; }
};
struct SkDCurveSweep {
SkDCurve fCurve;
};
int endsIntersect_rPts;
double endsIntersect_maxX;
struct SkOpAngle {
void endsIntersect();
SkDCurveSweep fPart;
} endsIntersect_rh;
void SkOpAngle::endsIntersect() {
for (int index = 0;; ++index) {
SkDCurve &curve = index ? endsIntersect_rh.fPart.fCurve : fPart.fCurve;
for (int idx2 = 0; endsIntersect_rPts; ++idx2) {
SkDPoint &__trans_tmp_1 = curve[idx2];
endsIntersect_maxX = SkTMax(endsIntersect_maxX, __trans_tmp_1.fX);
}
}
}
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2023-05-04 7:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:ee99aaae4aeecd55f1d945a959652cf07e3b2e9e
commit r14-470-gee99aaae4aeecd55f1d945a959652cf07e3b2e9e
Author: Richard Biener <rguenther@suse.de>
Date: Thu May 4 09:41:33 2023 +0200
tree-optimization/109724 - new testcase
The following adds a testcase for PR109724 which was caused by
backporting r13-2375-gbe1b42de9c151d and fixed by r11-199-g2b42509f8b7bdf.
PR tree-optimization/109724
* g++.dg/torture/pr109724.C: New testcase.
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
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To: gcc-bugs
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--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:de45793d0a102fc71785b90ce9ce75e57878da5d
commit r13-7293-gde45793d0a102fc71785b90ce9ce75e57878da5d
Author: Richard Biener <rguenther@suse.de>
Date: Thu May 4 09:41:33 2023 +0200
tree-optimization/109724 - new testcase
The following adds a testcase for PR109724 which was caused by
backporting r13-2375-gbe1b42de9c151d and fixed by r11-199-g2b42509f8b7bdf.
PR tree-optimization/109724
* g++.dg/torture/pr109724.C: New testcase.
(cherry picked from commit ee99aaae4aeecd55f1d945a959652cf07e3b2e9e)
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
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To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:9945e5f0e705588eada3ae26bb2168124c88461a
commit r12-9510-g9945e5f0e705588eada3ae26bb2168124c88461a
Author: Richard Biener <rguenther@suse.de>
Date: Thu May 4 09:41:33 2023 +0200
tree-optimization/109724 - new testcase
The following adds a testcase for PR109724 which was caused by
backporting r13-2375-gbe1b42de9c151d and fixed by r11-199-g2b42509f8b7bdf.
PR tree-optimization/109724
* g++.dg/torture/pr109724.C: New testcase.
(cherry picked from commit ee99aaae4aeecd55f1d945a959652cf07e3b2e9e)
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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@ 2023-05-04 7:47 ` cvs-commit at gcc dot gnu.org
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To: gcc-bugs
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--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:7d7e2d67bfd316125d7344bc713396ecab2ac3df
commit r11-10744-g7d7e2d67bfd316125d7344bc713396ecab2ac3df
Author: Richard Biener <rguenther@suse.de>
Date: Thu May 4 09:41:33 2023 +0200
tree-optimization/109724 - new testcase
The following adds a testcase for PR109724 which was caused by
backporting r13-2375-gbe1b42de9c151d and fixed by r11-199-g2b42509f8b7bdf.
PR tree-optimization/109724
* g++.dg/torture/pr109724.C: New testcase.
(cherry picked from commit ee99aaae4aeecd55f1d945a959652cf07e3b2e9e)
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
2023-05-04 1:53 [Bug c++/109724] New: [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp sjames at gcc dot gnu.org
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From: cvs-commit at gcc dot gnu.org @ 2023-05-04 7:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:946dc2eb7aeb1f3bf0085975a7325941acfb978f
commit r10-11392-g946dc2eb7aeb1f3bf0085975a7325941acfb978f
Author: Richard Biener <rguenther@suse.de>
Date: Thu May 4 09:41:33 2023 +0200
tree-optimization/109724 - new testcase
The following adds a testcase for PR109724 which was caused by
backporting r13-2375-gbe1b42de9c151d and fixed by r11-199-g2b42509f8b7bdf.
PR tree-optimization/109724
* g++.dg/torture/pr109724.C: New testcase.
(cherry picked from commit ee99aaae4aeecd55f1d945a959652cf07e3b2e9e)
^ permalink raw reply [flat|nested] 16+ messages in thread* [Bug c++/109724] [10 regression] Huge memory usage when building qtwebengine's SkOpAngle.cpp since r10-11201-g051f78a5c1d699
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@ 2023-05-04 7:48 ` rguenth at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2023-05-04 7:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109724
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have reverted the offending commit. Many thanks for the report.
^ permalink raw reply [flat|nested] 16+ messages in thread