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* [Bug tree-optimization/42833] New: SRA miscompiles qemu @ 2010-01-21 16:55 rth at gcc dot gnu dot org 2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: rth at gcc dot gnu dot org @ 2010-01-21 16:55 UTC (permalink / raw) To: gcc-bugs The reduced test case compiles down to xor %eax,%eax ret which comes from an invalid transformation in .030t.esra conv_u.v = vdest; res_115 = conv_u.i; -> D.2888_153 = VIEW_CONVERT_EXPR<uint32_t>(vdest); vdest.v1 = vdest$v1_154; vdest.v2 = vdest$v2_152; vdest.v3 = vdest$v3_151; vdest.v4 = vdest$v4_150; conv_u$i_171 = D.2888_153; Note in particular that the components of vdest are stored after we've done the view_convert. -- Summary: SRA miscompiles qemu Product: gcc Version: 4.5.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: rth at gcc dot gnu dot org GCC target triplet: x86_64-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] SRA miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org @ 2010-01-21 16:57 ` rth at gcc dot gnu dot org 2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu dot org @ 2010-01-21 16:57 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from rth at gcc dot gnu dot org 2010-01-21 16:56 ------- Created an attachment (id=19683) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19683&action=view) test case -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org 2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org @ 2010-01-21 19:51 ` pinskia at gcc dot gnu dot org 2010-01-21 20:29 ` rth at gcc dot gnu dot org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu dot org @ 2010-01-21 19:51 UTC (permalink / raw) To: gcc-bugs -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pinskia at gcc dot gnu dot | |org Target Milestone|--- |4.5.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org 2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org 2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org @ 2010-01-21 20:29 ` rth at gcc dot gnu dot org 2010-01-21 20:29 ` rth at gcc dot gnu dot org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu dot org @ 2010-01-21 20:29 UTC (permalink / raw) To: gcc-bugs -- rth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org ` (2 preceding siblings ...) 2010-01-21 20:29 ` rth at gcc dot gnu dot org @ 2010-01-21 20:29 ` rth at gcc dot gnu dot org 2010-01-22 18:52 ` rth at gcc dot gnu dot org 2010-01-22 23:54 ` rguenth at gcc dot gnu dot org 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu dot org @ 2010-01-21 20:29 UTC (permalink / raw) To: gcc-bugs -- rth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |rth at gcc dot gnu dot org |dot org | Status|UNCONFIRMED |ASSIGNED Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2010-01-21 20:29:09 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org ` (3 preceding siblings ...) 2010-01-21 20:29 ` rth at gcc dot gnu dot org @ 2010-01-22 18:52 ` rth at gcc dot gnu dot org 2010-01-22 23:54 ` rguenth at gcc dot gnu dot org 5 siblings, 0 replies; 7+ messages in thread From: rth at gcc dot gnu dot org @ 2010-01-22 18:52 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from rth at gcc dot gnu dot org 2010-01-22 18:52 ------- Subject: Bug 42833 Author: rth Date: Fri Jan 22 18:52:01 2010 New Revision: 156176 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156176 Log: PR tree-opt/42833 * tree-sra.c (sra_modify_assign): Delay re-gimplification of the RHS until after generate_subtree_copies has insertted its code before the current statement. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr42833.c Modified: trunk/gcc/ChangeLog trunk/gcc/tree-sra.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug tree-optimization/42833] [4.5 Regression] sra miscompiles qemu 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org ` (4 preceding siblings ...) 2010-01-22 18:52 ` rth at gcc dot gnu dot org @ 2010-01-22 23:54 ` rguenth at gcc dot gnu dot org 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu dot org @ 2010-01-22 23:54 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from rguenth at gcc dot gnu dot org 2010-01-22 23:54 ------- Fixed. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42833 ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-01-22 23:54 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2010-01-21 16:55 [Bug tree-optimization/42833] New: SRA miscompiles qemu rth at gcc dot gnu dot org 2010-01-21 16:57 ` [Bug tree-optimization/42833] " rth at gcc dot gnu dot org 2010-01-21 19:51 ` [Bug tree-optimization/42833] [4.5 Regression] sra " pinskia at gcc dot gnu dot org 2010-01-21 20:29 ` rth at gcc dot gnu dot org 2010-01-21 20:29 ` rth at gcc dot gnu dot org 2010-01-22 18:52 ` rth at gcc dot gnu dot org 2010-01-22 23:54 ` rguenth at gcc dot gnu dot org
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