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* [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear @ 2007-11-07 17:54 janis at gcc dot gnu dot org 2007-11-08 1:57 ` [Bug tree-optimization/34017] " spop at gcc dot gnu dot org ` (7 more replies) 0 siblings, 8 replies; 9+ messages in thread From: janis at gcc dot gnu dot org @ 2007-11-07 17:54 UTC (permalink / raw) To: gcc-bugs Test 445.gobmk in SPEC CPU2006 fails to build on powerpc64-linux with "-m64 -O2 -ftree-loop-linear" due to an ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1840. This test case demonstrates the problem: extern int size; struct data2 { }; struct data1 { int origin; }; static void print (struct data1 *d1, struct data2 *d2) { int m, n; int mini, maxi; int minj, maxj; int origin = d1[0].origin; minj = size; for (m = 0; m < size; m++) for (n = 0; n < size; n++) { if (d1[21 + m * 20 + n].origin != origin) continue; if (m > maxi) maxi = m; if (n < minj) minj = n; } for (m = mini; m <= maxi; m++) { for (n = minj; n <= maxj; n++) { } } } void compute (struct data1 *d1, struct data2 d2[400]) { print (d1, d2); } The failure begins with: http://gcc.gnu.org/viewcvs?view=rev&rev=114205 r114205 | spop | 2006-05-29 16:01:16 +0000 (Mon, 29 May 2006) -- Summary: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree- loop-linear Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: janis at gcc dot gnu dot org GCC target triplet: powerpc64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org @ 2007-11-08 1:57 ` spop at gcc dot gnu dot org 2007-11-19 4:28 ` [Bug tree-optimization/34017] [4.2/4.3 Regression] " pinskia at gcc dot gnu dot org ` (6 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: spop at gcc dot gnu dot org @ 2007-11-08 1:57 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from spop at gcc dot gnu dot org 2007-11-08 01:56 ------- Occurs only on 64bit machines: I cannot reproduce it on i686-linux. I'll give a look at this bug on amd64 later on. Sebastian -- spop at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-11-08 01:56:56 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org 2007-11-08 1:57 ` [Bug tree-optimization/34017] " spop at gcc dot gnu dot org @ 2007-11-19 4:28 ` pinskia at gcc dot gnu dot org 2007-11-22 15:19 ` jakub at gcc dot gnu dot org ` (5 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: pinskia at gcc dot gnu dot org @ 2007-11-19 4:28 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 GCC target triplet|powerpc64-unknown-linux-gnu |LP64 Keywords| |ice-on-valid-code Summary|ICE in |[4.2/4.3 Regression] ICE in |lambda_loopnest_to_gcc_loopn|lambda_loopnest_to_gcc_loopn |est with -O2 -ftree-loop- |est with -O2 -ftree-loop- |linear |linear Target Milestone|--- |4.2.3 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org 2007-11-08 1:57 ` [Bug tree-optimization/34017] " spop at gcc dot gnu dot org 2007-11-19 4:28 ` [Bug tree-optimization/34017] [4.2/4.3 Regression] " pinskia at gcc dot gnu dot org @ 2007-11-22 15:19 ` jakub at gcc dot gnu dot org 2007-11-27 5:57 ` mmitchel at gcc dot gnu dot org ` (4 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: jakub at gcc dot gnu dot org @ 2007-11-22 15:19 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from jakub at gcc dot gnu dot org 2007-11-22 15:19 ------- On the simplified: extern int s; void foo (int *x, int y, int z) { int m, n; int o; int p = x[0]; o = s; for (m = 0; m < s; m++) for (n = 0; n < s; n++) { if (x[n] != p) continue; if (m > z) z = m; if (n < o) o = n; } for (m = y; m <= z; m++) { } } at -O2 -ftree-loop-linear, it fails everywhere I tried, on x86_64-linux with both -m{32,64}, on i686-linux, on sparc64-linux with -m{32,64} and on ppc64-linux with -m{32,64}. <bb 5>: # o_42 = PHI <o_8(4), o_1(12)> # n_40 = PHI <n_25(4), 0(12)> # z_35 = PHI <z_2(4), z_34(12)> D.1559_19 = (long unsigned int) n_40; D.1560_20 = D.1559_19 * 4; D.1561_21 = x_11(D) + D.1560_20; D.1562_22 = *D.1561_21; if (D.1562_22 != p_12) goto <bb 8>; else goto <bb 6>; <bb 6>: z_17 = MAX_EXPR <z_35, m_38>; if (n_40 < o_42) goto <bb 8>; else goto <bb 7>; <bb 7>: <bb 8>: # o_8 = PHI <o_42(5), o_42(7), n_40(6)> # z_2 = PHI <z_35(5), z_17(7), z_17(6)> n_25 = n_40 + 1; if (o_13 > n_25) goto <bb 4>; else goto <bb 9>; This is with IV n_40, oldiv_stmt is # n_40 = PHI <n_25(4), 0(12)> and one of the immediate uses is # o_8 = PHI <o_42(5), o_42(7), n_40(6)> That could have been perhaps transformed into a MIN_EXPR, but unlike the MAX_EXPR phiopt1 has not done that, because there weren't just 2 incoming edges, but 3 (where two used one value and the third different one). I don't see justification for the assert that none of the immediate uses of the IV is a PHI_NODE - it can certainly happen and while it can be harder to fix up, perhaps involving adding some statements on edges, it is nothing that should prevent the transformations. