[llvm-commits] [llvm] r131863 - /llvm/trunk/lib/Target/README.txt

[Chris Lattner]

Author: lattner
Date: Sun May 22 13:28:46 2011
New Revision: 131863

URL: http://llvm.org/viewvc/llvm-project?rev=131863&view=rev
Log:
add a note.

Modified:
    llvm/trunk/lib/Target/README.txt

Modified: llvm/trunk/lib/Target/README.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/README.txt?rev=131863&r1=131862&r2=131863&view=diff
==============================================================================
--- llvm/trunk/lib/Target/README.txt (original)
+++ llvm/trunk/lib/Target/README.txt Sun May 22 13:28:46 2011
@@ -2346,3 +2346,13 @@
 because one call is passing an i32 and the other is passing an i64.
 
 //===---------------------------------------------------------------------===//
+
+I see this sort of pattern in 176.gcc in a few places (e.g. the start of
+store_bit_field).  The rem should be replaced with a multiply and subtract:
+
+  %3 = sdiv i32 %A, %B
+  %4 = srem i32 %A, %B
+
+Similarly for udiv/urem.
+
+//===---------------------------------------------------------------------===//