https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #12 from Richard Biener ---
Author: rguenth
Date: Thu Dec 5 09:45:46 2019
New Revision: 278991
URL: https://gcc.gnu.org/viewcvs?rev=278991=gcc=rev
Log:
2019-12-05 Richard Biener
PR tree-optimization/92803
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
Richard Biener changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #10 from Jakub Jelinek ---
Another testcase to consider (-O2 -mavx2):
typedef double v4df __attribute__((vector_size (32)));
typedef double v2df __attribute__((vector_size (16)));
typedef short v16hi __attribute__((vector_size
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #9 from Richard Biener ---
Created attachment 47425
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47425=edit
my patch
testing this, the testcases optimization check likely requires some other
prerequestite from my tree.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #8 from Richard Biener ---
(In reply to Jakub Jelinek from comment #4)
> Though, there is another issue, for the nelts 2 vectors
> simplify_vector_constructor created code is actually larger than old code.
> And, it might be
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
Richard Biener changed:
What|Removed |Added
Assignee|jakub at gcc dot gnu.org |rguenth at gcc dot
gnu.org
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #6 from Richard Biener ---
Hmm, I don't think it is fully correct. Let me dig in a bit.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
Jakub Jelinek changed:
What|Removed |Added
Status|NEW |ASSIGNED
Assignee|unassigned
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #4 from Jakub Jelinek ---
Untested fix:
--- gcc/tree-ssa-forwprop.c.jj 2019-12-03 20:21:30.554464396 +0100
+++ gcc/tree-ssa-forwprop.c 2019-12-04 17:48:36.351450274 +0100
@@ -2283,11 +2283,11 @@ simplify_vector_constructor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #3 from Jakub Jelinek ---
Reduced testcase with -O2 -mavx:
typedef double v4df __attribute__((vector_size (32)));
typedef double v2df __attribute__((vector_size (16)));
v2df
foo (v4df x, double *p, v2df y)
{
return (v2df) { x[3],
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
Martin Liška changed:
What|Removed |Added
Priority|P3 |P1
Status|UNCONFIRMED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #2 from Martin Liška ---
Created attachment 47421
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47421=edit
test-case
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92803
--- Comment #1 from Martin Liška ---
Created attachment 47420
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47420=edit
test-case
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