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* [Bug middle-end/61894] New: Fail to fold read from constant vector initializer @ 2014-07-24 10:34 rguenth at gcc dot gnu.org 2014-07-24 10:37 ` [Bug middle-end/61894] " rguenth at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-07-24 10:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61894 Bug ID: 61894 Summary: Fail to fold read from constant vector initializer Product: gcc Version: 4.9.1 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: rguenth at gcc dot gnu.org The following is not handled by fold_const_aggregate_ref and siblings. /* { dg-do run } */ /* { dg-options "-O" } */ extern void abort (void); /* We should fold all reads from xconstant and eliminate it, removing the reference to blah which cannot be resolved at link time. */ extern int blah; typedef int v4si __attribute__((vector_size(16))); static const struct { int *y; const v4si x[2] __attribute__((aligned(32))); } xconstant = { &blah, { { 0, 1, 2, 3 }, { 2, 3, 4, 5 } } }; int main() { if (sizeof (int) != 4) return 0; if (*(int *)&xconstant.x[0][0] != 0) abort (); if (*(int *)&xconstant.x[0][1] != 1) if (*(int *)&xconstant.x[0][2] != 2) abort (); if (*(int *)&xconstant.x[0][3] != 3) abort (); if (*(int *)&xconstant.x[1][0] != 2) abort (); if (*(int *)&xconstant.x[1][1] != 3) abort (); if (*(int *)&xconstant.x[1][2] != 4) abort (); if (*(int *)&xconstant.x[1][3] != 5) abort (); return 0; } ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/61894] Fail to fold read from constant vector initializer 2014-07-24 10:34 [Bug middle-end/61894] New: Fail to fold read from constant vector initializer rguenth at gcc dot gnu.org @ 2014-07-24 10:37 ` rguenth at gcc dot gnu.org 2014-07-24 10:37 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-07-24 10:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61894 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2014-07-24 Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Mine. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/61894] Fail to fold read from constant vector initializer 2014-07-24 10:34 [Bug middle-end/61894] New: Fail to fold read from constant vector initializer rguenth at gcc dot gnu.org 2014-07-24 10:37 ` [Bug middle-end/61894] " rguenth at gcc dot gnu.org @ 2014-07-24 10:37 ` rguenth at gcc dot gnu.org 2014-07-25 7:45 ` rguenth at gcc dot gnu.org 2014-07-25 7:46 ` rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-07-24 10:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61894 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Because fold_ctor_reference doesn't handle VECTOR_CST. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/61894] Fail to fold read from constant vector initializer 2014-07-24 10:34 [Bug middle-end/61894] New: Fail to fold read from constant vector initializer rguenth at gcc dot gnu.org 2014-07-24 10:37 ` [Bug middle-end/61894] " rguenth at gcc dot gnu.org 2014-07-24 10:37 ` rguenth at gcc dot gnu.org @ 2014-07-25 7:45 ` rguenth at gcc dot gnu.org 2014-07-25 7:46 ` rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-07-25 7:45 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61894 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Fri Jul 25 07:44:57 2014 New Revision: 213045 URL: https://gcc.gnu.org/viewcvs?rev=213045&root=gcc&view=rev Log: 2014-07-25 Richard Biener <rguenther@suse.de> PR middle-end/61762 PR middle-end/61894 * fold-const.c (native_encode_int): Add and handle offset parameter to do partial encodings of expr. (native_encode_fixed): Likewise. (native_encode_real): Likewise. (native_encode_complex): Likewise. (native_encode_vector): Likewise. (native_encode_string): Likewise. (native_encode_expr): Likewise. * fold-const.c (native_encode_expr): Add offset parameter defaulting to -1. * gimple-fold.c (fold_string_cst_ctor_reference): Remove. (fold_ctor_reference): Handle all reads from tcc_constant ctors. * gcc.dg/pr61762.c: New testcase. * gcc.dg/fold-cstring.c: Likewise. * gcc.dg/fold-cvect.c: Likewise. Added: trunk/gcc/testsuite/gcc.dg/fold-cstring.c trunk/gcc/testsuite/gcc.dg/fold-cvect.c trunk/gcc/testsuite/gcc.dg/pr61762.c Modified: trunk/gcc/ChangeLog trunk/gcc/fold-const.c trunk/gcc/fold-const.h trunk/gcc/gimple-fold.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/61894] Fail to fold read from constant vector initializer 2014-07-24 10:34 [Bug middle-end/61894] New: Fail to fold read from constant vector initializer rguenth at gcc dot gnu.org ` (2 preceding siblings ...) 2014-07-25 7:45 ` rguenth at gcc dot gnu.org @ 2014-07-25 7:46 ` rguenth at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-07-25 7:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61894 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- Fixed on trunk. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-07-25 7:46 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-07-24 10:34 [Bug middle-end/61894] New: Fail to fold read from constant vector initializer rguenth at gcc dot gnu.org 2014-07-24 10:37 ` [Bug middle-end/61894] " rguenth at gcc dot gnu.org 2014-07-24 10:37 ` rguenth at gcc dot gnu.org 2014-07-25 7:45 ` rguenth at gcc dot gnu.org 2014-07-25 7:46 ` rguenth at gcc dot gnu.org
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