[Bug tree-optimization/84235] [8 Regression] Miscompilation of floating point code by dom2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84235

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Feb  7 08:29:58 2018
New Revision: 257437

URL: https://gcc.gnu.org/viewcvs?rev=257437&root=gcc&view=rev
Log:
        PR tree-optimization/84235
        * tree-ssa-scopedtables.c
        (avail_exprs_stack::simplify_binary_operation): Fir MINUS_EXPR, punt
        if the subtraction is performed in floating point type where NaNs are
        honored.  For *DIV_EXPR, punt for ALL_FRACT_MODE_Ps where we can't
        build 1.  Formatting fix.

        * gcc.c-torture/execute/ieee/pr84235.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/ieee/pr84235.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-scopedtables.c