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* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> @ 2020-10-19 10:05 ` asolokha at gmx dot com 2020-10-19 12:16 ` rguenth at gcc dot gnu.org ` (5 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: asolokha at gmx dot com @ 2020-10-19 10:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 Arseny Solokha <asolokha at gmx dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |asolokha at gmx dot com --- Comment #27 from Arseny Solokha <asolokha at gmx dot com> --- Is it still an issue? ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> 2020-10-19 10:05 ` [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization asolokha at gmx dot com @ 2020-10-19 12:16 ` rguenth at gcc dot gnu.org 2020-10-19 12:39 ` rguenth at gcc dot gnu.org ` (4 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-10-19 12:16 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 --- Comment #28 from Richard Biener <rguenth at gcc dot gnu.org> --- Yes, the original issue is still present. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> 2020-10-19 10:05 ` [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization asolokha at gmx dot com 2020-10-19 12:16 ` rguenth at gcc dot gnu.org @ 2020-10-19 12:39 ` rguenth at gcc dot gnu.org 2020-10-19 15:37 ` rguenth at gcc dot gnu.org ` (3 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-10-19 12:39 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 --- Comment #29 from Richard Biener <rguenth at gcc dot gnu.org> --- So a testcase for missed outer loop induction SLP (and nested cycle SLP) is for example int a[1024]; void foo (unsigned n) { for (int i = 0; i < 1020; i += 4) { int suma = a[i]; int sumb = a[i+1]; int sumc = a[i+2]; int sumd = a[i+3]; for (unsigned j = 0; j < 17; ++j) { suma = (suma ^ i) + 1; sumb = (sumb ^ i) + 2; sumc = (sumc ^ i) + 3; sumd = (sumd ^ i) + 4; } a[i] = suma; a[i+1] = sumb; a[i+2] = sumc; a[i+3] = sumd; } } ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> ` (2 preceding siblings ...) 2020-10-19 12:39 ` rguenth at gcc dot gnu.org @ 2020-10-19 15:37 ` rguenth at gcc dot gnu.org 2020-10-27 11:52 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 6 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-10-19 15:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 --- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #29) > So a testcase for missed outer loop induction SLP (and nested cycle SLP) is > for example > > int a[1024]; > void foo (unsigned n) > { > for (int i = 0; i < 1020; i += 4) > { > int suma = a[i]; > int sumb = a[i+1]; > int sumc = a[i+2]; > int sumd = a[i+3]; > for (unsigned j = 0; j < 17; ++j) > { > suma = (suma ^ i) + 1; > sumb = (sumb ^ i) + 2; > sumc = (sumc ^ i) + 3; > sumd = (sumd ^ i) + 4; > } > a[i] = suma; > a[i+1] = sumb; > a[i+2] = sumc; > a[i+3] = sumd; > } > } Actually this is still not an inner loop induction in outer loop vectorization. But missed nested cycle SLP handling. I have a patch for this in testing. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> ` (3 preceding siblings ...) 2020-10-19 15:37 ` rguenth at gcc dot gnu.org @ 2020-10-27 11:52 ` rguenth at gcc dot gnu.org 2020-11-03 12:33 ` cvs-commit at gcc dot gnu.org 2020-11-03 12:41 ` rguenth at gcc dot gnu.org 6 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-10-27 11:52 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 --- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> --- The following is a testcase triggering the /* FORNOW: outer loop induction with SLP not supported. */ if (STMT_SLP_TYPE (stmt_info)) return false; test: double image[40]; void foo (void) { for (int i = 0; i < 20; i++) { double suma = 0; double sumb = 0; for (int j = 0; j < 40; j++) { suma += j+i; sumb += j+i; } image[2*i] = suma; image[2*i+1] = sumb; } } ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> ` (4 preceding siblings ...) 2020-10-27 11:52 ` rguenth at gcc dot gnu.org @ 2020-11-03 12:33 ` cvs-commit at gcc dot gnu.org 2020-11-03 12:41 ` rguenth at gcc dot gnu.org 6 siblings, 0 replies; 7+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2020-11-03 12:33 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 --- Comment #32 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:ac6affba97130bcbffb21bd9f8ca53c7aac89551 commit r11-4652-gac6affba97130bcbffb21bd9f8ca53c7aac89551 Author: Richard Biener <rguenther@suse.de> Date: Tue Nov 3 11:52:47 2020 +0100 tree-optimization/80928 - SLP vectorize nested loop induction This adds SLP vectorization of nested inductions. 2020-11-03 Richard Biener <rguenther@suse.de> PR tree-optimization/80928 * tree-vect-loop.c (vectorizable_induction): SLP vectorize nested inductions. * gcc.dg/vect/vect-outer-slp-2.c: New testcase. * gcc.dg/vect/vect-outer-slp-3.c: Likewise. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/> ` (5 preceding siblings ...) 2020-11-03 12:33 ` cvs-commit at gcc dot gnu.org @ 2020-11-03 12:41 ` rguenth at gcc dot gnu.org 6 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-11-03 12:41 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #33 from Richard Biener <rguenth at gcc dot gnu.org> --- Now fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
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2020-10-19 10:05 ` [Bug tree-optimization/80928] SLP vectorization does not handle induction in outer loop vectorization asolokha at gmx dot com
2020-10-19 12:16 ` rguenth at gcc dot gnu.org
2020-10-19 12:39 ` rguenth at gcc dot gnu.org
2020-10-19 15:37 ` rguenth at gcc dot gnu.org
2020-10-27 11:52 ` rguenth at gcc dot gnu.org
2020-11-03 12:33 ` cvs-commit at gcc dot gnu.org
2020-11-03 12:41 ` rguenth at gcc dot gnu.org
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