[Bug tree-optimization/96370] [8/9/10 Regression] ICE with -ffast-math since r7-950-g8a85cee26eabf5cf
cvs-commit at gcc dot gnu.org
Fri Sep 11 12:12:12 GMT 2020
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
Author: Richard Biener <firstname.lastname@example.org>
Date: Thu Jul 30 10:24:42 2020 +0200
tree-optimization/96370 - make reassoc expr rewrite more robust
In the face of the more complex tricks in reassoc with respect
to negate processing it can happen that the expression rewrite
is fooled to recurse on a leaf and pick up a bogus expression
code. The following patch makes the expression rewrite more
robust in providing the expression code to it directly since
it is the same for all operations in a chain.
2020-07-30 Richard Biener <email@example.com>
* tree-ssa-reassoc.c (rewrite_expr_tree): Add operation
code parameter and use it instead of picking it up from
the stmt that is being rewritten.
(reassociate_bb): Pass down the operation code.
* gcc.dg/pr96370.c: New testcase.
(cherry picked from commit 2c558d2655cb22f472c83e8296b5cd2a92365cd3)
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