Changes in directory llvm/lib/Target/X86:
README.txt updated: 1.26 -> 1.27
---
Log message:
add a missed optimization
---
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:1.26 llvm/lib/Target/X86/README.txt:1.27
--- llvm/lib/Target/X86/README.txt:1.26 Sun Jan 29 00:48:25 2006
+++ llvm/lib/Target/X86/README.txt Sun Jan 29 03:08:15 2006
@@ -204,3 +204,13 @@
disambiguate the pointers.
Number 1 is the preferred solution.
+
+//===---------------------------------------------------------------------===//
+
+The instruction selector sometimes misses folding a load into a compare. The
+pattern is written as (cmp reg, (load p)). Because the compare isn't
+commutative, it is not matched with the load on both sides. The dag combiner
+should be made smart enough to cannonicalize the load into the RHS of a compare
+when it can invert the result of the compare for free.
+
+
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