[Bug middle-end/68565] [6 Regression] graphite : -O2 -floop-nest-optimize miscompile
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68565 --- Comment #2 from Sebastian Pop --- Author: spop Date: Mon Nov 30 20:39:16 2015 New Revision: 231086 URL: https://gcc.gnu.org/viewcvs?rev=231086=gcc=rev Log: check for ISL generated code that leads to division by zero we used to generate modulo and division by zero because ISL uses big numbers which translate to zero in modulo arithmetic. The patch also improves error handling and bails out early in case of wrong code gen. PR tree-optimization/68565 * graphite-isl-ast-to-gimple.c (binary_op_to_tree): Early return on codegen_error. Fail when rhs of division operations is integer_zerop. (ternary_op_to_tree): Early return on codegen_error. (unary_op_to_tree): Same. (nary_op_to_tree): Same. (gcc_expression_from_isl_expr_op): Same. (gcc_expression_from_isl_expression): Same. (graphite_create_new_loop): On codegen_error continue generating wrong code. (graphite_create_new_loop_guard): Same. (build_iv_mapping): Same. (graphite_create_new_guard): Same. * gfortran.dg/graphite/pr68565.f90: New. Added: trunk/gcc/testsuite/gfortran.dg/graphite/pr68565.f90 Modified: trunk/gcc/ChangeLog trunk/gcc/graphite-isl-ast-to-gimple.c trunk/gcc/testsuite/ChangeLog
[Bug middle-end/68565] [6 Regression] graphite : -O2 -floop-nest-optimize miscompile
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68565 Sebastian Pop changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |FIXED --- Comment #3 from Sebastian Pop --- Fixed. Thanks for the testcase!
[Bug middle-end/68565] [6 Regression] graphite : -O2 -floop-nest-optimize miscompile
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68565 Joost VandeVondele changed: What|Removed |Added Last reconfirmed||2015-11-26 CC||Joost.VandeVondele at mat dot ethz ||.ch, spop at gcc dot gnu.org Target Milestone|--- |6.0 Known to fail||6.0
[Bug middle-end/68565] [6 Regression] graphite : -O2 -floop-nest-optimize miscompile
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68565 Dominique d'Humieres changed: What|Removed |Added Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #1 from Dominique d'Humieres --- Confirmed at r230977, r230903 is OK.
