[llvm-commits] [llvm] r48583 - /llvm/trunk/lib/Target/README.txt
Chris Lattner
sabre at nondot.org
Wed Mar 19 21:46:13 PDT 2008
Author: lattner
Date: Wed Mar 19 23:46:13 2008
New Revision: 48583
URL: http://llvm.org/viewvc/llvm-project?rev=48583&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=48583&r1=48582&r2=48583&view=diff
==============================================================================
--- llvm/trunk/lib/Target/README.txt (original)
+++ llvm/trunk/lib/Target/README.txt Wed Mar 19 23:46:13 2008
@@ -772,3 +772,11 @@
badness. PPC64 misses f, f5 and f6. CellSPU aborts in isel.
//===---------------------------------------------------------------------===//
+
+We do a number of simplifications in simplify libcalls to strength reduce
+standard library functions, but we don't currently merge them together. For
+example, it is useful to merge memcpy(a,b,strlen(b)) -> strcpy. This can only
+be done safely if "b" isn't modified between the strlen and memcpy of course.
+
+//===---------------------------------------------------------------------===//
+
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