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* [Bug tree-optimization/58526] New: Inlining looses restrict qualifier and leads to loop versioned vectorization
@ 2013-09-25 8:20 burnus at gcc dot gnu.org
2013-09-25 9:57 ` [Bug tree-optimization/58526] " rguenth at gcc dot gnu.org
2014-09-03 14:07 ` burnus at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: burnus at gcc dot gnu.org @ 2013-09-25 8:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58526
Bug ID: 58526
Summary: Inlining looses restrict qualifier and leads to loop
versioned vectorization
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
Created attachment 30892
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30892&action=edit
C++ test case
The attached test case vectorizes without loop versioning when compiled with
-fno-inline.
Expected: Also with inlining, the restrict qualifier survives and is used in
alias analysis - such that no loop versioning is done. (That's also what one
gets with Intel's icpc 13.1.1.)
g++ -march=native -funroll-loops -fno-rtti -fno-exceptions -Ofast -std=c++11 -S
-fopt-info-optall-optimized test3.cc
test3.cc:16:3: note: loop vectorized
test3.cc:16:3: note: loop versioned for vectorization because of possible
aliasing
test3.cc:16:3: note: loop with 3 iterations completely unrolled
test3.cc:16:3: note: loop unrolled 7 times
test3.cc:17:34: note: loop unrolled 7 times
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/58526] Inlining looses restrict qualifier and leads to loop versioned vectorization
2013-09-25 8:20 [Bug tree-optimization/58526] New: Inlining looses restrict qualifier and leads to loop versioned vectorization burnus at gcc dot gnu.org
@ 2013-09-25 9:57 ` rguenth at gcc dot gnu.org
2014-09-03 14:07 ` burnus at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-09-25 9:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58526
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-09-25
CC| |matz at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Should be fixable with the restrict tag idea. Which someone needs
to pick up.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/58526] Inlining looses restrict qualifier and leads to loop versioned vectorization
2013-09-25 8:20 [Bug tree-optimization/58526] New: Inlining looses restrict qualifier and leads to loop versioned vectorization burnus at gcc dot gnu.org
2013-09-25 9:57 ` [Bug tree-optimization/58526] " rguenth at gcc dot gnu.org
@ 2014-09-03 14:07 ` burnus at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: burnus at gcc dot gnu.org @ 2014-09-03 14:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58526
--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
See also RFC patch at https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00232.html
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-09-25 8:20 [Bug tree-optimization/58526] New: Inlining looses restrict qualifier and leads to loop versioned vectorization burnus at gcc dot gnu.org
2013-09-25 9:57 ` [Bug tree-optimization/58526] " rguenth at gcc dot gnu.org
2014-09-03 14:07 ` burnus at gcc dot gnu.org
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