From d732a2915bcfe52b5bcbd364ca45c426f3b214af Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 28 Mar 2006 18:56:23 +0000 Subject: [PATCH] add a note git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27227 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/README_ALTIVEC.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/Target/PowerPC/README_ALTIVEC.txt b/lib/Target/PowerPC/README_ALTIVEC.txt index 7754f4c13c8..d4c944b6de7 100644 --- a/lib/Target/PowerPC/README_ALTIVEC.txt +++ b/lib/Target/PowerPC/README_ALTIVEC.txt @@ -134,4 +134,14 @@ This would fix two problems: 2. Identical operations in different types are not getting CSE'd (e.g. { 0U, 0U, 0U, 0U } and {0.0, 0.0, 0.0, 0.0}. +//===----------------------------------------------------------------------===// + +Two identical comparisons in predicate and nonpredicate form like this: + +a = vec_cmpb(x, y); +b = vec_any_out(x, y); + +Should turn into one "." compare instruction, not a dot and "nondot" form. + +//===----------------------------------------------------------------------===//