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

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

README.txt updated: 1.111 -> 1.112
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Log message:

A new entry

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Diffs of the changes:  (+10 -0)

 README.txt |   10 ++++++++++
 1 files changed, 10 insertions(+)


Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.111 llvm/lib/Target/X86/README.txt:1.112
--- llvm/lib/Target/X86/README.txt:1.111	Fri May 19 15:55:31 2006
+++ llvm/lib/Target/X86/README.txt	Sat May 20 02:44:53 2006
@@ -577,3 +577,13 @@
 
 //===---------------------------------------------------------------------===//
 
+Some ideas for instruction selection code simplification: 1. A pre-pass to
+determine which chain producing node can or cannot be folded. The generated
+isel code would then use the information. 2. The same pre-pass can force
+ordering of TokenFactor operands to allow load / store folding. 3. During isel,
+instead of recursively going up the chain operand chain, mark the chain operand
+as available and put it in some work list. Select other nodes in the normal
+manner. The chain operands are selected after all other nodes are selected. Uses
+of chain nodes are modified after instruction selection is completed.
+
+