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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/62041] vector fneg codegen uses a subtract instead of an xor (x86-64) Date: Thu, 07 Aug 2014 10:22:00 -0000 [thread overview] Message-ID: <bug-62041-4-Va0ehutUss@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-62041-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62041 --- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> --- (The gimple version works with -ffast-math at least) In fold-const.c, fold_real_zero_addition_p has: /* In a vector or complex, we would need to check the sign of all zeros. */ if (TREE_CODE (addend) != REAL_CST) return false; We should probably check the sign of all zeros indeed.
prev parent reply other threads:[~2014-08-07 10:22 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-08-06 19:06 [Bug target/62041] New: " spatel at rotateright dot com 2014-08-07 9:42 ` [Bug rtl-optimization/62041] " rguenth at gcc dot gnu.org 2014-08-07 10:06 ` glisse at gcc dot gnu.org 2014-08-07 10:10 ` glisse at gcc dot gnu.org 2014-08-07 10:22 ` glisse at gcc dot gnu.org [this message]
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