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org ` (2 preceding siblings ...) 2007-11-22 15:19 ` jakub at gcc dot gnu dot org @ 2007-11-27 5:57 ` mmitchel at gcc dot gnu dot org 2008-01-09 5:55 ` spop at gcc dot gnu dot org ` (3 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: mmitchel at gcc dot gnu dot org @ 2007-11-27 5:57 UTC (permalink / raw) To: gcc-bugs -- mmitchel at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org ` (3 preceding siblings ...) 2007-11-27 5:57 ` mmitchel at gcc dot gnu dot org @ 2008-01-09 5:55 ` spop at gcc dot gnu dot org 2008-01-09 7:58 ` spop at gcc dot gnu dot org ` (2 subsequent siblings) 7 siblings, 0 replies; 9+ messages in thread From: spop at gcc dot gnu dot org @ 2008-01-09 5:55 UTC (permalink / raw) To: gcc-bugs -- spop at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |spop at gcc dot gnu dot org |dot org | Status|NEW |ASSIGNED Last reconfirmed|2007-11-08 01:56:56 |2008-01-09 05:27:20 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org ` (4 preceding siblings ...) 2008-01-09 5:55 ` spop at gcc dot gnu dot org @ 2008-01-09 7:58 ` spop at gcc dot gnu dot org 2008-01-09 22:14 ` spop at gcc dot gnu dot org 2008-01-09 22:18 ` spop at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: spop at gcc dot gnu dot org @ 2008-01-09 7:58 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from spop at gcc dot gnu dot org 2008-01-09 06:22 ------- Subject: Re: [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear Patch http://gcc.gnu.org/ml/gcc-patches/2008-01/msg00342.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org ` (5 preceding siblings ...) 2008-01-09 7:58 ` spop at gcc dot gnu dot org @ 2008-01-09 22:14 ` spop at gcc dot gnu dot org 2008-01-09 22:18 ` spop at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: spop at gcc dot gnu dot org @ 2008-01-09 22:14 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from spop at gcc dot gnu dot org 2008-01-09 21:23 ------- Subject: Bug 34017 Author: spop Date: Wed Jan 9 21:22:19 2008 New Revision: 131435 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131435 Log: 2008-01-09 Sebastian Pop <sebastian.pop@amd.com> PR tree-optimization/34017 * lambda-code.c (lambda_loopnest_to_gcc_loopnest): Generate code also for PHI_NODE expressions. * gcc.dg/tree-ssa/pr34017.c: New. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/pr34017.c Modified: trunk/gcc/ChangeLog trunk/gcc/lambda-code.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug tree-optimization/34017] [4.2/4.3 Regression] ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org ` (6 preceding siblings ...) 2008-01-09 22:14 ` spop at gcc dot gnu dot org @ 2008-01-09 22:18 ` spop at gcc dot gnu dot org 7 siblings, 0 replies; 9+ messages in thread From: spop at gcc dot gnu dot org @ 2008-01-09 22:18 UTC (permalink / raw) To: gcc-bugs ------- Comment #5 from spop at gcc dot gnu dot org 2008-01-09 21:23 ------- Fixed. -- spop at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34017 ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2008-01-09 21:23 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2007-11-07 17:54 [Bug tree-optimization/34017] New: ICE in lambda_loopnest_to_gcc_loopnest with -O2 -ftree-loop-linear janis at gcc dot gnu dot org 2007-11-08 1:57 ` [Bug tree-optimization/34017] " spop at gcc dot gnu dot org 2007-11-19 4:28 ` [Bug tree-optimization/34017] [4.2/4.3 Regression] " pinskia at gcc dot gnu dot org 2007-11-22 15:19 ` jakub at gcc dot gnu dot org 2007-11-27 5:57 ` mmitchel at gcc dot gnu dot org 2008-01-09 5:55 ` spop at gcc dot gnu dot org 2008-01-09 7:58 ` spop at gcc dot gnu dot org 2008-01-09 22:14 ` spop at gcc dot gnu dot org 2008-01-09 22:18 ` spop at gcc dot gnu dot org
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