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Bug 50210 - [4.9/5/6 Regression] ICE: in create_linear_expr_from_tree, at graphite-sese-to-poly.c:1137 with fgraphite-identity -ffast-math -fno-tree-scev-cprop -fstrict-overflow
Summary: [4.9/5/6 Regression] ICE: in create_linear_expr_from_tree, at graphite-sese-t...
Alias: None
Product: gcc
Classification: Unclassified
Component: middle-end (show other bugs)
Version: 4.7.0
: P4 normal
Target Milestone: 4.9.4
Assignee: Not yet assigned to anyone
Keywords: ice-on-valid-code
Depends on:
Blocks: graphite
  Show dependency treegraph
Reported: 2011-08-27 13:07 UTC by Zdenek Sojka
Modified: 2015-10-09 16:45 UTC (History)
1 user (show)

See Also:
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Known to work: 4.5.3
Known to fail: 4.6.2, 4.7.0
Last reconfirmed: 2011-08-27 00:00:00

reduced testcase (the same as gfortran.dg/graphite/id-pr47691.f) (148 bytes, text/plain)
2011-08-27 13:07 UTC, Zdenek Sojka

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Description Zdenek Sojka 2011-08-27 13:07:01 UTC
Created attachment 25118 [details]
reduced testcase (the same as gfortran.dg/graphite/id-pr47691.f)

Even after fixing PR47691, the same ICE is sometimes reached with -fno-tree-scev-cprop.

Compiler output with the attached testcase:
$ gcc -O -fgraphite-identity -ffast-math -fno-tree-scev-cprop -fstrict-overflow testcase.f 
testcase.f: In function ‘MAIN__’:
testcase.f:2:0: internal compiler error: in create_linear_expr_from_tree, at graphite-sese-to-poly.c:1137
Please submit a full bug report,
with preprocessed source if appropriate.
See <> for instructions.

Tested revisions:
r178125 - crash
4.6 r177922 - crash
4.5 r177922 - OK
Comment 1 Dominique d'Humieres 2011-08-27 13:47:25 UTC
4.6 r169161 - OK
4.6 r169790 - crash
Comment 2 Richard Biener 2011-08-27 15:53:16 UTC
It looks like it should be possible to pass down errors to build_poly_scop
instead of asserting.
Comment 3 Jakub Jelinek 2011-10-26 17:13:32 UTC
GCC 4.6.2 is being released.
Comment 4 Jakub Jelinek 2012-03-01 14:38:21 UTC
GCC 4.6.3 is being released.
Comment 5 Jakub Jelinek 2013-04-12 15:15:46 UTC
GCC 4.6.4 has been released and the branch has been closed.
Comment 6 Richard Biener 2014-06-12 13:42:00 UTC
The 4.7 branch is being closed, moving target milestone to 4.8.4.
Comment 7 Jakub Jelinek 2014-12-19 13:25:18 UTC
GCC 4.8.4 has been released.
Comment 8 Richard Biener 2015-06-23 08:14:19 UTC
The gcc-4_8-branch is being closed, re-targeting regressions to 4.9.3.
Comment 9 Jakub Jelinek 2015-06-26 19:52:06 UTC
GCC 4.9.3 has been released.
Comment 10 Sebastian Pop 2015-10-09 16:45:57 UTC
Passes on trunk with ISL-0.15:

$ time gfortran f.f -O -fgraphite-identity -ffast-math -fno-tree-scev-cprop -fstrict-overflow -S
real 0m0.368s