From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 28 Feb 2006 23:38:49 +0000 (+0000)
Subject: Another entry.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aafc1412b1ff4427adf763b371ba930282c0d509;p=oota-llvm.git

Another entry.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26430 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 6c9a235ebbb..c85477c1a68 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -517,3 +517,19 @@ It would be better to emit "cmp %al, 1" than a xor and test.
 //===---------------------------------------------------------------------===//
 
 Enable X86InstrInfo::convertToThreeAddress().
+
+//===---------------------------------------------------------------------===//
+
+Investigate whether it is better to codegen the following
+
+        %tmp.1 = mul int %x, 9
+to
+
+	movl	4(%esp), %eax
+	leal	(%eax,%eax,8), %eax
+
+as opposed to what llc is currently generating:
+
+	imull $9, 4(%esp), %eax
+
+Currently the load folding imull has a higher complexity than the LEA32 pattern.