[llvm-commits] CVS: llvm/lib/Target/X86/README.txt

[Chris Lattner]

Changes in directory llvm/lib/Target/X86:

README.txt updated: 1.135 -> 1.136
---
Log message:

add a note.  Our 64-bit shifts are ~30% slower than gcc's


---
Diffs of the changes:  (+2 -1)

 README.txt |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)


Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.135 llvm/lib/Target/X86/README.txt:1.136
--- llvm/lib/Target/X86/README.txt:1.135	Sun Sep 17 15:25:45 2006
+++ llvm/lib/Target/X86/README.txt	Mon Sep 18 00:36:54 2006
@@ -59,7 +59,8 @@
 
 But that requires good 8-bit subreg support.
 
-
+64-bit shifts (in general) expand to really bad code.  Instead of using
+cmovs, we should expand to a conditional branch like GCC produces.
 
 //===---------------------------------------------------------------------===//