[Bug middle-end/46019] [4.3/4.4/4.5/4.6 Regression] x / (0x200000000ULL << y) miscompilation with 32-bit HWI

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46019

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-10-18 
08:26:09 UTC ---
Author: jakub
Date: Mon Oct 18 08:26:06 2010
New Revision: 165610

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165610
Log:
    PR middle-end/46019
    * fold-const.c (fold_binary_loc): If integer_pow2p has
    TREE_INT_CST_LOW zero, look at TREE_INT_CST_HIGH.

    * gcc.c-torture/execute/pr46019.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr46019.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog