From: Evan Cheng <evan.cheng@apple.com>
Date: Sat, 17 Dec 2005 06:54:43 +0000 (+0000)
Subject: Added an idea about any_extend for performance tuning.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=98abbfb2ef9c19238a0eb1683814b2ba6bbacdcb;p=oota-llvm.git

Added an idea about any_extend for performance tuning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24763 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 6e23fca25c6..5fdcc696193 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -102,3 +102,8 @@ Some isel ideas:
 //===---------------------------------------------------------------------===//
 
 Should we promote i16 to i32 to avoid partial register update stalls?
+
+//===---------------------------------------------------------------------===//
+
+Leave any_extend as pseudo instruction and hint to register
+allocator. Delay codegen until post register allocation.